Add info if linked acc

.dockerignore

@@ -0,0 +1,41 @@
+# Dependencies
+node_modules
+*/node_modules
+
+# Build outputs
+dist
+build
+*.pyc
+__pycache__
+
+# Git
+.git
+.gitignore
+
+# IDE
+.idea
+.vscode
+*.swp
+*.swo
+
+# Logs
+*.log
+npm-debug.log*
+
+# Environment files (keep .env.example)
+.env
+.env.local
+.env.*.local
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Test & coverage
+coverage
+.pytest_cache
+.coverage
+
+# Misc
+*.md
+!README.md

.env.example

@@ -11,5 +11,14 @@ OPENAI_API_KEY=sk-...
 # Telegram Bot
 TELEGRAM_BOT_TOKEN=123456:ABC-DEF...
 
+# S3 Storage - FirstVDS (set S3_ENABLED=true to use)
+S3_ENABLED=false
+S3_BUCKET_NAME=your-bucket-name
+S3_REGION=ru-1
+S3_ACCESS_KEY_ID=your-access-key-id
+S3_SECRET_ACCESS_KEY=your-secret-access-key
+S3_ENDPOINT_URL=https://s3.firstvds.ru
+S3_PUBLIC_URL=https://your-bucket-name.s3.firstvds.ru
+
 # Frontend (for build)
 VITE_API_URL=/api/v1

backend/alembic/versions/007_add_event_assignment_fields.py

@@ -0,0 +1,54 @@
+"""Add is_event_assignment and event_id to assignments for Common Enemy support
+
+Revision ID: 007_add_event_assignment_fields
+Revises: 006_add_swap_requests
+Create Date: 2024-12-15
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = '007_add_event_assignment_fields'
+down_revision: Union[str, None] = '006_add_swap_requests'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # Add is_event_assignment column with default False
+    conn = op.get_bind()
+    inspector = sa.inspect(conn)
+    columns = [col['name'] for col in inspector.get_columns('assignments')]
+
+    if 'is_event_assignment' not in columns:
+        op.add_column(
+            'assignments',
+            sa.Column('is_event_assignment', sa.Boolean(), nullable=False, server_default=sa.false())
+        )
+        op.create_index('ix_assignments_is_event_assignment', 'assignments', ['is_event_assignment'])
+
+    if 'event_id' not in columns:
+        op.add_column(
+            'assignments',
+            sa.Column('event_id', sa.Integer(), nullable=True)
+        )
+        op.create_foreign_key(
+            'fk_assignments_event_id',
+            'assignments',
+            'events',
+            ['event_id'],
+            ['id'],
+            ondelete='SET NULL'
+        )
+        op.create_index('ix_assignments_event_id', 'assignments', ['event_id'])
+
+
+def downgrade() -> None:
+    op.drop_index('ix_assignments_event_id', table_name='assignments')
+    op.drop_constraint('fk_assignments_event_id', 'assignments', type_='foreignkey')
+    op.drop_column('assignments', 'event_id')
+    op.drop_index('ix_assignments_is_event_assignment', table_name='assignments')
+    op.drop_column('assignments', 'is_event_assignment')

backend/alembic/versions/008_rename_rematch_to_game_choice.py

@@ -0,0 +1,41 @@
+"""Rename rematch event type to game_choice
+
+Revision ID: 008_rename_to_game_choice
+Revises: 007_add_event_assignment_fields
+Create Date: 2024-12-15
+
+"""
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = "008_rename_to_game_choice"
+down_revision = "007_add_event_assignment_fields"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Update event type from 'rematch' to 'game_choice' in events table
+    op.execute("UPDATE events SET type = 'game_choice' WHERE type = 'rematch'")
+
+    # Update event_type in assignments table
+    op.execute("UPDATE assignments SET event_type = 'game_choice' WHERE event_type = 'rematch'")
+
+    # Update activity data that references rematch event
+    op.execute("""
+        UPDATE activities
+        SET data = jsonb_set(data, '{event_type}', '"game_choice"')
+        WHERE data->>'event_type' = 'rematch'
+    """)
+
+
+def downgrade() -> None:
+    # Revert event type from 'game_choice' to 'rematch'
+    op.execute("UPDATE events SET type = 'rematch' WHERE type = 'game_choice'")
+    op.execute("UPDATE assignments SET event_type = 'rematch' WHERE event_type = 'game_choice'")
+    op.execute("""
+        UPDATE activities
+        SET data = jsonb_set(data, '{event_type}', '"rematch"')
+        WHERE data->>'event_type' = 'game_choice'
+    """)

backend/alembic/versions/009_add_disputes.py

@@ -0,0 +1,81 @@
+"""Add disputes tables for proof verification system
+
+Revision ID: 009_add_disputes
+Revises: 008_rename_to_game_choice
+Create Date: 2024-12-16
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = '009_add_disputes'
+down_revision: Union[str, None] = '008_rename_to_game_choice'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    conn = op.get_bind()
+    inspector = sa.inspect(conn)
+    tables = inspector.get_table_names()
+
+    # Create disputes table
+    if 'disputes' not in tables:
+        op.create_table(
+            'disputes',
+            sa.Column('id', sa.Integer(), nullable=False),
+            sa.Column('assignment_id', sa.Integer(), nullable=False),
+            sa.Column('raised_by_id', sa.Integer(), nullable=False),
+            sa.Column('reason', sa.Text(), nullable=False),
+            sa.Column('status', sa.String(20), nullable=False, server_default='open'),
+            sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.func.now()),
+            sa.Column('resolved_at', sa.DateTime(), nullable=True),
+            sa.PrimaryKeyConstraint('id'),
+            sa.ForeignKeyConstraint(['assignment_id'], ['assignments.id'], ondelete='CASCADE'),
+            sa.ForeignKeyConstraint(['raised_by_id'], ['users.id'], ondelete='CASCADE'),
+            sa.UniqueConstraint('assignment_id', name='uq_dispute_assignment'),
+        )
+        op.create_index('ix_disputes_assignment_id', 'disputes', ['assignment_id'])
+
+    # Create dispute_comments table
+    if 'dispute_comments' not in tables:
+        op.create_table(
+            'dispute_comments',
+            sa.Column('id', sa.Integer(), nullable=False),
+            sa.Column('dispute_id', sa.Integer(), nullable=False),
+            sa.Column('user_id', sa.Integer(), nullable=False),
+            sa.Column('text', sa.Text(), nullable=False),
+            sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.func.now()),
+            sa.PrimaryKeyConstraint('id'),
+            sa.ForeignKeyConstraint(['dispute_id'], ['disputes.id'], ondelete='CASCADE'),
+            sa.ForeignKeyConstraint(['user_id'], ['users.id'], ondelete='CASCADE'),
+        )
+        op.create_index('ix_dispute_comments_dispute_id', 'dispute_comments', ['dispute_id'])
+
+    # Create dispute_votes table
+    if 'dispute_votes' not in tables:
+        op.create_table(
+            'dispute_votes',
+            sa.Column('id', sa.Integer(), nullable=False),
+            sa.Column('dispute_id', sa.Integer(), nullable=False),
+            sa.Column('user_id', sa.Integer(), nullable=False),
+            sa.Column('vote', sa.Boolean(), nullable=False),
+            sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.func.now()),
+            sa.PrimaryKeyConstraint('id'),
+            sa.ForeignKeyConstraint(['dispute_id'], ['disputes.id'], ondelete='CASCADE'),
+            sa.ForeignKeyConstraint(['user_id'], ['users.id'], ondelete='CASCADE'),
+            sa.UniqueConstraint('dispute_id', 'user_id', name='uq_dispute_vote_user'),
+        )
+        op.create_index('ix_dispute_votes_dispute_id', 'dispute_votes', ['dispute_id'])
+
+
+def downgrade() -> None:
+    op.drop_index('ix_dispute_votes_dispute_id', table_name='dispute_votes')
+    op.drop_table('dispute_votes')
+    op.drop_index('ix_dispute_comments_dispute_id', table_name='dispute_comments')
+    op.drop_table('dispute_comments')
+    op.drop_index('ix_disputes_assignment_id', table_name='disputes')
+    op.drop_table('disputes')

backend/alembic/versions/010_add_telegram_profile.py

@@ -0,0 +1,30 @@
+"""Add telegram profile fields to users
+
+Revision ID: 010_add_telegram_profile
+Revises: 009_add_disputes
+Create Date: 2024-12-16
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '010_add_telegram_profile'
+down_revision: Union[str, None] = '009_add_disputes'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column('users', sa.Column('telegram_first_name', sa.String(100), nullable=True))
+    op.add_column('users', sa.Column('telegram_last_name', sa.String(100), nullable=True))
+    op.add_column('users', sa.Column('telegram_avatar_url', sa.String(500), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column('users', 'telegram_avatar_url')
+    op.drop_column('users', 'telegram_last_name')
+    op.drop_column('users', 'telegram_first_name')

backend/app/api/v1/__init__.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter
 
-from app.api.v1 import auth, users, marathons, games, challenges, wheel, feed, admin, events
+from app.api.v1 import auth, users, marathons, games, challenges, wheel, feed, admin, events, assignments, telegram
 
 router = APIRouter(prefix="/api/v1")
 
@@ -13,3 +13,5 @@ router.include_router(wheel.router)
 router.include_router(feed.router)
 router.include_router(admin.router)
 router.include_router(events.router)
+router.include_router(assignments.router)
+router.include_router(telegram.router)

backend/app/api/v1/assignments.py

@@ -0,0 +1,555 @@
+"""
+Assignment details and dispute system endpoints.
+"""
+from datetime import datetime, timedelta, timezone
+from fastapi import APIRouter, HTTPException, Request
+from fastapi.responses import Response, StreamingResponse
+from sqlalchemy import select
+from sqlalchemy.orm import selectinload
+
+from app.api.deps import DbSession, CurrentUser
+from app.models import (
+    Assignment, AssignmentStatus, Participant, Challenge, User, Marathon,
+    Dispute, DisputeStatus, DisputeComment, DisputeVote,
+)
+from app.schemas import (
+    AssignmentDetailResponse, DisputeCreate, DisputeResponse,
+    DisputeCommentCreate, DisputeCommentResponse, DisputeVoteCreate,
+    MessageResponse, ChallengeResponse, GameShort, ReturnedAssignmentResponse,
+)
+from app.schemas.user import UserPublic
+from app.services.storage import storage_service
+from app.services.telegram_notifier import telegram_notifier
+
+router = APIRouter(tags=["assignments"])
+
+# Dispute window: 24 hours after completion
+DISPUTE_WINDOW_HOURS = 24
+
+
+def user_to_public(user: User) -> UserPublic:
+    """Convert User model to UserPublic schema"""
+    return UserPublic(
+        id=user.id,
+        login=user.login,
+        nickname=user.nickname,
+        avatar_url=None,
+        role=user.role,
+        created_at=user.created_at,
+    )
+
+
+def build_dispute_response(dispute: Dispute, current_user_id: int) -> DisputeResponse:
+    """Build DisputeResponse from Dispute model"""
+    votes_valid = sum(1 for v in dispute.votes if v.vote is True)
+    votes_invalid = sum(1 for v in dispute.votes if v.vote is False)
+
+    my_vote = None
+    for v in dispute.votes:
+        if v.user_id == current_user_id:
+            my_vote = v.vote
+            break
+
+    # Ensure expires_at has UTC timezone info for correct frontend parsing
+    created_at_utc = dispute.created_at.replace(tzinfo=timezone.utc) if dispute.created_at.tzinfo is None else dispute.created_at
+    expires_at = created_at_utc + timedelta(hours=DISPUTE_WINDOW_HOURS)
+
+    return DisputeResponse(
+        id=dispute.id,
+        raised_by=user_to_public(dispute.raised_by),
+        reason=dispute.reason,
+        status=dispute.status,
+        comments=[
+            DisputeCommentResponse(
+                id=c.id,
+                user=user_to_public(c.user),
+                text=c.text,
+                created_at=c.created_at,
+            )
+            for c in sorted(dispute.comments, key=lambda x: x.created_at)
+        ],
+        votes=[
+            {
+                "user": user_to_public(v.user),
+                "vote": v.vote,
+                "created_at": v.created_at,
+            }
+            for v in dispute.votes
+        ],
+        votes_valid=votes_valid,
+        votes_invalid=votes_invalid,
+        my_vote=my_vote,
+        expires_at=expires_at,
+        created_at=dispute.created_at,
+        resolved_at=dispute.resolved_at,
+    )
+
+
+@router.get("/assignments/{assignment_id}", response_model=AssignmentDetailResponse)
+async def get_assignment_detail(
+    assignment_id: int,
+    current_user: CurrentUser,
+    db: DbSession,
+):
+    """Get detailed information about an assignment including proofs and dispute"""
+    # Get assignment with all relationships
+    result = await db.execute(
+        select(Assignment)
+        .options(
+            selectinload(Assignment.challenge).selectinload(Challenge.game),
+            selectinload(Assignment.participant).selectinload(Participant.user),
+            selectinload(Assignment.dispute).selectinload(Dispute.raised_by),
+            selectinload(Assignment.dispute).selectinload(Dispute.comments).selectinload(DisputeComment.user),
+            selectinload(Assignment.dispute).selectinload(Dispute.votes).selectinload(DisputeVote.user),
+        )
+        .where(Assignment.id == assignment_id)
+    )
+    assignment = result.scalar_one_or_none()
+
+    if not assignment:
+        raise HTTPException(status_code=404, detail="Assignment not found")
+
+    # Check user is participant of the marathon
+    marathon_id = assignment.challenge.game.marathon_id
+    result = await db.execute(
+        select(Participant).where(
+            Participant.user_id == current_user.id,
+            Participant.marathon_id == marathon_id,
+        )
+    )
+    participant = result.scalar_one_or_none()
+    if not participant:
+        raise HTTPException(status_code=403, detail="You are not a participant of this marathon")
+
+    # Build response
+    challenge = assignment.challenge
+    game = challenge.game
+    owner_user = assignment.participant.user
+
+    # Determine if user can dispute
+    can_dispute = False
+    if (
+        assignment.status == AssignmentStatus.COMPLETED.value
+        and assignment.completed_at
+        and assignment.participant.user_id != current_user.id
+        and assignment.dispute is None
+    ):
+        time_since_completion = datetime.utcnow() - assignment.completed_at
+        can_dispute = time_since_completion < timedelta(hours=DISPUTE_WINDOW_HOURS)
+
+    # Build proof URLs
+    proof_image_url = storage_service.get_url(assignment.proof_path, "proofs")
+
+    return AssignmentDetailResponse(
+        id=assignment.id,
+        challenge=ChallengeResponse(
+            id=challenge.id,
+            title=challenge.title,
+            description=challenge.description,
+            type=challenge.type,
+            difficulty=challenge.difficulty,
+            points=challenge.points,
+            estimated_time=challenge.estimated_time,
+            proof_type=challenge.proof_type,
+            proof_hint=challenge.proof_hint,
+            game=GameShort(
+                id=game.id,
+                title=game.title,
+                cover_url=storage_service.get_url(game.cover_path, "covers"),
+            ),
+            is_generated=challenge.is_generated,
+            created_at=challenge.created_at,
+        ),
+        participant=user_to_public(owner_user),
+        status=assignment.status,
+        proof_url=assignment.proof_url,
+        proof_image_url=proof_image_url,
+        proof_comment=assignment.proof_comment,
+        points_earned=assignment.points_earned,
+        streak_at_completion=assignment.streak_at_completion,
+        started_at=assignment.started_at,
+        completed_at=assignment.completed_at,
+        can_dispute=can_dispute,
+        dispute=build_dispute_response(assignment.dispute, current_user.id) if assignment.dispute else None,
+    )
+
+
+@router.get("/assignments/{assignment_id}/proof-media")
+async def get_assignment_proof_media(
+    assignment_id: int,
+    request: Request,
+    current_user: CurrentUser,
+    db: DbSession,
+):
+    """Stream the proof media (image or video) for an assignment with Range support"""
+    # Get assignment
+    result = await db.execute(
+        select(Assignment)
+        .options(
+            selectinload(Assignment.challenge).selectinload(Challenge.game),
+        )
+        .where(Assignment.id == assignment_id)
+    )
+    assignment = result.scalar_one_or_none()
+
+    if not assignment:
+        raise HTTPException(status_code=404, detail="Assignment not found")
+
+    # Check user is participant of the marathon
+    marathon_id = assignment.challenge.game.marathon_id
+    result = await db.execute(
+        select(Participant).where(
+            Participant.user_id == current_user.id,
+            Participant.marathon_id == marathon_id,
+        )
+    )
+    participant = result.scalar_one_or_none()
+    if not participant:
+        raise HTTPException(status_code=403, detail="You are not a participant of this marathon")
+
+    # Check if proof exists
+    if not assignment.proof_path:
+        raise HTTPException(status_code=404, detail="No proof media for this assignment")
+
+    # Get file from storage
+    file_data = await storage_service.get_file(assignment.proof_path, "proofs")
+    if not file_data:
+        raise HTTPException(status_code=404, detail="Proof media not found in storage")
+
+    content, content_type = file_data
+    file_size = len(content)
+
+    # Check if it's a video and handle Range requests
+    is_video = content_type.startswith("video/")
+
+    if is_video:
+        range_header = request.headers.get("range")
+
+        if range_header:
+            # Parse range header
+            range_match = range_header.replace("bytes=", "").split("-")
+            start = int(range_match[0]) if range_match[0] else 0
+            end = int(range_match[1]) if range_match[1] else file_size - 1
+
+            # Ensure valid range
+            if start >= file_size:
+                raise HTTPException(status_code=416, detail="Range not satisfiable")
+
+            end = min(end, file_size - 1)
+            chunk = content[start:end + 1]
+
+            return Response(
+                content=chunk,
+                status_code=206,
+                media_type=content_type,
+                headers={
+                    "Content-Range": f"bytes {start}-{end}/{file_size}",
+                    "Accept-Ranges": "bytes",
+                    "Content-Length": str(len(chunk)),
+                    "Cache-Control": "public, max-age=31536000",
+                }
+            )
+
+        # No range header - return full video with Accept-Ranges
+        return Response(
+            content=content,
+            media_type=content_type,
+            headers={
+                "Accept-Ranges": "bytes",
+                "Content-Length": str(file_size),
+                "Cache-Control": "public, max-age=31536000",
+            }
+        )
+
+    # For images, just return the content
+    return Response(
+        content=content,
+        media_type=content_type,
+        headers={
+            "Cache-Control": "public, max-age=31536000",
+        }
+    )
+
+
+# Keep old endpoint for backwards compatibility
+@router.get("/assignments/{assignment_id}/proof-image")
+async def get_assignment_proof_image(
+    assignment_id: int,
+    request: Request,
+    current_user: CurrentUser,
+    db: DbSession,
+):
+    """Deprecated: Use proof-media instead. Redirects to proof-media."""
+    return await get_assignment_proof_media(assignment_id, request, current_user, db)
+
+
+@router.post("/assignments/{assignment_id}/dispute", response_model=DisputeResponse)
+async def create_dispute(
+    assignment_id: int,
+    data: DisputeCreate,
+    current_user: CurrentUser,
+    db: DbSession,
+):
+    """Create a dispute against an assignment's proof"""
+    # Get assignment
+    result = await db.execute(
+        select(Assignment)
+        .options(
+            selectinload(Assignment.challenge).selectinload(Challenge.game),
+            selectinload(Assignment.participant),
+            selectinload(Assignment.dispute),
+        )
+        .where(Assignment.id == assignment_id)
+    )
+    assignment = result.scalar_one_or_none()
+
+    if not assignment:
+        raise HTTPException(status_code=404, detail="Assignment not found")
+
+    # Check user is participant of the marathon
+    marathon_id = assignment.challenge.game.marathon_id
+    result = await db.execute(
+        select(Participant).where(
+            Participant.user_id == current_user.id,
+            Participant.marathon_id == marathon_id,
+        )
+    )
+    participant = result.scalar_one_or_none()
+    if not participant:
+        raise HTTPException(status_code=403, detail="You are not a participant of this marathon")
+
+    # Validate
+    if assignment.status != AssignmentStatus.COMPLETED.value:
+        raise HTTPException(status_code=400, detail="Can only dispute completed assignments")
+
+    if assignment.participant.user_id == current_user.id:
+        raise HTTPException(status_code=400, detail="Cannot dispute your own assignment")
+
+    if assignment.dispute:
+        raise HTTPException(status_code=400, detail="A dispute already exists for this assignment")
+
+    if not assignment.completed_at:
+        raise HTTPException(status_code=400, detail="Assignment has no completion date")
+
+    time_since_completion = datetime.utcnow() - assignment.completed_at
+    if time_since_completion >= timedelta(hours=DISPUTE_WINDOW_HOURS):
+        raise HTTPException(status_code=400, detail="Dispute window has expired (24 hours)")
+
+    # Create dispute
+    dispute = Dispute(
+        assignment_id=assignment_id,
+        raised_by_id=current_user.id,
+        reason=data.reason,
+        status=DisputeStatus.OPEN.value,
+    )
+    db.add(dispute)
+    await db.commit()
+    await db.refresh(dispute)
+
+    # Send notification to assignment owner
+    result = await db.execute(select(Marathon).where(Marathon.id == marathon_id))
+    marathon = result.scalar_one_or_none()
+    if marathon:
+        await telegram_notifier.notify_dispute_raised(
+            db,
+            user_id=assignment.participant.user_id,
+            marathon_title=marathon.title,
+            challenge_title=assignment.challenge.title
+        )
+
+    # Load relationships for response
+    result = await db.execute(
+        select(Dispute)
+        .options(
+            selectinload(Dispute.raised_by),
+            selectinload(Dispute.comments).selectinload(DisputeComment.user),
+            selectinload(Dispute.votes).selectinload(DisputeVote.user),
+        )
+        .where(Dispute.id == dispute.id)
+    )
+    dispute = result.scalar_one()
+
+    return build_dispute_response(dispute, current_user.id)
+
+
+@router.post("/disputes/{dispute_id}/comments", response_model=DisputeCommentResponse)
+async def add_dispute_comment(
+    dispute_id: int,
+    data: DisputeCommentCreate,
+    current_user: CurrentUser,
+    db: DbSession,
+):
+    """Add a comment to a dispute discussion"""
+    # Get dispute with assignment
+    result = await db.execute(
+        select(Dispute)
+        .options(
+            selectinload(Dispute.assignment).selectinload(Assignment.challenge).selectinload(Challenge.game),
+        )
+        .where(Dispute.id == dispute_id)
+    )
+    dispute = result.scalar_one_or_none()
+
+    if not dispute:
+        raise HTTPException(status_code=404, detail="Dispute not found")
+
+    if dispute.status != DisputeStatus.OPEN.value:
+        raise HTTPException(status_code=400, detail="Dispute is already resolved")
+
+    # Check user is participant of the marathon
+    marathon_id = dispute.assignment.challenge.game.marathon_id
+    result = await db.execute(
+        select(Participant).where(
+            Participant.user_id == current_user.id,
+            Participant.marathon_id == marathon_id,
+        )
+    )
+    participant = result.scalar_one_or_none()
+    if not participant:
+        raise HTTPException(status_code=403, detail="You are not a participant of this marathon")
+
+    # Create comment
+    comment = DisputeComment(
+        dispute_id=dispute_id,
+        user_id=current_user.id,
+        text=data.text,
+    )
+    db.add(comment)
+    await db.commit()
+    await db.refresh(comment)
+
+    # Get user for response
+    result = await db.execute(select(User).where(User.id == current_user.id))
+    user = result.scalar_one()
+
+    return DisputeCommentResponse(
+        id=comment.id,
+        user=user_to_public(user),
+        text=comment.text,
+        created_at=comment.created_at,
+    )
+
+
+@router.post("/disputes/{dispute_id}/vote", response_model=MessageResponse)
+async def vote_on_dispute(
+    dispute_id: int,
+    data: DisputeVoteCreate,
+    current_user: CurrentUser,
+    db: DbSession,
+):
+    """Vote on a dispute (True = valid/proof is OK, False = invalid/proof is not OK)"""
+    # Get dispute with assignment
+    result = await db.execute(
+        select(Dispute)
+        .options(
+            selectinload(Dispute.assignment).selectinload(Assignment.challenge).selectinload(Challenge.game),
+        )
+        .where(Dispute.id == dispute_id)
+    )
+    dispute = result.scalar_one_or_none()
+
+    if not dispute:
+        raise HTTPException(status_code=404, detail="Dispute not found")
+
+    if dispute.status != DisputeStatus.OPEN.value:
+        raise HTTPException(status_code=400, detail="Dispute is already resolved")
+
+    # Check user is participant of the marathon
+    marathon_id = dispute.assignment.challenge.game.marathon_id
+    result = await db.execute(
+        select(Participant).where(
+            Participant.user_id == current_user.id,
+            Participant.marathon_id == marathon_id,
+        )
+    )
+    participant = result.scalar_one_or_none()
+    if not participant:
+        raise HTTPException(status_code=403, detail="You are not a participant of this marathon")
+
+    # Check if user already voted
+    result = await db.execute(
+        select(DisputeVote).where(
+            DisputeVote.dispute_id == dispute_id,
+            DisputeVote.user_id == current_user.id,
+        )
+    )
+    existing_vote = result.scalar_one_or_none()
+
+    if existing_vote:
+        # Update existing vote
+        existing_vote.vote = data.vote
+        existing_vote.created_at = datetime.utcnow()
+    else:
+        # Create new vote
+        vote = DisputeVote(
+            dispute_id=dispute_id,
+            user_id=current_user.id,
+            vote=data.vote,
+        )
+        db.add(vote)
+
+    await db.commit()
+
+    vote_text = "валидным" if data.vote else "невалидным"
+    return MessageResponse(message=f"Вы проголосовали: пруф {vote_text}")
+
+
+@router.get("/marathons/{marathon_id}/returned-assignments", response_model=list[ReturnedAssignmentResponse])
+async def get_returned_assignments(
+    marathon_id: int,
+    current_user: CurrentUser,
+    db: DbSession,
+):
+    """Get current user's returned assignments that need to be redone"""
+    # Check user is participant
+    result = await db.execute(
+        select(Participant).where(
+            Participant.user_id == current_user.id,
+            Participant.marathon_id == marathon_id,
+        )
+    )
+    participant = result.scalar_one_or_none()
+    if not participant:
+        raise HTTPException(status_code=403, detail="You are not a participant of this marathon")
+
+    # Get returned assignments
+    result = await db.execute(
+        select(Assignment)
+        .options(
+            selectinload(Assignment.challenge).selectinload(Challenge.game),
+            selectinload(Assignment.dispute),
+        )
+        .where(
+            Assignment.participant_id == participant.id,
+            Assignment.status == AssignmentStatus.RETURNED.value,
+        )
+        .order_by(Assignment.completed_at.asc())  # Oldest first
+    )
+    assignments = result.scalars().all()
+
+    return [
+        ReturnedAssignmentResponse(
+            id=a.id,
+            challenge=ChallengeResponse(
+                id=a.challenge.id,
+                title=a.challenge.title,
+                description=a.challenge.description,
+                type=a.challenge.type,
+                difficulty=a.challenge.difficulty,
+                points=a.challenge.points,
+                estimated_time=a.challenge.estimated_time,
+                proof_type=a.challenge.proof_type,
+                proof_hint=a.challenge.proof_hint,
+                game=GameShort(
+                    id=a.challenge.game.id,
+                    title=a.challenge.game.title,
+                    cover_url=storage_service.get_url(a.challenge.game.cover_path, "covers"),
+                ),
+                is_generated=a.challenge.is_generated,
+                created_at=a.challenge.created_at,
+            ),
+            original_completed_at=a.completed_at,
+            dispute_reason=a.dispute.reason if a.dispute else "Оспорено",
+        )
+        for a in assignments
+    ]

backend/app/api/v1/events.py

@@ -10,15 +10,19 @@ from app.models import (
     Event, EventType, Activity, ActivityType, Assignment, AssignmentStatus, Challenge,
     SwapRequest as SwapRequestModel, SwapRequestStatus, User,
 )
+from fastapi import UploadFile, File, Form
+
 from app.schemas import (
     EventCreate, EventResponse, ActiveEventResponse, EventEffects,
     MessageResponse, SwapRequest, ChallengeResponse, GameShort, SwapCandidate,
     SwapRequestCreate, SwapRequestResponse, SwapRequestChallengeInfo, MySwapRequests,
-    CommonEnemyLeaderboard,
+    CommonEnemyLeaderboard, EventAssignmentResponse, AssignmentResponse, CompleteResult,
 )
+from app.core.config import settings
 from app.schemas.event import EVENT_INFO, COMMON_ENEMY_BONUSES
 from app.schemas.user import UserPublic
 from app.services.events import event_service
+from app.services.storage import storage_service
 
 router = APIRouter(tags=["events"])
 
@@ -635,129 +639,173 @@ async def cancel_swap_request(
     return MessageResponse(message="Swap request cancelled")
 
 
-@router.post("/marathons/{marathon_id}/rematch/{assignment_id}", response_model=MessageResponse)
+# ==================== Game Choice Event Endpoints ====================
-async def rematch_assignment(
+
+
+class GameChoiceChallengeResponse(BaseModel):
+    """Challenge option for game choice event"""
+    id: int
+    title: str
+    description: str
+    difficulty: str
+    points: int
+    estimated_time: int | None
+    proof_type: str
+    proof_hint: str | None
+
+
+class GameChoiceChallengesResponse(BaseModel):
+    """Response with available challenges for game choice"""
+    game_id: int
+    game_title: str
+    challenges: list[GameChoiceChallengeResponse]
+
+
+class GameChoiceSelectRequest(BaseModel):
+    """Request to select a challenge during game choice event"""
+    challenge_id: int
+
+
+@router.get("/marathons/{marathon_id}/game-choice/challenges", response_model=GameChoiceChallengesResponse)
+async def get_game_choice_challenges(
     marathon_id: int,
-    assignment_id: int,
+    game_id: int,
     current_user: CurrentUser,
     db: DbSession,
 ):
-    """Retry a dropped assignment (during rematch event)"""
+    """Get 3 random challenges from a game for game choice event"""
+    from app.models import Game
+    from sqlalchemy.sql.expression import func
+
     await get_marathon_or_404(db, marathon_id)
     participant = await require_participant(db, current_user.id, marathon_id)
 
-    # Check active rematch event
+    # Check active game_choice event
     event = await event_service.get_active_event(db, marathon_id)
-    if not event or event.type != EventType.REMATCH.value:
+    if not event or event.type != EventType.GAME_CHOICE.value:
-        raise HTTPException(status_code=400, detail="No active rematch event")
+        raise HTTPException(status_code=400, detail="No active game choice event")
 
-    # Check no current active assignment
+    # Get the game
     result = await db.execute(
-        select(Assignment).where(
+        select(Game).where(Game.id == game_id, Game.marathon_id == marathon_id)
-            Assignment.participant_id == participant.id,
-            Assignment.status == AssignmentStatus.ACTIVE.value,
-        )
     )
-    if result.scalar_one_or_none():
+    game = result.scalar_one_or_none()
-        raise HTTPException(status_code=400, detail="You already have an active assignment")
+    if not game:
+        raise HTTPException(status_code=404, detail="Game not found")
 
-    # Get the dropped assignment
+    # Get 3 random challenges from this game
+    result = await db.execute(
+        select(Challenge)
+        .where(Challenge.game_id == game_id)
+        .order_by(func.random())
+        .limit(3)
+    )
+    challenges = result.scalars().all()
+
+    if not challenges:
+        raise HTTPException(status_code=400, detail="No challenges available for this game")
+
+    return GameChoiceChallengesResponse(
+        game_id=game.id,
+        game_title=game.title,
+        challenges=[
+            GameChoiceChallengeResponse(
+                id=c.id,
+                title=c.title,
+                description=c.description,
+                difficulty=c.difficulty,
+                points=c.points,
+                estimated_time=c.estimated_time,
+                proof_type=c.proof_type,
+                proof_hint=c.proof_hint,
+            )
+            for c in challenges
+        ],
+    )
+
+
+@router.post("/marathons/{marathon_id}/game-choice/select", response_model=MessageResponse)
+async def select_game_choice_challenge(
+    marathon_id: int,
+    data: GameChoiceSelectRequest,
+    current_user: CurrentUser,
+    db: DbSession,
+):
+    """Select a challenge during game choice event (replaces current assignment if any)"""
+    await get_marathon_or_404(db, marathon_id)
+    participant = await require_participant(db, current_user.id, marathon_id)
+
+    # Check active game_choice event
+    event = await event_service.get_active_event(db, marathon_id)
+    if not event or event.type != EventType.GAME_CHOICE.value:
+        raise HTTPException(status_code=400, detail="No active game choice event")
+
+    # Get the challenge
+    result = await db.execute(
+        select(Challenge)
+        .options(selectinload(Challenge.game))
+        .where(Challenge.id == data.challenge_id)
+    )
+    challenge = result.scalar_one_or_none()
+    if not challenge:
+        raise HTTPException(status_code=404, detail="Challenge not found")
+
+    # Verify challenge belongs to this marathon
+    if challenge.game.marathon_id != marathon_id:
+        raise HTTPException(status_code=400, detail="Challenge does not belong to this marathon")
+
+    # Check for current active assignment (non-event)
     result = await db.execute(
         select(Assignment)
         .options(selectinload(Assignment.challenge))
         .where(
-            Assignment.id == assignment_id,
             Assignment.participant_id == participant.id,
-            Assignment.status == AssignmentStatus.DROPPED.value,
+            Assignment.status == AssignmentStatus.ACTIVE.value,
+            Assignment.is_event_assignment == False,
         )
     )
-    dropped = result.scalar_one_or_none()
+    current_assignment = result.scalar_one_or_none()
-    if not dropped:
-        raise HTTPException(status_code=404, detail="Dropped assignment not found")
 
-    # Create new assignment for the same challenge (with rematch event_type for 50% points)
+    # If there's a current assignment, replace it (free drop during this event)
+    old_challenge_title = None
+    if current_assignment:
+        old_challenge_title = current_assignment.challenge.title
+        # Mark old assignment as dropped (no penalty during game_choice event)
+        current_assignment.status = AssignmentStatus.DROPPED.value
+        current_assignment.completed_at = datetime.utcnow()
+
+    # Create new assignment with chosen challenge
     new_assignment = Assignment(
         participant_id=participant.id,
-        challenge_id=dropped.challenge_id,
+        challenge_id=data.challenge_id,
         status=AssignmentStatus.ACTIVE.value,
-        event_type=EventType.REMATCH.value,
+        event_type=EventType.GAME_CHOICE.value,
     )
     db.add(new_assignment)
 
     # Log activity
+    activity_data = {
+        "game": challenge.game.title,
+        "challenge": challenge.title,
+        "event_type": EventType.GAME_CHOICE.value,
+    }
+    if old_challenge_title:
+        activity_data["replaced_challenge"] = old_challenge_title
+
     activity = Activity(
         marathon_id=marathon_id,
         user_id=current_user.id,
-        type=ActivityType.REMATCH.value,
+        type=ActivityType.SPIN.value,  # Treat as a spin activity
-        data={
+        data=activity_data,
-            "challenge": dropped.challenge.title,
-            "original_assignment_id": assignment_id,
-        },
     )
     db.add(activity)
 
     await db.commit()
 
-    return MessageResponse(message="Rematch started! Complete for 50% points")
+    if old_challenge_title:
-
+        return MessageResponse(message=f"Задание заменено! Теперь у вас: {challenge.title}")
-
+    else:
-class DroppedAssignmentResponse(BaseModel):
+        return MessageResponse(message=f"Задание выбрано: {challenge.title}")
-    id: int
-    challenge: ChallengeResponse
-    dropped_at: datetime
-
-    class Config:
-        from_attributes = True
-
-
-@router.get("/marathons/{marathon_id}/dropped-assignments", response_model=list[DroppedAssignmentResponse])
-async def get_dropped_assignments(
-    marathon_id: int,
-    current_user: CurrentUser,
-    db: DbSession,
-):
-    """Get dropped assignments that can be rematched"""
-    await get_marathon_or_404(db, marathon_id)
-    participant = await require_participant(db, current_user.id, marathon_id)
-
-    result = await db.execute(
-        select(Assignment)
-        .options(
-            selectinload(Assignment.challenge).selectinload(Challenge.game)
-        )
-        .where(
-            Assignment.participant_id == participant.id,
-            Assignment.status == AssignmentStatus.DROPPED.value,
-        )
-        .order_by(Assignment.started_at.desc())
-    )
-    dropped = result.scalars().all()
-
-    return [
-        DroppedAssignmentResponse(
-            id=a.id,
-            challenge=ChallengeResponse(
-                id=a.challenge.id,
-                title=a.challenge.title,
-                description=a.challenge.description,
-                type=a.challenge.type,
-                difficulty=a.challenge.difficulty,
-                points=a.challenge.points,
-                estimated_time=a.challenge.estimated_time,
-                proof_type=a.challenge.proof_type,
-                proof_hint=a.challenge.proof_hint,
-                game=GameShort(
-                    id=a.challenge.game.id,
-                    title=a.challenge.game.title,
-                    cover_url=None,
-                ),
-                is_generated=a.challenge.is_generated,
-                created_at=a.challenge.created_at,
-            ),
-            dropped_at=a.completed_at or a.started_at,
-        )
-        for a in dropped
-    ]
 
 
 @router.get("/marathons/{marathon_id}/swap-candidates", response_model=list[SwapCandidate])
@@ -864,3 +912,262 @@ async def get_common_enemy_leaderboard(
             )
 
     return leaderboard
+
+
+# ==================== Event Assignment Endpoints ====================
+
+
+def assignment_to_response(assignment: Assignment) -> AssignmentResponse:
+    """Convert Assignment model to AssignmentResponse"""
+    challenge = assignment.challenge
+    game = challenge.game
+    return AssignmentResponse(
+        id=assignment.id,
+        challenge=ChallengeResponse(
+            id=challenge.id,
+            title=challenge.title,
+            description=challenge.description,
+            type=challenge.type,
+            difficulty=challenge.difficulty,
+            points=challenge.points,
+            estimated_time=challenge.estimated_time,
+            proof_type=challenge.proof_type,
+            proof_hint=challenge.proof_hint,
+            game=GameShort(
+                id=game.id,
+                title=game.title,
+                cover_url=storage_service.get_url(game.cover_path, "covers"),
+            ),
+            is_generated=challenge.is_generated,
+            created_at=challenge.created_at,
+        ),
+        status=assignment.status,
+        proof_url=storage_service.get_url(assignment.proof_path, "proofs") if assignment.proof_path else assignment.proof_url,
+        proof_comment=assignment.proof_comment,
+        points_earned=assignment.points_earned,
+        streak_at_completion=assignment.streak_at_completion,
+        started_at=assignment.started_at,
+        completed_at=assignment.completed_at,
+    )
+
+
+@router.get("/marathons/{marathon_id}/event-assignment", response_model=EventAssignmentResponse)
+async def get_event_assignment(
+    marathon_id: int,
+    current_user: CurrentUser,
+    db: DbSession,
+):
+    """Get current user's event assignment (Common Enemy)"""
+    await get_marathon_or_404(db, marathon_id)
+    participant = await require_participant(db, current_user.id, marathon_id)
+
+    # Get active common enemy event
+    event = await event_service.get_active_event(db, marathon_id)
+
+    # Find event assignment for this participant
+    result = await db.execute(
+        select(Assignment)
+        .options(
+            selectinload(Assignment.challenge).selectinload(Challenge.game)
+        )
+        .where(
+            Assignment.participant_id == participant.id,
+            Assignment.is_event_assignment == True,
+        )
+        .order_by(Assignment.started_at.desc())
+    )
+    assignment = result.scalar_one_or_none()
+
+    # Check if completed
+    is_completed = assignment.status == AssignmentStatus.COMPLETED.value if assignment else False
+
+    # If no active event but we have an assignment, it might be from a past event
+    # Only return it if the event is still active
+    if not event or event.type != EventType.COMMON_ENEMY.value:
+        # Check if assignment belongs to an inactive event
+        if assignment and assignment.event_id:
+            result = await db.execute(
+                select(Event).where(Event.id == assignment.event_id)
+            )
+            assignment_event = result.scalar_one_or_none()
+            if assignment_event and not assignment_event.is_active:
+                # Event ended, don't return the assignment
+                return EventAssignmentResponse(
+                    assignment=None,
+                    event_id=None,
+                    challenge_id=None,
+                    is_completed=False,
+                )
+
+    return EventAssignmentResponse(
+        assignment=assignment_to_response(assignment) if assignment else None,
+        event_id=event.id if event else None,
+        challenge_id=event.data.get("challenge_id") if event and event.data else None,
+        is_completed=is_completed,
+    )
+
+
+@router.post("/event-assignments/{assignment_id}/complete", response_model=CompleteResult)
+async def complete_event_assignment(
+    assignment_id: int,
+    current_user: CurrentUser,
+    db: DbSession,
+    proof_url: str | None = Form(None),
+    comment: str | None = Form(None),
+    proof_file: UploadFile | None = File(None),
+):
+    """Complete an event assignment (Common Enemy) with proof"""
+    from app.services.points import PointsService
+    points_service = PointsService()
+
+    # Get assignment
+    result = await db.execute(
+        select(Assignment)
+        .options(
+            selectinload(Assignment.participant),
+            selectinload(Assignment.challenge).selectinload(Challenge.game),
+        )
+        .where(Assignment.id == assignment_id)
+    )
+    assignment = result.scalar_one_or_none()
+
+    if not assignment:
+        raise HTTPException(status_code=404, detail="Assignment not found")
+
+    if assignment.participant.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="This is not your assignment")
+
+    if assignment.status != AssignmentStatus.ACTIVE.value:
+        raise HTTPException(status_code=400, detail="Assignment is not active")
+
+    # Must be event assignment
+    if not assignment.is_event_assignment:
+        raise HTTPException(status_code=400, detail="This is not an event assignment")
+
+    # Need either file or URL
+    if not proof_file and not proof_url:
+        raise HTTPException(status_code=400, detail="Proof is required (file or URL)")
+
+    # Handle file upload
+    if proof_file:
+        contents = await proof_file.read()
+        if len(contents) > settings.MAX_UPLOAD_SIZE:
+            raise HTTPException(
+                status_code=400,
+                detail=f"File too large. Maximum size is {settings.MAX_UPLOAD_SIZE // 1024 // 1024} MB",
+            )
+
+        ext = proof_file.filename.split(".")[-1].lower() if proof_file.filename else "jpg"
+        if ext not in settings.ALLOWED_EXTENSIONS:
+            raise HTTPException(
+                status_code=400,
+                detail=f"Invalid file type. Allowed: {settings.ALLOWED_EXTENSIONS}",
+            )
+
+        # Upload file to storage
+        filename = storage_service.generate_filename(assignment_id, proof_file.filename)
+        file_path = await storage_service.upload_file(
+            content=contents,
+            folder="proofs",
+            filename=filename,
+            content_type=proof_file.content_type or "application/octet-stream",
+        )
+
+        assignment.proof_path = file_path
+    else:
+        assignment.proof_url = proof_url
+
+    assignment.proof_comment = comment
+
+    # Get marathon_id
+    marathon_id = assignment.challenge.game.marathon_id
+
+    # Get active event for bonus calculation
+    active_event = await event_service.get_active_event(db, marathon_id)
+
+    # Calculate base points (no streak bonus for event assignments)
+    participant = assignment.participant
+    challenge = assignment.challenge
+    base_points = challenge.points
+
+    # Handle common enemy bonus
+    common_enemy_bonus = 0
+    common_enemy_closed = False
+    common_enemy_winners = None
+
+    if active_event and active_event.type == EventType.COMMON_ENEMY.value:
+        common_enemy_bonus, common_enemy_closed, common_enemy_winners = await event_service.record_common_enemy_completion(
+            db, active_event, participant.id, current_user.id
+        )
+
+    total_points = base_points + common_enemy_bonus
+
+    # Update assignment
+    assignment.status = AssignmentStatus.COMPLETED.value
+    assignment.points_earned = total_points
+    assignment.completed_at = datetime.utcnow()
+
+    # Update participant points (event assignments add to total but don't affect streak)
+    participant.total_points += total_points
+
+    # Log activity
+    activity_data = {
+        "assignment_id": assignment.id,
+        "game": challenge.game.title,
+        "challenge": challenge.title,
+        "difficulty": challenge.difficulty,
+        "points": total_points,
+        "event_type": EventType.COMMON_ENEMY.value,
+        "is_event_assignment": True,
+    }
+    if common_enemy_bonus:
+        activity_data["common_enemy_bonus"] = common_enemy_bonus
+
+    activity = Activity(
+        marathon_id=marathon_id,
+        user_id=current_user.id,
+        type=ActivityType.COMPLETE.value,
+        data=activity_data,
+    )
+    db.add(activity)
+
+    # If common enemy event auto-closed, log the event end with winners
+    if common_enemy_closed and common_enemy_winners:
+        # Load winner nicknames
+        winner_user_ids = [w["user_id"] for w in common_enemy_winners]
+        users_result = await db.execute(
+            select(User).where(User.id.in_(winner_user_ids))
+        )
+        users_map = {u.id: u.nickname for u in users_result.scalars().all()}
+
+        winners_data = [
+            {
+                "user_id": w["user_id"],
+                "nickname": users_map.get(w["user_id"], "Unknown"),
+                "rank": w["rank"],
+                "bonus_points": COMMON_ENEMY_BONUSES.get(w["rank"], 0),
+            }
+            for w in common_enemy_winners
+        ]
+
+        event_end_activity = Activity(
+            marathon_id=marathon_id,
+            user_id=current_user.id,
+            type=ActivityType.EVENT_END.value,
+            data={
+                "event_type": EventType.COMMON_ENEMY.value,
+                "event_name": EVENT_INFO.get(EventType.COMMON_ENEMY, {}).get("name", "Общий враг"),
+                "auto_closed": True,
+                "winners": winners_data,
+            },
+        )
+        db.add(event_end_activity)
+
+    await db.commit()
+
+    return CompleteResult(
+        points_earned=total_points,
+        streak_bonus=0,  # Event assignments don't give streak bonus
+        total_points=participant.total_points,
+        new_streak=participant.current_streak,  # Streak unchanged
+    )

backend/app/api/v1/feed.py

@@ -3,7 +3,8 @@ from sqlalchemy import select, func
 from sqlalchemy.orm import selectinload
 
 from app.api.deps import DbSession, CurrentUser
-from app.models import Activity, Participant
+from app.models import Activity, Participant, Dispute, ActivityType
+from app.models.dispute import DisputeStatus
 from app.schemas import FeedResponse, ActivityResponse, UserPublic
 
 router = APIRouter(tags=["feed"])
@@ -44,16 +45,40 @@ async def get_feed(
     )
     activities = result.scalars().all()
 
-    items = [
+    # Get assignment_ids from complete activities to check for disputes
-        ActivityResponse(
+    complete_assignment_ids = []
-            id=a.id,
+    for a in activities:
-            type=a.type,
+        if a.type == ActivityType.COMPLETE.value and a.data and a.data.get("assignment_id"):
-            user=UserPublic.model_validate(a.user),
+            complete_assignment_ids.append(a.data["assignment_id"])
-            data=a.data,
+
-            created_at=a.created_at,
+    # Get disputes for these assignments
+    disputes_map: dict[int, str] = {}
+    if complete_assignment_ids:
+        result = await db.execute(
+            select(Dispute).where(Dispute.assignment_id.in_(complete_assignment_ids))
+        )
+        for dispute in result.scalars().all():
+            disputes_map[dispute.assignment_id] = dispute.status
+
+    items = []
+    for a in activities:
+        data = dict(a.data) if a.data else {}
+
+        # Add dispute status to complete activities
+        if a.type == ActivityType.COMPLETE.value and a.data and a.data.get("assignment_id"):
+            assignment_id = a.data["assignment_id"]
+            if assignment_id in disputes_map:
+                data["dispute_status"] = disputes_map[assignment_id]
+
+        items.append(
+            ActivityResponse(
+                id=a.id,
+                type=a.type,
+                user=UserPublic.model_validate(a.user),
+                data=data if data else None,
+                created_at=a.created_at,
+            )
         )
-        for a in activities
-    ]
 
     return FeedResponse(
         items=items,

backend/app/api/v1/games.py

@@ -1,8 +1,6 @@
 from fastapi import APIRouter, HTTPException, status, UploadFile, File, Query
 from sqlalchemy import select, func
 from sqlalchemy.orm import selectinload
-import uuid
-from pathlib import Path
 
 from app.api.deps import (
     DbSession, CurrentUser,
@@ -11,6 +9,7 @@ from app.api.deps import (
 from app.core.config import settings
 from app.models import Marathon, MarathonStatus, GameProposalMode, Game, GameStatus, Challenge, Activity, ActivityType
 from app.schemas import GameCreate, GameUpdate, GameResponse, MessageResponse, UserPublic
+from app.services.storage import storage_service
 
 router = APIRouter(tags=["games"])
 
@@ -35,7 +34,7 @@ def game_to_response(game: Game, challenges_count: int = 0) -> GameResponse:
     return GameResponse(
         id=game.id,
         title=game.title,
-        cover_url=f"/uploads/covers/{game.cover_path.split('/')[-1]}" if game.cover_path else None,
+        cover_url=storage_service.get_url(game.cover_path, "covers"),
         download_url=game.download_url,
         genre=game.genre,
         status=game.status,
@@ -354,15 +353,20 @@ async def upload_cover(
             detail=f"Invalid file type. Allowed: {settings.ALLOWED_IMAGE_EXTENSIONS}",
         )
 
-    # Save file
+    # Delete old cover if exists
-    filename = f"{game_id}_{uuid.uuid4().hex}.{ext}"
+    if game.cover_path:
-    filepath = Path(settings.UPLOAD_DIR) / "covers" / filename
+        await storage_service.delete_file(game.cover_path)
-    filepath.parent.mkdir(parents=True, exist_ok=True)
 
-    with open(filepath, "wb") as f:
+    # Upload file
-        f.write(contents)
+    filename = storage_service.generate_filename(game_id, file.filename)
+    file_path = await storage_service.upload_file(
+        content=contents,
+        folder="covers",
+        filename=filename,
+        content_type=file.content_type or "image/jpeg",
+    )
 
-    game.cover_path = str(filepath)
+    game.cover_path = file_path
     await db.commit()
 
     return await get_game(game_id, current_user, db)

backend/app/api/v1/marathons.py

@@ -27,6 +27,7 @@ from app.schemas import (
     UserPublic,
     SetParticipantRole,
 )
+from app.services.telegram_notifier import telegram_notifier
 
 router = APIRouter(prefix="/marathons", tags=["marathons"])
 
@@ -294,6 +295,9 @@ async def start_marathon(marathon_id: int, current_user: CurrentUser, db: DbSess
 
     await db.commit()
 
+    # Send Telegram notifications
+    await telegram_notifier.notify_marathon_start(db, marathon_id, marathon.title)
+
     return await get_marathon(marathon_id, current_user, db)
 
 
@@ -319,6 +323,9 @@ async def finish_marathon(marathon_id: int, current_user: CurrentUser, db: DbSes
 
     await db.commit()
 
+    # Send Telegram notifications
+    await telegram_notifier.notify_marathon_finish(db, marathon_id, marathon.title)
+
     return await get_marathon(marathon_id, current_user, db)
 
 

backend/app/api/v1/telegram.py

@@ -0,0 +1,393 @@
+import logging
+
+from fastapi import APIRouter
+from pydantic import BaseModel
+from sqlalchemy import select, func
+from sqlalchemy.orm import selectinload
+
+from app.api.deps import DbSession, CurrentUser
+from app.core.config import settings
+from app.core.security import create_telegram_link_token, verify_telegram_link_token
+from app.models import User, Participant, Marathon, Assignment, Challenge, Event, Game
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/telegram", tags=["telegram"])
+
+
+# Schemas
+class TelegramLinkToken(BaseModel):
+    token: str
+    bot_url: str
+
+
+class TelegramConfirmLink(BaseModel):
+    token: str
+    telegram_id: int
+    telegram_username: str | None = None
+    telegram_first_name: str | None = None
+    telegram_last_name: str | None = None
+    telegram_avatar_url: str | None = None
+
+
+class TelegramLinkResponse(BaseModel):
+    success: bool
+    nickname: str | None = None
+    error: str | None = None
+
+
+class TelegramUserResponse(BaseModel):
+    id: int
+    nickname: str
+    login: str
+    avatar_url: str | None = None
+
+    class Config:
+        from_attributes = True
+
+
+class TelegramMarathonResponse(BaseModel):
+    id: int
+    title: str
+    status: str
+    total_points: int
+    position: int
+
+    class Config:
+        from_attributes = True
+
+
+class TelegramMarathonDetails(BaseModel):
+    marathon: dict
+    participant: dict
+    position: int
+    active_events: list[dict]
+    current_assignment: dict | None
+
+
+class TelegramStatsResponse(BaseModel):
+    marathons_completed: int
+    marathons_active: int
+    challenges_completed: int
+    total_points: int
+    best_streak: int
+
+
+# Endpoints
+@router.post("/generate-link-token", response_model=TelegramLinkToken)
+async def generate_link_token(current_user: CurrentUser):
+    """Generate a one-time token for Telegram account linking."""
+    logger.info(f"[TG_LINK] Generating link token for user {current_user.id} ({current_user.nickname})")
+
+    # Create a short token (≤64 chars) for Telegram deep link
+    token = create_telegram_link_token(
+        user_id=current_user.id,
+        expire_minutes=settings.TELEGRAM_LINK_TOKEN_EXPIRE_MINUTES
+    )
+    logger.info(f"[TG_LINK] Token created: {token} (length: {len(token)})")
+
+    bot_username = settings.TELEGRAM_BOT_USERNAME or "GameMarathonBot"
+    bot_url = f"https://t.me/{bot_username}?start={token}"
+    logger.info(f"[TG_LINK] Bot URL: {bot_url}")
+
+    return TelegramLinkToken(token=token, bot_url=bot_url)
+
+
+@router.post("/confirm-link", response_model=TelegramLinkResponse)
+async def confirm_telegram_link(data: TelegramConfirmLink, db: DbSession):
+    """Confirm Telegram account linking (called by bot)."""
+    logger.info(f"[TG_CONFIRM] ========== CONFIRM LINK REQUEST ==========")
+    logger.info(f"[TG_CONFIRM] telegram_id: {data.telegram_id}")
+    logger.info(f"[TG_CONFIRM] telegram_username: {data.telegram_username}")
+    logger.info(f"[TG_CONFIRM] token: {data.token}")
+
+    # Verify short token and extract user_id
+    user_id = verify_telegram_link_token(data.token)
+    logger.info(f"[TG_CONFIRM] Verified user_id: {user_id}")
+
+    if user_id is None:
+        logger.error(f"[TG_CONFIRM] FAILED: Token invalid or expired")
+        return TelegramLinkResponse(success=False, error="Ссылка недействительна или устарела")
+
+    # Get user
+    result = await db.execute(select(User).where(User.id == user_id))
+    user = result.scalar_one_or_none()
+    logger.info(f"[TG_CONFIRM] Found user: {user.nickname if user else 'NOT FOUND'}")
+
+    if not user:
+        logger.error(f"[TG_CONFIRM] FAILED: User not found")
+        return TelegramLinkResponse(success=False, error="Пользователь не найден")
+
+    # Check if telegram_id already linked to another user
+    result = await db.execute(
+        select(User).where(User.telegram_id == data.telegram_id, User.id != user_id)
+    )
+    existing_user = result.scalar_one_or_none()
+    if existing_user:
+        logger.error(f"[TG_CONFIRM] FAILED: Telegram already linked to user {existing_user.id}")
+        return TelegramLinkResponse(
+            success=False,
+            error="Этот Telegram аккаунт уже привязан к другому пользователю"
+        )
+
+    # Link account
+    logger.info(f"[TG_CONFIRM] Linking telegram_id={data.telegram_id} to user_id={user_id}")
+    user.telegram_id = data.telegram_id
+    user.telegram_username = data.telegram_username
+    user.telegram_first_name = data.telegram_first_name
+    user.telegram_last_name = data.telegram_last_name
+    user.telegram_avatar_url = data.telegram_avatar_url
+
+    await db.commit()
+    logger.info(f"[TG_CONFIRM] SUCCESS! User {user.nickname} linked to Telegram {data.telegram_id}")
+
+    return TelegramLinkResponse(success=True, nickname=user.nickname)
+
+
+@router.get("/user/{telegram_id}", response_model=TelegramUserResponse | None)
+async def get_user_by_telegram_id(telegram_id: int, db: DbSession):
+    """Get user by Telegram ID."""
+    logger.info(f"[TG_USER] Looking up user by telegram_id={telegram_id}")
+
+    result = await db.execute(
+        select(User).where(User.telegram_id == telegram_id)
+    )
+    user = result.scalar_one_or_none()
+
+    if not user:
+        logger.info(f"[TG_USER] No user found for telegram_id={telegram_id}")
+        return None
+
+    logger.info(f"[TG_USER] Found user: {user.id} ({user.nickname})")
+    return TelegramUserResponse(
+        id=user.id,
+        nickname=user.nickname,
+        login=user.login,
+        avatar_url=user.avatar_url
+    )
+
+
+@router.post("/unlink/{telegram_id}", response_model=TelegramLinkResponse)
+async def unlink_telegram(telegram_id: int, db: DbSession):
+    """Unlink Telegram account."""
+    result = await db.execute(
+        select(User).where(User.telegram_id == telegram_id)
+    )
+    user = result.scalar_one_or_none()
+
+    if not user:
+        return TelegramLinkResponse(success=False, error="Аккаунт не найден")
+
+    user.telegram_id = None
+    user.telegram_username = None
+
+    await db.commit()
+
+    return TelegramLinkResponse(success=True)
+
+
+@router.get("/marathons/{telegram_id}", response_model=list[TelegramMarathonResponse])
+async def get_user_marathons(telegram_id: int, db: DbSession):
+    """Get user's marathons by Telegram ID."""
+    # Get user
+    result = await db.execute(
+        select(User).where(User.telegram_id == telegram_id)
+    )
+    user = result.scalar_one_or_none()
+
+    if not user:
+        return []
+
+    # Get participations with marathons
+    result = await db.execute(
+        select(Participant, Marathon)
+        .join(Marathon, Participant.marathon_id == Marathon.id)
+        .where(Participant.user_id == user.id)
+        .order_by(Marathon.created_at.desc())
+    )
+    participations = result.all()
+
+    marathons = []
+    for participant, marathon in participations:
+        # Calculate position
+        position_result = await db.execute(
+            select(func.count(Participant.id) + 1)
+            .where(
+                Participant.marathon_id == marathon.id,
+                Participant.total_points > participant.total_points
+            )
+        )
+        position = position_result.scalar() or 1
+
+        marathons.append(TelegramMarathonResponse(
+            id=marathon.id,
+            title=marathon.title,
+            status=marathon.status.value if hasattr(marathon.status, 'value') else marathon.status,
+            total_points=participant.total_points,
+            position=position
+        ))
+
+    return marathons
+
+
+@router.get("/marathon/{marathon_id}", response_model=TelegramMarathonDetails | None)
+async def get_marathon_details(marathon_id: int, telegram_id: int, db: DbSession):
+    """Get marathon details for user by Telegram ID."""
+    # Get user
+    result = await db.execute(
+        select(User).where(User.telegram_id == telegram_id)
+    )
+    user = result.scalar_one_or_none()
+
+    if not user:
+        return None
+
+    # Get marathon
+    result = await db.execute(
+        select(Marathon).where(Marathon.id == marathon_id)
+    )
+    marathon = result.scalar_one_or_none()
+
+    if not marathon:
+        return None
+
+    # Get participant
+    result = await db.execute(
+        select(Participant)
+        .where(Participant.marathon_id == marathon_id, Participant.user_id == user.id)
+    )
+    participant = result.scalar_one_or_none()
+
+    if not participant:
+        return None
+
+    # Calculate position
+    position_result = await db.execute(
+        select(func.count(Participant.id) + 1)
+        .where(
+            Participant.marathon_id == marathon_id,
+            Participant.total_points > participant.total_points
+        )
+    )
+    position = position_result.scalar() or 1
+
+    # Get active events
+    result = await db.execute(
+        select(Event)
+        .where(Event.marathon_id == marathon_id, Event.is_active == True)
+    )
+    active_events = result.scalars().all()
+
+    events_data = [
+        {
+            "id": e.id,
+            "type": e.type.value if hasattr(e.type, 'value') else e.type,
+            "start_time": e.start_time.isoformat() if e.start_time else None,
+            "end_time": e.end_time.isoformat() if e.end_time else None
+        }
+        for e in active_events
+    ]
+
+    # Get current assignment
+    result = await db.execute(
+        select(Assignment)
+        .options(
+            selectinload(Assignment.challenge).selectinload(Challenge.game)
+        )
+        .where(
+            Assignment.participant_id == participant.id,
+            Assignment.status == "active"
+        )
+        .order_by(Assignment.started_at.desc())
+        .limit(1)
+    )
+    assignment = result.scalar_one_or_none()
+
+    assignment_data = None
+    if assignment:
+        challenge = assignment.challenge
+        game = challenge.game if challenge else None
+        assignment_data = {
+            "id": assignment.id,
+            "status": assignment.status.value if hasattr(assignment.status, 'value') else assignment.status,
+            "challenge": {
+                "id": challenge.id if challenge else None,
+                "title": challenge.title if challenge else None,
+                "difficulty": challenge.difficulty.value if challenge and hasattr(challenge.difficulty, 'value') else (challenge.difficulty if challenge else None),
+                "points": challenge.points if challenge else None,
+                "game": {
+                    "id": game.id if game else None,
+                    "title": game.title if game else None
+                }
+            } if challenge else None
+        }
+
+    return TelegramMarathonDetails(
+        marathon={
+            "id": marathon.id,
+            "title": marathon.title,
+            "status": marathon.status.value if hasattr(marathon.status, 'value') else marathon.status,
+            "description": marathon.description
+        },
+        participant={
+            "total_points": participant.total_points,
+            "current_streak": participant.current_streak,
+            "drop_count": participant.drop_count
+        },
+        position=position,
+        active_events=events_data,
+        current_assignment=assignment_data
+    )
+
+
+@router.get("/stats/{telegram_id}", response_model=TelegramStatsResponse | None)
+async def get_user_stats(telegram_id: int, db: DbSession):
+    """Get user's overall statistics by Telegram ID."""
+    # Get user
+    result = await db.execute(
+        select(User).where(User.telegram_id == telegram_id)
+    )
+    user = result.scalar_one_or_none()
+
+    if not user:
+        return None
+
+    # Get participations
+    result = await db.execute(
+        select(Participant, Marathon)
+        .join(Marathon, Participant.marathon_id == Marathon.id)
+        .where(Participant.user_id == user.id)
+    )
+    participations = result.all()
+
+    marathons_completed = 0
+    marathons_active = 0
+    total_points = 0
+    best_streak = 0
+
+    for participant, marathon in participations:
+        status = marathon.status.value if hasattr(marathon.status, 'value') else marathon.status
+        if status == "finished":
+            marathons_completed += 1
+        elif status == "active":
+            marathons_active += 1
+
+        total_points += participant.total_points
+        if participant.current_streak > best_streak:
+            best_streak = participant.current_streak
+
+    # Count completed assignments
+    result = await db.execute(
+        select(func.count(Assignment.id))
+        .join(Participant, Assignment.participant_id == Participant.id)
+        .where(Participant.user_id == user.id, Assignment.status == "completed")
+    )
+    challenges_completed = result.scalar() or 0
+
+    return TelegramStatsResponse(
+        marathons_completed=marathons_completed,
+        marathons_active=marathons_active,
+        challenges_completed=challenges_completed,
+        total_points=total_points,
+        best_streak=best_streak
+    )

backend/app/api/v1/users.py

@@ -1,12 +1,11 @@
 from fastapi import APIRouter, HTTPException, status, UploadFile, File
 from sqlalchemy import select
-import uuid
-from pathlib import Path
 
 from app.api.deps import DbSession, CurrentUser
 from app.core.config import settings
 from app.models import User
 from app.schemas import UserPublic, UserUpdate, TelegramLink, MessageResponse
+from app.services.storage import storage_service
 
 router = APIRouter(prefix="/users", tags=["users"])
 
@@ -64,16 +63,21 @@ async def upload_avatar(
             detail=f"Invalid file type. Allowed: {settings.ALLOWED_IMAGE_EXTENSIONS}",
         )
 
-    # Save file
+    # Delete old avatar if exists
-    filename = f"{current_user.id}_{uuid.uuid4().hex}.{ext}"
+    if current_user.avatar_path:
-    filepath = Path(settings.UPLOAD_DIR) / "avatars" / filename
+        await storage_service.delete_file(current_user.avatar_path)
-    filepath.parent.mkdir(parents=True, exist_ok=True)
 
-    with open(filepath, "wb") as f:
+    # Upload file
-        f.write(contents)
+    filename = storage_service.generate_filename(current_user.id, file.filename)
+    file_path = await storage_service.upload_file(
+        content=contents,
+        folder="avatars",
+        filename=filename,
+        content_type=file.content_type or "image/jpeg",
+    )
 
     # Update user
-    current_user.avatar_path = str(filepath)
+    current_user.avatar_path = file_path
     await db.commit()
     await db.refresh(current_user)
 
@@ -102,3 +106,22 @@ async def link_telegram(
     await db.commit()
 
     return MessageResponse(message="Telegram account linked successfully")
+
+
+@router.post("/me/telegram/unlink", response_model=MessageResponse)
+async def unlink_telegram(
+    current_user: CurrentUser,
+    db: DbSession,
+):
+    if not current_user.telegram_id:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Telegram account is not linked",
+        )
+
+    current_user.telegram_id = None
+    current_user.telegram_username = None
+
+    await db.commit()
+
+    return MessageResponse(message="Telegram account unlinked successfully")

backend/app/api/v1/wheel.py

@@ -3,15 +3,13 @@ from datetime import datetime
 from fastapi import APIRouter, HTTPException, UploadFile, File, Form
 from sqlalchemy import select, func
 from sqlalchemy.orm import selectinload
-import uuid
-from pathlib import Path
 
 from app.api.deps import DbSession, CurrentUser
 from app.core.config import settings
 from app.models import (
     Marathon, MarathonStatus, Game, Challenge, Participant,
     Assignment, AssignmentStatus, Activity, ActivityType,
-    EventType, Difficulty
+    EventType, Difficulty, User
 )
 from app.schemas import (
     SpinResult, AssignmentResponse, CompleteResult, DropResult,
@@ -19,6 +17,7 @@ from app.schemas import (
 )
 from app.services.points import PointsService
 from app.services.events import event_service
+from app.services.storage import storage_service
 
 router = APIRouter(tags=["wheel"])
 
@@ -38,7 +37,14 @@ async def get_participant_or_403(db, user_id: int, marathon_id: int) -> Particip
     return participant
 
 
-async def get_active_assignment(db, participant_id: int) -> Assignment | None:
+async def get_active_assignment(db, participant_id: int, is_event: bool = False) -> Assignment | None:
+    """Get active assignment for participant.
+
+    Args:
+        db: Database session
+        participant_id: Participant ID
+        is_event: If True, get event assignment (Common Enemy). If False, get regular assignment.
+    """
     result = await db.execute(
         select(Assignment)
         .options(
@@ -47,11 +53,45 @@ async def get_active_assignment(db, participant_id: int) -> Assignment | None:
         .where(
             Assignment.participant_id == participant_id,
             Assignment.status == AssignmentStatus.ACTIVE.value,
+            Assignment.is_event_assignment == is_event,
         )
     )
     return result.scalar_one_or_none()
 
 
+async def get_oldest_returned_assignment(db, participant_id: int) -> Assignment | None:
+    """Get the oldest returned assignment that needs to be redone."""
+    result = await db.execute(
+        select(Assignment)
+        .options(
+            selectinload(Assignment.challenge).selectinload(Challenge.game)
+        )
+        .where(
+            Assignment.participant_id == participant_id,
+            Assignment.status == AssignmentStatus.RETURNED.value,
+            Assignment.is_event_assignment == False,
+        )
+        .order_by(Assignment.completed_at.asc())  # Oldest first
+        .limit(1)
+    )
+    return result.scalar_one_or_none()
+
+
+async def activate_returned_assignment(db, returned_assignment: Assignment) -> None:
+    """
+    Re-activate a returned assignment.
+    Simply changes the status back to ACTIVE.
+    """
+    returned_assignment.status = AssignmentStatus.ACTIVE.value
+    returned_assignment.started_at = datetime.utcnow()
+    # Clear previous proof data for fresh attempt
+    returned_assignment.proof_path = None
+    returned_assignment.proof_url = None
+    returned_assignment.proof_comment = None
+    returned_assignment.completed_at = None
+    returned_assignment.points_earned = 0
+
+
 @router.post("/marathons/{marathon_id}/spin", response_model=SpinResult)
 async def spin_wheel(marathon_id: int, current_user: CurrentUser, db: DbSession):
     """Spin the wheel to get a random game and challenge"""
@@ -64,10 +104,14 @@ async def spin_wheel(marathon_id: int, current_user: CurrentUser, db: DbSession)
     if marathon.status != MarathonStatus.ACTIVE.value:
         raise HTTPException(status_code=400, detail="Marathon is not active")
 
+    # Check if marathon has expired by end_date
+    if marathon.end_date and datetime.utcnow() > marathon.end_date:
+        raise HTTPException(status_code=400, detail="Marathon has ended")
+
     participant = await get_participant_or_403(db, current_user.id, marathon_id)
 
-    # Check no active assignment
+    # Check no active regular assignment (event assignments are separate)
-    active = await get_active_assignment(db, participant.id)
+    active = await get_active_assignment(db, participant.id, is_event=False)
     if active:
         raise HTTPException(status_code=400, detail="You already have an active assignment")
 
@@ -77,7 +121,7 @@ async def spin_wheel(marathon_id: int, current_user: CurrentUser, db: DbSession)
     game = None
     challenge = None
 
-    # Handle special event cases
+    # Handle special event cases (excluding Common Enemy - it has separate flow)
     if active_event:
         if active_event.type == EventType.JACKPOT.value:
             # Jackpot: Get hard challenge only
@@ -90,17 +134,7 @@ async def spin_wheel(marathon_id: int, current_user: CurrentUser, db: DbSession)
                 game = result.scalar_one_or_none()
                 # Consume jackpot (one-time use)
                 await event_service.consume_jackpot(db, active_event.id)
-
+        # Note: Common Enemy is handled separately via event-assignment endpoints
-        elif active_event.type == EventType.COMMON_ENEMY.value:
-            # Common enemy: Everyone gets same challenge (if not already completed)
-            event_data = active_event.data or {}
-            completions = event_data.get("completions", [])
-            already_completed = any(c["participant_id"] == participant.id for c in completions)
-
-            if not already_completed:
-                challenge = await event_service.get_common_enemy_challenge(db, active_event)
-                if challenge:
-                    game = challenge.game
 
     # Normal random selection if no special event handling
     if not game or not challenge:
@@ -130,6 +164,8 @@ async def spin_wheel(marathon_id: int, current_user: CurrentUser, db: DbSession)
     activity_data = {
         "game": game.title,
         "challenge": challenge.title,
+        "difficulty": challenge.difficulty,
+        "points": challenge.points,
     }
     if active_event:
         activity_data["event_type"] = active_event.type
@@ -146,7 +182,7 @@ async def spin_wheel(marathon_id: int, current_user: CurrentUser, db: DbSession)
     await db.refresh(assignment)
 
     # Calculate drop penalty (considers active event for double_risk)
-    drop_penalty = points_service.calculate_drop_penalty(participant.drop_count, active_event)
+    drop_penalty = points_service.calculate_drop_penalty(participant.drop_count, challenge.points, active_event)
 
     # Get challenges count (avoid lazy loading in async context)
     challenges_count = 0
@@ -162,7 +198,7 @@ async def spin_wheel(marathon_id: int, current_user: CurrentUser, db: DbSession)
         game=GameResponse(
             id=game.id,
             title=game.title,
-            cover_url=f"/uploads/covers/{game.cover_path.split('/')[-1]}" if game.cover_path else None,
+            cover_url=storage_service.get_url(game.cover_path, "covers"),
             download_url=game.download_url,
             genre=game.genre,
             added_by=None,
@@ -190,9 +226,9 @@ async def spin_wheel(marathon_id: int, current_user: CurrentUser, db: DbSession)
 
 @router.get("/marathons/{marathon_id}/current-assignment", response_model=AssignmentResponse | None)
 async def get_current_assignment(marathon_id: int, current_user: CurrentUser, db: DbSession):
-    """Get current active assignment"""
+    """Get current active regular assignment (not event assignments)"""
     participant = await get_participant_or_403(db, current_user.id, marathon_id)
-    assignment = await get_active_assignment(db, participant.id)
+    assignment = await get_active_assignment(db, participant.id, is_event=False)
 
     if not assignment:
         return None
@@ -200,6 +236,10 @@ async def get_current_assignment(marathon_id: int, current_user: CurrentUser, db
     challenge = assignment.challenge
     game = challenge.game
 
+    # Calculate drop penalty (considers active event for double_risk)
+    active_event = await event_service.get_active_event(db, marathon_id)
+    drop_penalty = points_service.calculate_drop_penalty(participant.drop_count, challenge.points, active_event)
+
     return AssignmentResponse(
         id=assignment.id,
         challenge=ChallengeResponse(
@@ -217,12 +257,13 @@ async def get_current_assignment(marathon_id: int, current_user: CurrentUser, db
             created_at=challenge.created_at,
         ),
         status=assignment.status,
-        proof_url=f"/uploads/proofs/{assignment.proof_path.split('/')[-1]}" if assignment.proof_path else assignment.proof_url,
+        proof_url=storage_service.get_url(assignment.proof_path, "proofs") if assignment.proof_path else assignment.proof_url,
         proof_comment=assignment.proof_comment,
         points_earned=assignment.points_earned,
         streak_at_completion=assignment.streak_at_completion,
         started_at=assignment.started_at,
         completed_at=assignment.completed_at,
+        drop_penalty=drop_penalty,
     )
 
 
@@ -235,7 +276,7 @@ async def complete_assignment(
     comment: str | None = Form(None),
     proof_file: UploadFile | None = File(None),
 ):
-    """Complete an assignment with proof"""
+    """Complete a regular assignment with proof (not event assignments)"""
     # Get assignment
     result = await db.execute(
         select(Assignment)
@@ -256,6 +297,10 @@ async def complete_assignment(
     if assignment.status != AssignmentStatus.ACTIVE.value:
         raise HTTPException(status_code=400, detail="Assignment is not active")
 
+    # Event assignments should be completed via /event-assignments/{id}/complete
+    if assignment.is_event_assignment:
+        raise HTTPException(status_code=400, detail="Use /event-assignments/{id}/complete for event assignments")
+
     # Need either file or URL
     if not proof_file and not proof_url:
         raise HTTPException(status_code=400, detail="Proof is required (file or URL)")
@@ -276,14 +321,16 @@ async def complete_assignment(
                 detail=f"Invalid file type. Allowed: {settings.ALLOWED_EXTENSIONS}",
             )
 
-        filename = f"{assignment_id}_{uuid.uuid4().hex}.{ext}"
+        # Upload file to storage
-        filepath = Path(settings.UPLOAD_DIR) / "proofs" / filename
+        filename = storage_service.generate_filename(assignment_id, proof_file.filename)
-        filepath.parent.mkdir(parents=True, exist_ok=True)
+        file_path = await storage_service.upload_file(
+            content=contents,
+            folder="proofs",
+            filename=filename,
+            content_type=proof_file.content_type or "application/octet-stream",
+        )
 
-        with open(filepath, "wb") as f:
+        assignment.proof_path = file_path
-            f.write(contents)
-
-        assignment.proof_path = str(filepath)
     else:
         assignment.proof_url = proof_url
 
@@ -303,12 +350,12 @@ async def complete_assignment(
     # Check active event for point multipliers
     active_event = await event_service.get_active_event(db, marathon_id)
 
-    # For jackpot/rematch: use the event_type stored in assignment (since event may be over)
+    # For jackpot: use the event_type stored in assignment (since event may be over)
     # For other events: use the currently active event
     effective_event = active_event
 
-    # Handle assignment-level event types (jackpot, rematch)
+    # Handle assignment-level event types (jackpot)
-    if assignment.event_type in [EventType.JACKPOT.value, EventType.REMATCH.value]:
+    if assignment.event_type == EventType.JACKPOT.value:
         # Create a mock event object for point calculation
         class MockEvent:
             def __init__(self, event_type):
@@ -328,6 +375,7 @@ async def complete_assignment(
             db, active_event, participant.id, current_user.id
         )
         total_points += common_enemy_bonus
+        print(f"[COMMON_ENEMY] bonus={common_enemy_bonus}, closed={common_enemy_closed}, winners={common_enemy_winners}")
 
     # Update assignment
     assignment.status = AssignmentStatus.COMPLETED.value
@@ -342,12 +390,15 @@ async def complete_assignment(
 
     # Log activity
     activity_data = {
+        "assignment_id": assignment.id,
+        "game": full_challenge.game.title,
         "challenge": challenge.title,
+        "difficulty": challenge.difficulty,
         "points": total_points,
         "streak": participant.current_streak,
     }
-    # Log event info (use assignment's event_type for jackpot/rematch, active_event for others)
+    # Log event info (use assignment's event_type for jackpot, active_event for others)
-    if assignment.event_type in [EventType.JACKPOT.value, EventType.REMATCH.value]:
+    if assignment.event_type == EventType.JACKPOT.value:
         activity_data["event_type"] = assignment.event_type
         activity_data["event_bonus"] = event_bonus
     elif active_event:
@@ -367,6 +418,24 @@ async def complete_assignment(
     # If common enemy event auto-closed, log the event end with winners
     if common_enemy_closed and common_enemy_winners:
         from app.schemas.event import EVENT_INFO, COMMON_ENEMY_BONUSES
+        # Load winner nicknames
+        winner_user_ids = [w["user_id"] for w in common_enemy_winners]
+        users_result = await db.execute(
+            select(User).where(User.id.in_(winner_user_ids))
+        )
+        users_map = {u.id: u.nickname for u in users_result.scalars().all()}
+
+        winners_data = [
+            {
+                "user_id": w["user_id"],
+                "nickname": users_map.get(w["user_id"], "Unknown"),
+                "rank": w["rank"],
+                "bonus_points": COMMON_ENEMY_BONUSES.get(w["rank"], 0),
+            }
+            for w in common_enemy_winners
+        ]
+        print(f"[COMMON_ENEMY] Creating event_end activity with winners: {winners_data}")
+
         event_end_activity = Activity(
             marathon_id=marathon_id,
             user_id=current_user.id,  # Last completer triggers the close
@@ -375,20 +444,20 @@ async def complete_assignment(
                 "event_type": EventType.COMMON_ENEMY.value,
                 "event_name": EVENT_INFO.get(EventType.COMMON_ENEMY, {}).get("name", "Общий враг"),
                 "auto_closed": True,
-                "winners": [
+                "winners": winners_data,
-                    {
-                        "user_id": w["user_id"],
-                        "rank": w["rank"],
-                        "bonus_points": COMMON_ENEMY_BONUSES.get(w["rank"], 0),
-                    }
-                    for w in common_enemy_winners
-                ],
             },
         )
         db.add(event_end_activity)
 
     await db.commit()
 
+    # Check for returned assignments and activate the oldest one
+    returned_assignment = await get_oldest_returned_assignment(db, participant.id)
+    if returned_assignment:
+        await activate_returned_assignment(db, returned_assignment)
+        await db.commit()
+        print(f"[WHEEL] Auto-activated returned assignment {returned_assignment.id} for participant {participant.id}")
+
     return CompleteResult(
         points_earned=total_points,
         streak_bonus=streak_bonus,
@@ -427,7 +496,7 @@ async def drop_assignment(assignment_id: int, current_user: CurrentUser, db: DbS
     active_event = await event_service.get_active_event(db, marathon_id)
 
     # Calculate penalty (0 if double_risk event is active)
-    penalty = points_service.calculate_drop_penalty(participant.drop_count, active_event)
+    penalty = points_service.calculate_drop_penalty(participant.drop_count, assignment.challenge.points, active_event)
 
     # Update assignment
     assignment.status = AssignmentStatus.DROPPED.value
@@ -440,7 +509,9 @@ async def drop_assignment(assignment_id: int, current_user: CurrentUser, db: DbS
 
     # Log activity
     activity_data = {
+        "game": assignment.challenge.game.title,
         "challenge": assignment.challenge.title,
+        "difficulty": assignment.challenge.difficulty,
         "penalty": penalty,
     }
     if active_event:
@@ -510,7 +581,7 @@ async def get_my_history(
                 created_at=a.challenge.created_at,
             ),
             status=a.status,
-            proof_url=f"/uploads/proofs/{a.proof_path.split('/')[-1]}" if a.proof_path else a.proof_url,
+            proof_url=storage_service.get_url(a.proof_path, "proofs") if a.proof_path else a.proof_url,
             proof_comment=a.proof_comment,
             points_earned=a.points_earned,
             streak_at_completion=a.streak_at_completion,

backend/app/core/config.py

@@ -20,13 +20,25 @@ class Settings(BaseSettings):
 
     # Telegram
     TELEGRAM_BOT_TOKEN: str = ""
+    TELEGRAM_BOT_USERNAME: str = ""
+    TELEGRAM_LINK_TOKEN_EXPIRE_MINUTES: int = 10
 
     # Uploads
     UPLOAD_DIR: str = "uploads"
-    MAX_UPLOAD_SIZE: int = 15 * 1024 * 1024  # 15 MB
+    MAX_IMAGE_SIZE: int = 15 * 1024 * 1024  # 15 MB
+    MAX_VIDEO_SIZE: int = 30 * 1024 * 1024  # 30 MB
     ALLOWED_IMAGE_EXTENSIONS: set = {"jpg", "jpeg", "png", "gif", "webp"}
     ALLOWED_VIDEO_EXTENSIONS: set = {"mp4", "webm", "mov"}
 
+    # S3 Storage (FirstVDS)
+    S3_ENABLED: bool = False
+    S3_BUCKET_NAME: str = ""
+    S3_REGION: str = "ru-1"
+    S3_ACCESS_KEY_ID: str = ""
+    S3_SECRET_ACCESS_KEY: str = ""
+    S3_ENDPOINT_URL: str = ""
+    S3_PUBLIC_URL: str = ""
+
     @property
     def ALLOWED_EXTENSIONS(self) -> set:
         return self.ALLOWED_IMAGE_EXTENSIONS | self.ALLOWED_VIDEO_EXTENSIONS

backend/app/core/security.py

@@ -1,3 +1,8 @@
+import base64
+import hashlib
+import hmac
+import struct
+import time
 from datetime import datetime, timedelta
 from typing import Any
 
@@ -35,3 +40,71 @@ def decode_access_token(token: str) -> dict | None:
         return payload
     except jwt.JWTError:
         return None
+
+
+def create_telegram_link_token(user_id: int, expire_minutes: int = 10) -> str:
+    """
+    Create a short token for Telegram account linking.
+    Format: base64url encoded binary data (no separators).
+    Structure: user_id (4 bytes) + expire_at (4 bytes) + signature (8 bytes) = 16 bytes -> 22 chars base64url.
+    """
+    expire_at = int(time.time()) + (expire_minutes * 60)
+
+    # Pack user_id and expire_at as unsigned 32-bit integers (8 bytes total)
+    data = struct.pack(">II", user_id, expire_at)
+
+    # Create HMAC signature (take first 8 bytes)
+    signature = hmac.new(
+        settings.SECRET_KEY.encode(),
+        data,
+        hashlib.sha256
+    ).digest()[:8]
+
+    # Combine data + signature (16 bytes)
+    token_bytes = data + signature
+
+    # Encode as base64url without padding
+    token = base64.urlsafe_b64encode(token_bytes).decode().rstrip("=")
+
+    return token
+
+
+def verify_telegram_link_token(token: str) -> int | None:
+    """
+    Verify Telegram link token and return user_id if valid.
+    Returns None if token is invalid or expired.
+    """
+    try:
+        # Add padding if needed for base64 decoding
+        padding = 4 - (len(token) % 4)
+        if padding != 4:
+            token += "=" * padding
+
+        token_bytes = base64.urlsafe_b64decode(token)
+
+        if len(token_bytes) != 16:
+            return None
+
+        # Unpack data
+        data = token_bytes[:8]
+        provided_signature = token_bytes[8:]
+
+        user_id, expire_at = struct.unpack(">II", data)
+
+        # Check expiration
+        if time.time() > expire_at:
+            return None
+
+        # Verify signature
+        expected_signature = hmac.new(
+            settings.SECRET_KEY.encode(),
+            data,
+            hashlib.sha256
+        ).digest()[:8]
+
+        if not hmac.compare_digest(provided_signature, expected_signature):
+            return None
+
+        return user_id
+    except (ValueError, struct.error, Exception):
+        return None

backend/app/main.py

@@ -9,6 +9,7 @@ from app.core.config import settings
 from app.core.database import engine, Base, async_session_maker
 from app.api.v1 import router as api_router
 from app.services.event_scheduler import event_scheduler
+from app.services.dispute_scheduler import dispute_scheduler
 
 
 @asynccontextmanager
@@ -23,13 +24,15 @@ async def lifespan(app: FastAPI):
     (upload_dir / "covers").mkdir(parents=True, exist_ok=True)
     (upload_dir / "proofs").mkdir(parents=True, exist_ok=True)
 
-    # Start event scheduler
+    # Start schedulers
     await event_scheduler.start(async_session_maker)
+    await dispute_scheduler.start(async_session_maker)
 
     yield
 
     # Shutdown
     await event_scheduler.stop()
+    await dispute_scheduler.stop()
     await engine.dispose()
 
 

backend/app/models/__init__.py

@@ -7,6 +7,7 @@ from app.models.assignment import Assignment, AssignmentStatus
 from app.models.activity import Activity, ActivityType
 from app.models.event import Event, EventType
 from app.models.swap_request import SwapRequest, SwapRequestStatus
+from app.models.dispute import Dispute, DisputeStatus, DisputeComment, DisputeVote
 
 __all__ = [
     "User",
@@ -30,4 +31,8 @@ __all__ = [
     "EventType",
     "SwapRequest",
     "SwapRequestStatus",
+    "Dispute",
+    "DisputeStatus",
+    "DisputeComment",
+    "DisputeVote",
 ]

backend/app/models/activity.py

@@ -19,7 +19,7 @@ class ActivityType(str, Enum):
     EVENT_START = "event_start"
     EVENT_END = "event_end"
     SWAP = "swap"
-    REMATCH = "rematch"
+    GAME_CHOICE = "game_choice"
 
 
 class Activity(Base):

backend/app/models/assignment.py

@@ -1,6 +1,6 @@
 from datetime import datetime
 from enum import Enum
-from sqlalchemy import String, Text, DateTime, ForeignKey, Integer
+from sqlalchemy import String, Text, DateTime, ForeignKey, Integer, Boolean
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.core.database import Base
@@ -10,6 +10,7 @@ class AssignmentStatus(str, Enum):
     ACTIVE = "active"
     COMPLETED = "completed"
     DROPPED = "dropped"
+    RETURNED = "returned"  # Disputed and needs to be redone
 
 
 class Assignment(Base):
@@ -20,6 +21,8 @@ class Assignment(Base):
     challenge_id: Mapped[int] = mapped_column(ForeignKey("challenges.id", ondelete="CASCADE"))
     status: Mapped[str] = mapped_column(String(20), default=AssignmentStatus.ACTIVE.value)
     event_type: Mapped[str | None] = mapped_column(String(30), nullable=True)  # Event type when assignment was created
+    is_event_assignment: Mapped[bool] = mapped_column(Boolean, default=False, index=True)  # True for Common Enemy assignments
+    event_id: Mapped[int | None] = mapped_column(ForeignKey("events.id", ondelete="SET NULL"), nullable=True, index=True)  # Link to event
     proof_path: Mapped[str | None] = mapped_column(String(500), nullable=True)
     proof_url: Mapped[str | None] = mapped_column(Text, nullable=True)
     proof_comment: Mapped[str | None] = mapped_column(Text, nullable=True)
@@ -31,3 +34,5 @@ class Assignment(Base):
     # Relationships
     participant: Mapped["Participant"] = relationship("Participant", back_populates="assignments")
     challenge: Mapped["Challenge"] = relationship("Challenge", back_populates="assignments")
+    event: Mapped["Event | None"] = relationship("Event", back_populates="assignments")
+    dispute: Mapped["Dispute | None"] = relationship("Dispute", back_populates="assignment", uselist=False)

backend/app/models/dispute.py

@@ -0,0 +1,66 @@
+from datetime import datetime
+from enum import Enum
+from sqlalchemy import String, Text, DateTime, ForeignKey, Boolean, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.core.database import Base
+
+
+class DisputeStatus(str, Enum):
+    OPEN = "open"
+    RESOLVED_VALID = "valid"
+    RESOLVED_INVALID = "invalid"
+
+
+class Dispute(Base):
+    """Dispute against a completed assignment's proof"""
+    __tablename__ = "disputes"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    assignment_id: Mapped[int] = mapped_column(ForeignKey("assignments.id", ondelete="CASCADE"), unique=True, index=True)
+    raised_by_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"))
+    reason: Mapped[str] = mapped_column(Text, nullable=False)
+    status: Mapped[str] = mapped_column(String(20), default=DisputeStatus.OPEN.value)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    resolved_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+
+    # Relationships
+    assignment: Mapped["Assignment"] = relationship("Assignment", back_populates="dispute")
+    raised_by: Mapped["User"] = relationship("User", foreign_keys=[raised_by_id])
+    comments: Mapped[list["DisputeComment"]] = relationship("DisputeComment", back_populates="dispute", cascade="all, delete-orphan")
+    votes: Mapped[list["DisputeVote"]] = relationship("DisputeVote", back_populates="dispute", cascade="all, delete-orphan")
+
+
+class DisputeComment(Base):
+    """Comment in a dispute discussion"""
+    __tablename__ = "dispute_comments"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    dispute_id: Mapped[int] = mapped_column(ForeignKey("disputes.id", ondelete="CASCADE"), index=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"))
+    text: Mapped[str] = mapped_column(Text, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    dispute: Mapped["Dispute"] = relationship("Dispute", back_populates="comments")
+    user: Mapped["User"] = relationship("User")
+
+
+class DisputeVote(Base):
+    """Vote in a dispute (valid or invalid)"""
+    __tablename__ = "dispute_votes"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    dispute_id: Mapped[int] = mapped_column(ForeignKey("disputes.id", ondelete="CASCADE"), index=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"))
+    vote: Mapped[bool] = mapped_column(Boolean, nullable=False)  # True = valid, False = invalid
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Unique constraint: one vote per user per dispute
+    __table_args__ = (
+        UniqueConstraint("dispute_id", "user_id", name="uq_dispute_vote_user"),
+    )
+
+    # Relationships
+    dispute: Mapped["Dispute"] = relationship("Dispute", back_populates="votes")
+    user: Mapped["User"] = relationship("User")

backend/app/models/event.py

@@ -12,7 +12,7 @@ class EventType(str, Enum):
     DOUBLE_RISK = "double_risk"      # дропы бесплатны, x0.5 очков
     JACKPOT = "jackpot"              # x3 за сложный челлендж
     SWAP = "swap"                    # обмен заданиями
-    REMATCH = "rematch"              # реванш проваленного
+    GAME_CHOICE = "game_choice"      # выбор игры (2-3 челленджа на выбор)
 
 
 class Event(Base):
@@ -37,3 +37,4 @@ class Event(Base):
     # Relationships
     marathon: Mapped["Marathon"] = relationship("Marathon", back_populates="events")
     created_by: Mapped["User | None"] = relationship("User")
+    assignments: Mapped[list["Assignment"]] = relationship("Assignment", back_populates="event")

backend/app/models/user.py

@@ -21,6 +21,9 @@ class User(Base):
     avatar_path: Mapped[str | None] = mapped_column(String(500), nullable=True)
     telegram_id: Mapped[int | None] = mapped_column(BigInteger, unique=True, nullable=True)
     telegram_username: Mapped[str | None] = mapped_column(String(50), nullable=True)
+    telegram_first_name: Mapped[str | None] = mapped_column(String(100), nullable=True)
+    telegram_last_name: Mapped[str | None] = mapped_column(String(100), nullable=True)
+    telegram_avatar_url: Mapped[str | None] = mapped_column(String(500), nullable=True)
     role: Mapped[str] = mapped_column(String(20), default=UserRole.USER.value)
     created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
 
@@ -52,5 +55,7 @@ class User(Base):
     @property
     def avatar_url(self) -> str | None:
         if self.avatar_path:
-            return f"/uploads/avatars/{self.avatar_path.split('/')[-1]}"
+            # Lazy import to avoid circular dependency
+            from app.services.storage import storage_service
+            return storage_service.get_url(self.avatar_path, "avatars")
         return None

backend/app/schemas/__init__.py

@@ -41,6 +41,7 @@ from app.schemas.assignment import (
     SpinResult,
     CompleteResult,
     DropResult,
+    EventAssignmentResponse,
 )
 from app.schemas.activity import (
     ActivityResponse,
@@ -66,6 +67,16 @@ from app.schemas.common import (
     ErrorResponse,
     PaginationParams,
 )
+from app.schemas.dispute import (
+    DisputeCreate,
+    DisputeCommentCreate,
+    DisputeVoteCreate,
+    DisputeCommentResponse,
+    DisputeVoteResponse,
+    DisputeResponse,
+    AssignmentDetailResponse,
+    ReturnedAssignmentResponse,
+)
 
 __all__ = [
     # User
@@ -107,6 +118,7 @@ __all__ = [
     "SpinResult",
     "CompleteResult",
     "DropResult",
+    "EventAssignmentResponse",
     # Activity
     "ActivityResponse",
     "FeedResponse",
@@ -128,4 +140,13 @@ __all__ = [
     "MessageResponse",
     "ErrorResponse",
     "PaginationParams",
+    # Dispute
+    "DisputeCreate",
+    "DisputeCommentCreate",
+    "DisputeVoteCreate",
+    "DisputeCommentResponse",
+    "DisputeVoteResponse",
+    "DisputeResponse",
+    "AssignmentDetailResponse",
+    "ReturnedAssignmentResponse",
 ]

backend/app/schemas/assignment.py

@@ -24,6 +24,7 @@ class AssignmentResponse(BaseModel):
     streak_at_completion: int | None = None
     started_at: datetime
     completed_at: datetime | None = None
+    drop_penalty: int = 0  # Calculated penalty if dropped
 
     class Config:
         from_attributes = True
@@ -48,3 +49,14 @@ class DropResult(BaseModel):
     penalty: int
     total_points: int
     new_drop_count: int
+
+
+class EventAssignmentResponse(BaseModel):
+    """Response for event-specific assignment (Common Enemy)"""
+    assignment: AssignmentResponse | None
+    event_id: int | None
+    challenge_id: int | None
+    is_completed: bool
+
+    class Config:
+        from_attributes = True

backend/app/schemas/dispute.py

@@ -0,0 +1,91 @@
+from datetime import datetime
+from pydantic import BaseModel, Field
+
+from app.schemas.user import UserPublic
+from app.schemas.challenge import ChallengeResponse
+
+
+class DisputeCreate(BaseModel):
+    """Request to create a dispute"""
+    reason: str = Field(..., min_length=10, max_length=1000)
+
+
+class DisputeCommentCreate(BaseModel):
+    """Request to add a comment to a dispute"""
+    text: str = Field(..., min_length=1, max_length=500)
+
+
+class DisputeVoteCreate(BaseModel):
+    """Request to vote on a dispute"""
+    vote: bool  # True = valid (proof is OK), False = invalid (proof is not OK)
+
+
+class DisputeCommentResponse(BaseModel):
+    """Comment in a dispute discussion"""
+    id: int
+    user: UserPublic
+    text: str
+    created_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class DisputeVoteResponse(BaseModel):
+    """Vote in a dispute"""
+    user: UserPublic
+    vote: bool  # True = valid, False = invalid
+    created_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class DisputeResponse(BaseModel):
+    """Full dispute information"""
+    id: int
+    raised_by: UserPublic
+    reason: str
+    status: str  # "open", "valid", "invalid"
+    comments: list[DisputeCommentResponse]
+    votes: list[DisputeVoteResponse]
+    votes_valid: int
+    votes_invalid: int
+    my_vote: bool | None  # Current user's vote, None if not voted
+    expires_at: datetime
+    created_at: datetime
+    resolved_at: datetime | None
+
+    class Config:
+        from_attributes = True
+
+
+class AssignmentDetailResponse(BaseModel):
+    """Detailed assignment information with proofs and dispute"""
+    id: int
+    challenge: ChallengeResponse
+    participant: UserPublic
+    status: str
+    proof_url: str | None  # External URL (YouTube, etc.)
+    proof_image_url: str | None  # Uploaded file URL
+    proof_comment: str | None
+    points_earned: int
+    streak_at_completion: int | None
+    started_at: datetime
+    completed_at: datetime | None
+    can_dispute: bool  # True if <24h since completion and not own assignment
+    dispute: DisputeResponse | None
+
+    class Config:
+        from_attributes = True
+
+
+class ReturnedAssignmentResponse(BaseModel):
+    """Returned assignment that needs to be redone"""
+    id: int
+    challenge: ChallengeResponse
+    original_completed_at: datetime
+    dispute_reason: str
+
+    class Config:
+        from_attributes = True

backend/app/schemas/event.py

@@ -13,7 +13,7 @@ EventTypeLiteral = Literal[
     "double_risk",
     "jackpot",
     "swap",
-    "rematch",
+    "game_choice",
 ]
 
 
@@ -32,7 +32,7 @@ class EventCreate(BaseModel):
 class EventEffects(BaseModel):
     points_multiplier: float = 1.0
     drop_free: bool = False
-    special_action: str | None = None  # "swap", "rematch"
+    special_action: str | None = None  # "swap", "game_choice"
     description: str = ""
 
 
@@ -85,7 +85,7 @@ EVENT_INFO = {
         "drop_free": False,
     },
     EventType.DOUBLE_RISK: {
-        "name": "Двойной риск",
+        "name": "Безопасная игра",
         "description": "Дропы бесплатны, но очки x0.5",
         "default_duration": 120,
         "points_multiplier": 0.5,
@@ -106,13 +106,13 @@ EVENT_INFO = {
         "drop_free": False,
         "special_action": "swap",
     },
-    EventType.REMATCH: {
+    EventType.GAME_CHOICE: {
-        "name": "Реванш",
+        "name": "Выбор игры",
-        "description": "Можно переделать проваленный челлендж за 50% очков",
+        "description": "Выбери игру и один из 3 челленджей. Можно заменить текущее задание без штрафа!",
-        "default_duration": 240,
+        "default_duration": 120,
-        "points_multiplier": 0.5,
+        "points_multiplier": 1.0,
-        "drop_free": False,
+        "drop_free": True,  # Free replacement of current assignment
-        "special_action": "rematch",
+        "special_action": "game_choice",
     },
 }
 

backend/app/schemas/user.py

@@ -33,6 +33,11 @@ class UserPublic(UserBase):
     login: str
     avatar_url: str | None = None
     role: str = "user"
+    telegram_id: int | None = None
+    telegram_username: str | None = None
+    telegram_first_name: str | None = None
+    telegram_last_name: str | None = None
+    telegram_avatar_url: str | None = None
     created_at: datetime
 
     class Config:

backend/app/services/dispute_scheduler.py

@@ -0,0 +1,89 @@
+"""
+Dispute Scheduler for automatic dispute resolution after 24 hours.
+"""
+import asyncio
+from datetime import datetime, timedelta
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.orm import selectinload
+
+from app.models import Dispute, DisputeStatus, Assignment, AssignmentStatus
+from app.services.disputes import dispute_service
+
+
+# Configuration
+CHECK_INTERVAL_SECONDS = 300  # Check every 5 minutes
+DISPUTE_WINDOW_HOURS = 24  # Disputes auto-resolve after 24 hours
+
+
+class DisputeScheduler:
+    """Background scheduler for automatic dispute resolution."""
+
+    def __init__(self):
+        self._running = False
+        self._task: asyncio.Task | None = None
+
+    async def start(self, session_factory) -> None:
+        """Start the scheduler background task."""
+        if self._running:
+            return
+
+        self._running = True
+        self._task = asyncio.create_task(self._run_loop(session_factory))
+        print("[DisputeScheduler] Started")
+
+    async def stop(self) -> None:
+        """Stop the scheduler."""
+        self._running = False
+        if self._task:
+            self._task.cancel()
+            try:
+                await self._task
+            except asyncio.CancelledError:
+                pass
+        print("[DisputeScheduler] Stopped")
+
+    async def _run_loop(self, session_factory) -> None:
+        """Main scheduler loop."""
+        while self._running:
+            try:
+                async with session_factory() as db:
+                    await self._process_expired_disputes(db)
+            except Exception as e:
+                print(f"[DisputeScheduler] Error in loop: {e}")
+
+            await asyncio.sleep(CHECK_INTERVAL_SECONDS)
+
+    async def _process_expired_disputes(self, db: AsyncSession) -> None:
+        """Process and resolve expired disputes."""
+        cutoff_time = datetime.utcnow() - timedelta(hours=DISPUTE_WINDOW_HOURS)
+
+        # Find all open disputes that have expired
+        result = await db.execute(
+            select(Dispute)
+            .options(
+                selectinload(Dispute.votes),
+                selectinload(Dispute.assignment).selectinload(Assignment.participant),
+            )
+            .where(
+                Dispute.status == DisputeStatus.OPEN.value,
+                Dispute.created_at < cutoff_time,
+            )
+        )
+        expired_disputes = result.scalars().all()
+
+        for dispute in expired_disputes:
+            try:
+                result_status, votes_valid, votes_invalid = await dispute_service.resolve_dispute(
+                    db, dispute.id
+                )
+                print(
+                    f"[DisputeScheduler] Auto-resolved dispute {dispute.id}: "
+                    f"{result_status} (valid: {votes_valid}, invalid: {votes_invalid})"
+                )
+            except Exception as e:
+                print(f"[DisputeScheduler] Failed to resolve dispute {dispute.id}: {e}")
+
+
+# Global scheduler instance
+dispute_scheduler = DisputeScheduler()

backend/app/services/disputes.py

@@ -0,0 +1,149 @@
+"""
+Dispute resolution service.
+"""
+from datetime import datetime
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.orm import selectinload
+
+from app.models import (
+    Dispute, DisputeStatus, DisputeVote,
+    Assignment, AssignmentStatus, Participant, Marathon, Challenge, Game,
+)
+from app.services.telegram_notifier import telegram_notifier
+
+
+class DisputeService:
+    """Service for dispute resolution logic"""
+
+    async def resolve_dispute(self, db: AsyncSession, dispute_id: int) -> tuple[str, int, int]:
+        """
+        Resolve a dispute based on votes.
+
+        Returns:
+            Tuple of (result_status, votes_valid, votes_invalid)
+        """
+        # Get dispute with votes and assignment
+        result = await db.execute(
+            select(Dispute)
+            .options(
+                selectinload(Dispute.votes),
+                selectinload(Dispute.assignment).selectinload(Assignment.participant),
+            )
+            .where(Dispute.id == dispute_id)
+        )
+        dispute = result.scalar_one_or_none()
+
+        if not dispute:
+            raise ValueError(f"Dispute {dispute_id} not found")
+
+        if dispute.status != DisputeStatus.OPEN.value:
+            raise ValueError(f"Dispute {dispute_id} is already resolved")
+
+        # Count votes
+        votes_valid = sum(1 for v in dispute.votes if v.vote is True)
+        votes_invalid = sum(1 for v in dispute.votes if v.vote is False)
+
+        # Determine result: tie goes to the accused (valid)
+        if votes_invalid > votes_valid:
+            # Proof is invalid - mark assignment as RETURNED
+            result_status = DisputeStatus.RESOLVED_INVALID.value
+            await self._handle_invalid_proof(db, dispute)
+        else:
+            # Proof is valid (or tie)
+            result_status = DisputeStatus.RESOLVED_VALID.value
+
+        # Update dispute
+        dispute.status = result_status
+        dispute.resolved_at = datetime.utcnow()
+
+        await db.commit()
+
+        # Send Telegram notification about dispute resolution
+        await self._notify_dispute_resolved(db, dispute, result_status == DisputeStatus.RESOLVED_INVALID.value)
+
+        return result_status, votes_valid, votes_invalid
+
+    async def _notify_dispute_resolved(
+        self,
+        db: AsyncSession,
+        dispute: Dispute,
+        is_valid: bool
+    ) -> None:
+        """Send notification about dispute resolution to the assignment owner."""
+        try:
+            # Get assignment with challenge and marathon info
+            result = await db.execute(
+                select(Assignment)
+                .options(
+                    selectinload(Assignment.participant),
+                    selectinload(Assignment.challenge).selectinload(Challenge.game)
+                )
+                .where(Assignment.id == dispute.assignment_id)
+            )
+            assignment = result.scalar_one_or_none()
+            if not assignment:
+                return
+
+            participant = assignment.participant
+            challenge = assignment.challenge
+            game = challenge.game if challenge else None
+
+            # Get marathon
+            result = await db.execute(
+                select(Marathon).where(Marathon.id == game.marathon_id if game else 0)
+            )
+            marathon = result.scalar_one_or_none()
+
+            if marathon and participant:
+                await telegram_notifier.notify_dispute_resolved(
+                    db,
+                    user_id=participant.user_id,
+                    marathon_title=marathon.title,
+                    challenge_title=challenge.title if challenge else "Unknown",
+                    is_valid=is_valid
+                )
+        except Exception as e:
+            print(f"[DisputeService] Failed to send notification: {e}")
+
+    async def _handle_invalid_proof(self, db: AsyncSession, dispute: Dispute) -> None:
+        """
+        Handle the case when proof is determined to be invalid.
+
+        - Mark assignment as RETURNED
+        - Subtract points from participant
+        - Reset streak if it was affected
+        """
+        assignment = dispute.assignment
+        participant = assignment.participant
+
+        # Subtract points that were earned
+        points_to_subtract = assignment.points_earned
+        participant.total_points = max(0, participant.total_points - points_to_subtract)
+
+        # Reset assignment
+        assignment.status = AssignmentStatus.RETURNED.value
+        assignment.points_earned = 0
+        # Keep proof data so it can be reviewed
+
+        print(f"[DisputeService] Assignment {assignment.id} marked as RETURNED, "
+              f"subtracted {points_to_subtract} points from participant {participant.id}")
+
+    async def get_pending_disputes(self, db: AsyncSession, older_than_hours: int = 24) -> list[Dispute]:
+        """Get all open disputes older than specified hours"""
+        from datetime import timedelta
+
+        cutoff_time = datetime.utcnow() - timedelta(hours=older_than_hours)
+
+        result = await db.execute(
+            select(Dispute)
+            .where(
+                Dispute.status == DisputeStatus.OPEN.value,
+                Dispute.created_at < cutoff_time,
+            )
+        )
+        return list(result.scalars().all())
+
+
+# Global service instance
+dispute_service = DisputeService()

backend/app/services/event_scheduler.py

@@ -21,7 +21,7 @@ AUTO_EVENT_TYPES = [
     EventType.GOLDEN_HOUR,
     EventType.DOUBLE_RISK,
     EventType.JACKPOT,
-    EventType.REMATCH,
+    EventType.GAME_CHOICE,
 ]
 
 

backend/app/services/events.py

@@ -4,8 +4,9 @@ from sqlalchemy.orm import selectinload
 from sqlalchemy.orm.attributes import flag_modified
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from app.models import Event, EventType, Marathon, Challenge, Difficulty
+from app.models import Event, EventType, Marathon, Challenge, Difficulty, Participant, Assignment, AssignmentStatus
 from app.schemas.event import EventEffects, EVENT_INFO, COMMON_ENEMY_BONUSES
+from app.services.telegram_notifier import telegram_notifier
 
 
 class EventService:
@@ -76,6 +77,12 @@ class EventService:
             data=data if data else None,
         )
         db.add(event)
+        await db.flush()  # Get event.id before committing
+
+        # Auto-assign challenge to all participants for Common Enemy
+        if event_type == EventType.COMMON_ENEMY.value and challenge_id:
+            await self._assign_common_enemy_to_all(db, marathon_id, event.id, challenge_id)
+
         await db.commit()
         await db.refresh(event)
 
@@ -83,18 +90,81 @@ class EventService:
         if created_by_id:
             await db.refresh(event, ["created_by"])
 
+        # Send Telegram notifications
+        result = await db.execute(select(Marathon).where(Marathon.id == marathon_id))
+        marathon = result.scalar_one_or_none()
+        if marathon:
+            await telegram_notifier.notify_event_start(
+                db, marathon_id, event_type, marathon.title
+            )
+
         return event
 
+    async def _assign_common_enemy_to_all(
+        self,
+        db: AsyncSession,
+        marathon_id: int,
+        event_id: int,
+        challenge_id: int,
+    ) -> None:
+        """Create event assignments for all participants in the marathon"""
+        # Get all participants
+        result = await db.execute(
+            select(Participant).where(Participant.marathon_id == marathon_id)
+        )
+        participants = result.scalars().all()
+
+        # Create event assignment for each participant
+        for participant in participants:
+            assignment = Assignment(
+                participant_id=participant.id,
+                challenge_id=challenge_id,
+                status=AssignmentStatus.ACTIVE.value,
+                event_type=EventType.COMMON_ENEMY.value,
+                is_event_assignment=True,
+                event_id=event_id,
+            )
+            db.add(assignment)
+
     async def end_event(self, db: AsyncSession, event_id: int) -> None:
-        """End an event"""
+        """End an event and mark incomplete event assignments as expired"""
+        from sqlalchemy import update
+
         result = await db.execute(select(Event).where(Event.id == event_id))
         event = result.scalar_one_or_none()
         if event:
+            event_type = event.type
+            marathon_id = event.marathon_id
+
             event.is_active = False
             if not event.end_time:
                 event.end_time = datetime.utcnow()
+
+            # Mark all incomplete event assignments for this event as dropped
+            if event.type == EventType.COMMON_ENEMY.value:
+                await db.execute(
+                    update(Assignment)
+                    .where(
+                        Assignment.event_id == event_id,
+                        Assignment.is_event_assignment == True,
+                        Assignment.status == AssignmentStatus.ACTIVE.value,
+                    )
+                    .values(
+                        status=AssignmentStatus.DROPPED.value,
+                        completed_at=datetime.utcnow(),
+                    )
+                )
+
             await db.commit()
 
+            # Send Telegram notifications about event end
+            result = await db.execute(select(Marathon).where(Marathon.id == marathon_id))
+            marathon = result.scalar_one_or_none()
+            if marathon:
+                await telegram_notifier.notify_event_end(
+                    db, marathon_id, event_type, marathon.title
+                )
+
     async def consume_jackpot(self, db: AsyncSession, event_id: int) -> None:
         """Consume jackpot event after one spin"""
         await self.end_event(db, event_id)
@@ -157,13 +227,16 @@ class EventService:
         - winners_list: list of winners if event closed, None otherwise
         """
         if event.type != EventType.COMMON_ENEMY.value:
+            print(f"[COMMON_ENEMY] Event type mismatch: {event.type}")
             return 0, False, None
 
         data = event.data or {}
         completions = data.get("completions", [])
+        print(f"[COMMON_ENEMY] Current completions count: {len(completions)}")
 
         # Check if already completed
         if any(c["participant_id"] == participant_id for c in completions):
+            print(f"[COMMON_ENEMY] Participant {participant_id} already completed")
             return 0, False, None
 
         # Add completion
@@ -174,6 +247,7 @@ class EventService:
             "completed_at": datetime.utcnow().isoformat(),
             "rank": rank,
         })
+        print(f"[COMMON_ENEMY] Added completion for user {user_id}, rank={rank}")
 
         # Update event data - need to flag_modified for SQLAlchemy to detect JSON changes
         event.data = {**data, "completions": completions}
@@ -189,6 +263,7 @@ class EventService:
             event.end_time = datetime.utcnow()
             event_closed = True
             winners_list = completions[:3]  # Top 3
+            print(f"[COMMON_ENEMY] Event auto-closed! Winners: {winners_list}")
 
         await db.commit()
 

backend/app/services/gpt.py

@@ -28,33 +28,43 @@ class GPTService:
         """
         genre_text = f" (жанр: {game_genre})" if game_genre else ""
 
-        prompt = f"""Для видеоигры "{game_title}"{genre_text} сгенерируй 6 челленджей для игрового марафона.
+        prompt = f"""Ты — эксперт по видеоиграм. Сгенерируй 6 КОНКРЕТНЫХ челленджей для игры "{game_title}"{genre_text}.
 
-Требования:
+ВАЖНО: Челленджи должны быть СПЕЦИФИЧНЫМИ для этой игры!
-- 2 лёгких челленджа (15-30 минут игры)
+- Используй РЕАЛЬНЫЕ названия локаций, боссов, персонажей, миссий, уровней из игры
-- 2 средних челленджа (1-2 часа игры)
+- Основывайся на том, какие челленджи РЕАЛЬНО делают игроки в этой игре (спидраны, no-hit боссов, сбор коллекционных предметов и т.д.)
-- 2 сложных челленджа (3+ часов или высокая сложность)
+- НЕ генерируй абстрактные челленджи типа "пройди уровень" или "убей 10 врагов"
 
-Для каждого челленджа укажи:
+Примеры ХОРОШИХ челленджей:
-- title: короткое название на русском (до 50 символов)
+- Dark Souls: "Победи Орнштейна и Смоуга без призыва" / "Пройди Чумной город без отравления"
-- description: что нужно сделать на русском (1-2 предложения)
+- GTA V: "Получи золото в миссии «Ювелирное дело»" / "Выиграй уличную гонку на Vinewood"
-- type: один из [completion, no_death, speedrun, collection, achievement, challenge_run]
+- Hollow Knight: "Победи Хорнет без получения урона" / "Найди все грибные споры в Грибных пустошах"
-- difficulty: easy/medium/hard
+- Minecraft: "Убей Дракона Края за один визит в Энд" / "Построй работающую ферму железа"
-- points: очки (easy: 30-50, medium: 60-100, hard: 120-200)
-- estimated_time: примерное время в минутах
-- proof_type: screenshot/video/steam (что лучше подойдёт для проверки)
-- proof_hint: что должно быть на скриншоте/видео для подтверждения на русском
 
-Ответь ТОЛЬКО валидным JSON объектом с ключом "challenges" содержащим массив челленджей.
+Требования по сложности:
-Пример формата:
+- 2 лёгких (15-30 мин): простые задачи, знакомство с игрой
+- 2 средних (1-2 часа): требуют навыка или исследования
+- 2 сложных (3+ часа): серьёзный челлендж, достижения, полное прохождение
+
+Формат ответа — JSON:
+- title: название на русском (до 50 символов), конкретное и понятное
+- description: что именно сделать (1-2 предложения), с деталями из игры
+- type: completion | no_death | speedrun | collection | achievement | challenge_run
+- difficulty: easy | medium | hard
+- points: easy=20-40, medium=45-75, hard=90-150
+- estimated_time: время в минутах
+- proof_type: screenshot | video | steam
+- proof_hint: ЧТО КОНКРЕТНО должно быть видно на скриншоте/видео (экран победы, достижение, локация и т.д.)
+
+Ответь ТОЛЬКО JSON:
 {{"challenges": [{{"title": "...", "description": "...", "type": "...", "difficulty": "...", "points": 50, "estimated_time": 30, "proof_type": "...", "proof_hint": "..."}}]}}"""
 
         response = await self.client.chat.completions.create(
-            model="gpt-4o-mini",
+            model="gpt-5-mini",
             messages=[{"role": "user", "content": prompt}],
             response_format={"type": "json_object"},
-            temperature=0.7,
+            temperature=0.8,
-            max_tokens=2000,
+            max_tokens=2500,
         )
 
         content = response.choices[0].message.content
@@ -77,10 +87,17 @@ class GPTService:
             if proof_type not in ["screenshot", "video", "steam"]:
                 proof_type = "screenshot"
 
-            # Validate points
+            # Validate points based on difficulty
-            points = ch.get("points", 50)
+            points = ch.get("points", 30)
             if not isinstance(points, int) or points < 1:
-                points = 50
+                points = 30
+            # Clamp points to expected ranges
+            if difficulty == "easy":
+                points = max(20, min(40, points))
+            elif difficulty == "medium":
+                points = max(45, min(75, points))
+            elif difficulty == "hard":
+                points = max(90, min(150, points))
 
             challenges.append(ChallengeGenerated(
                 title=ch.get("title", "Unnamed Challenge")[:100],

backend/app/services/points.py

@@ -13,19 +13,19 @@ class PointsService:
     }
     MAX_STREAK_MULTIPLIER = 0.4
 
-    DROP_PENALTIES = {
+    # Drop penalty as percentage of challenge points
-        0: 0,    # First drop is free
+    DROP_PENALTY_PERCENTAGES = {
-        1: 10,
+        0: 0.5,   # 1st drop: 50%
-        2: 25,
+        1: 0.75,  # 2nd drop: 75%
     }
-    MAX_DROP_PENALTY = 50
+    MAX_DROP_PENALTY_PERCENTAGE = 1.0  # 3rd+ drop: 100%
 
     # Event point multipliers
     EVENT_MULTIPLIERS = {
         EventType.GOLDEN_HOUR.value: 1.5,
         EventType.DOUBLE_RISK.value: 0.5,
         EventType.JACKPOT.value: 3.0,
-        EventType.REMATCH.value: 0.5,
+        # GAME_CHOICE uses 1.0 multiplier (default)
     }
 
     def calculate_completion_points(
@@ -66,6 +66,7 @@ class PointsService:
     def calculate_drop_penalty(
         self,
         consecutive_drops: int,
+        challenge_points: int,
         event: Event | None = None
     ) -> int:
         """
@@ -73,6 +74,7 @@ class PointsService:
 
         Args:
             consecutive_drops: Number of drops since last completion
+            challenge_points: Base points of the challenge being dropped
             event: Active event (optional)
 
         Returns:
@@ -82,10 +84,11 @@ class PointsService:
         if event and event.type == EventType.DOUBLE_RISK.value:
             return 0
 
-        return self.DROP_PENALTIES.get(
+        penalty_percentage = self.DROP_PENALTY_PERCENTAGES.get(
             consecutive_drops,
-            self.MAX_DROP_PENALTY
+            self.MAX_DROP_PENALTY_PERCENTAGE
         )
+        return int(challenge_points * penalty_percentage)
 
     def apply_event_multiplier(self, base_points: int, event: Event | None) -> int:
         """Apply event multiplier to points"""

backend/app/services/storage.py

@@ -0,0 +1,269 @@
+"""
+Storage service for file uploads.
+Supports both local filesystem and S3-compatible storage (FirstVDS).
+"""
+import logging
+import uuid
+from pathlib import Path
+from typing import Literal
+
+import boto3
+from botocore.exceptions import ClientError, BotoCoreError
+from botocore.config import Config
+
+from app.core.config import settings
+
+logger = logging.getLogger(__name__)
+
+StorageFolder = Literal["avatars", "covers", "proofs"]
+
+
+class StorageService:
+    """Unified storage service with S3 and local filesystem support."""
+
+    def __init__(self):
+        self._s3_client = None
+
+    @property
+    def s3_client(self):
+        """Lazy initialization of S3 client."""
+        if self._s3_client is None and settings.S3_ENABLED:
+            logger.info(f"Initializing S3 client: endpoint={settings.S3_ENDPOINT_URL}, bucket={settings.S3_BUCKET_NAME}")
+            try:
+                # Use signature_version=s3v4 for S3-compatible storage
+                self._s3_client = boto3.client(
+                    "s3",
+                    endpoint_url=settings.S3_ENDPOINT_URL,
+                    aws_access_key_id=settings.S3_ACCESS_KEY_ID,
+                    aws_secret_access_key=settings.S3_SECRET_ACCESS_KEY,
+                    region_name=settings.S3_REGION or "us-east-1",
+                    config=Config(signature_version="s3v4"),
+                )
+                logger.info("S3 client initialized successfully")
+            except Exception as e:
+                logger.error(f"Failed to initialize S3 client: {e}")
+                self._s3_client = None
+        return self._s3_client
+
+    def generate_filename(self, prefix: str | int, original_filename: str | None) -> str:
+        """Generate unique filename with prefix."""
+        ext = "jpg"
+        if original_filename and "." in original_filename:
+            ext = original_filename.rsplit(".", 1)[-1].lower()
+        return f"{prefix}_{uuid.uuid4().hex}.{ext}"
+
+    async def upload_file(
+        self,
+        content: bytes,
+        folder: StorageFolder,
+        filename: str,
+        content_type: str = "application/octet-stream",
+    ) -> str:
+        """
+        Upload file to storage.
+
+        Returns:
+            Path/key to the uploaded file (relative path for local, S3 key for S3)
+        """
+        if settings.S3_ENABLED:
+            try:
+                return await self._upload_to_s3(content, folder, filename, content_type)
+            except Exception as e:
+                logger.error(f"S3 upload failed, falling back to local: {e}")
+                return await self._upload_to_local(content, folder, filename)
+        else:
+            return await self._upload_to_local(content, folder, filename)
+
+    async def _upload_to_s3(
+        self,
+        content: bytes,
+        folder: StorageFolder,
+        filename: str,
+        content_type: str,
+    ) -> str:
+        """Upload file to S3."""
+        key = f"{folder}/{filename}"
+
+        if not self.s3_client:
+            raise RuntimeError("S3 client not initialized")
+
+        try:
+            logger.info(f"Uploading to S3: bucket={settings.S3_BUCKET_NAME}, key={key}")
+            self.s3_client.put_object(
+                Bucket=settings.S3_BUCKET_NAME,
+                Key=key,
+                Body=content,
+                ContentType=content_type,
+            )
+            logger.info(f"Successfully uploaded to S3: {key}")
+            return key
+        except (ClientError, BotoCoreError) as e:
+            logger.error(f"S3 upload error: {e}")
+            raise RuntimeError(f"Failed to upload to S3: {e}")
+
+    async def _upload_to_local(
+        self,
+        content: bytes,
+        folder: StorageFolder,
+        filename: str,
+    ) -> str:
+        """Upload file to local filesystem."""
+        filepath = Path(settings.UPLOAD_DIR) / folder / filename
+        filepath.parent.mkdir(parents=True, exist_ok=True)
+
+        with open(filepath, "wb") as f:
+            f.write(content)
+
+        return str(filepath)
+
+    def get_url(self, path: str | None, folder: StorageFolder) -> str | None:
+        """
+        Get public URL for a file.
+
+        Args:
+            path: File path/key (can be full path or just filename)
+            folder: Storage folder (avatars, covers, proofs)
+
+        Returns:
+            Public URL or None if path is None
+        """
+        if not path:
+            return None
+
+        # Extract filename from path
+        filename = path.split("/")[-1]
+
+        if settings.S3_ENABLED:
+            # S3 URL
+            return f"{settings.S3_PUBLIC_URL}/{folder}/{filename}"
+        else:
+            # Local URL
+            return f"/uploads/{folder}/{filename}"
+
+    async def delete_file(self, path: str | None) -> bool:
+        """
+        Delete file from storage.
+
+        Args:
+            path: File path/key
+
+        Returns:
+            True if deleted, False otherwise
+        """
+        if not path:
+            return False
+
+        if settings.S3_ENABLED:
+            return await self._delete_from_s3(path)
+        else:
+            return await self._delete_from_local(path)
+
+    async def _delete_from_s3(self, key: str) -> bool:
+        """Delete file from S3."""
+        try:
+            self.s3_client.delete_object(
+                Bucket=settings.S3_BUCKET_NAME,
+                Key=key,
+            )
+            return True
+        except ClientError:
+            return False
+
+    async def _delete_from_local(self, path: str) -> bool:
+        """Delete file from local filesystem."""
+        try:
+            filepath = Path(path)
+            if filepath.exists():
+                filepath.unlink()
+                return True
+            return False
+        except Exception:
+            return False
+
+    async def get_file(
+        self,
+        path: str,
+        folder: StorageFolder,
+    ) -> tuple[bytes, str] | None:
+        """
+        Get file content from storage.
+
+        Args:
+            path: File path/key (can be full path or just filename)
+            folder: Storage folder
+
+        Returns:
+            Tuple of (content bytes, content_type) or None if not found
+        """
+        if not path:
+            return None
+
+        # Extract filename from path
+        filename = path.split("/")[-1]
+
+        if settings.S3_ENABLED:
+            return await self._get_from_s3(folder, filename)
+        else:
+            return await self._get_from_local(folder, filename)
+
+    async def _get_from_s3(
+        self,
+        folder: StorageFolder,
+        filename: str,
+    ) -> tuple[bytes, str] | None:
+        """Get file from S3."""
+        key = f"{folder}/{filename}"
+
+        if not self.s3_client:
+            logger.error("S3 client not initialized")
+            return None
+
+        try:
+            response = self.s3_client.get_object(
+                Bucket=settings.S3_BUCKET_NAME,
+                Key=key,
+            )
+            content = response["Body"].read()
+            content_type = response.get("ContentType", "application/octet-stream")
+            return content, content_type
+        except ClientError as e:
+            logger.error(f"S3 get error for {key}: {e}")
+            return None
+
+    async def _get_from_local(
+        self,
+        folder: StorageFolder,
+        filename: str,
+    ) -> tuple[bytes, str] | None:
+        """Get file from local filesystem."""
+        filepath = Path(settings.UPLOAD_DIR) / folder / filename
+
+        if not filepath.exists():
+            return None
+
+        try:
+            with open(filepath, "rb") as f:
+                content = f.read()
+
+            # Determine content type from extension
+            ext = filename.rsplit(".", 1)[-1].lower() if "." in filename else ""
+            content_types = {
+                "jpg": "image/jpeg",
+                "jpeg": "image/jpeg",
+                "png": "image/png",
+                "gif": "image/gif",
+                "webp": "image/webp",
+                "mp4": "video/mp4",
+                "webm": "video/webm",
+                "mov": "video/quicktime",
+            }
+            content_type = content_types.get(ext, "application/octet-stream")
+
+            return content, content_type
+        except Exception as e:
+            logger.error(f"Local get error for {filepath}: {e}")
+            return None
+
+
+# Singleton instance
+storage_service = StorageService()

backend/app/services/telegram_notifier.py

@@ -0,0 +1,212 @@
+import logging
+from typing import List
+
+import httpx
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.config import settings
+from app.models import User, Participant, Marathon
+
+logger = logging.getLogger(__name__)
+
+
+class TelegramNotifier:
+    """Service for sending Telegram notifications."""
+
+    def __init__(self):
+        self.bot_token = settings.TELEGRAM_BOT_TOKEN
+        self.api_url = f"https://api.telegram.org/bot{self.bot_token}"
+
+    async def send_message(
+        self,
+        chat_id: int,
+        text: str,
+        parse_mode: str = "HTML"
+    ) -> bool:
+        """Send a message to a Telegram chat."""
+        if not self.bot_token:
+            logger.warning("Telegram bot token not configured")
+            return False
+
+        try:
+            async with httpx.AsyncClient() as client:
+                response = await client.post(
+                    f"{self.api_url}/sendMessage",
+                    json={
+                        "chat_id": chat_id,
+                        "text": text,
+                        "parse_mode": parse_mode
+                    },
+                    timeout=10.0
+                )
+                if response.status_code == 200:
+                    return True
+                else:
+                    logger.error(f"Failed to send message: {response.text}")
+                    return False
+        except Exception as e:
+            logger.error(f"Error sending Telegram message: {e}")
+            return False
+
+    async def notify_user(
+        self,
+        db: AsyncSession,
+        user_id: int,
+        message: str
+    ) -> bool:
+        """Send notification to a user by user_id."""
+        result = await db.execute(
+            select(User).where(User.id == user_id)
+        )
+        user = result.scalar_one_or_none()
+
+        if not user or not user.telegram_id:
+            return False
+
+        return await self.send_message(user.telegram_id, message)
+
+    async def notify_marathon_participants(
+        self,
+        db: AsyncSession,
+        marathon_id: int,
+        message: str,
+        exclude_user_id: int | None = None
+    ) -> int:
+        """Send notification to all marathon participants with linked Telegram."""
+        result = await db.execute(
+            select(User)
+            .join(Participant, Participant.user_id == User.id)
+            .where(
+                Participant.marathon_id == marathon_id,
+                User.telegram_id.isnot(None)
+            )
+        )
+        users = result.scalars().all()
+
+        sent_count = 0
+        for user in users:
+            if exclude_user_id and user.id == exclude_user_id:
+                continue
+            if await self.send_message(user.telegram_id, message):
+                sent_count += 1
+
+        return sent_count
+
+    # Notification templates
+    async def notify_event_start(
+        self,
+        db: AsyncSession,
+        marathon_id: int,
+        event_type: str,
+        marathon_title: str
+    ) -> int:
+        """Notify participants about event start."""
+        event_messages = {
+            "golden_hour": f"🌟 <b>Начался Golden Hour</b> в «{marathon_title}»!\n\nВсе очки x1.5 в течение часа!",
+            "jackpot": f"🎰 <b>JACKPOT</b> в «{marathon_title}»!\n\nОчки x3 за следующий сложный челлендж!",
+            "double_risk": f"⚡ <b>Double Risk</b> в «{marathon_title}»!\n\nПоловина очков, но дропы бесплатны!",
+            "common_enemy": f"👥 <b>Common Enemy</b> в «{marathon_title}»!\n\nВсе получают одинаковый челлендж. Первые 3 — бонус!",
+            "swap": f"🔄 <b>Swap</b> в «{marathon_title}»!\n\nМожно поменяться заданием с другим участником!",
+            "game_choice": f"🎲 <b>Выбор игры</b> в «{marathon_title}»!\n\nВыбери игру и один из 3 челленджей!"
+        }
+
+        message = event_messages.get(
+            event_type,
+            f"📌 Новое событие в «{marathon_title}»!"
+        )
+
+        return await self.notify_marathon_participants(db, marathon_id, message)
+
+    async def notify_event_end(
+        self,
+        db: AsyncSession,
+        marathon_id: int,
+        event_type: str,
+        marathon_title: str
+    ) -> int:
+        """Notify participants about event end."""
+        event_names = {
+            "golden_hour": "Golden Hour",
+            "jackpot": "Jackpot",
+            "double_risk": "Double Risk",
+            "common_enemy": "Common Enemy",
+            "swap": "Swap",
+            "game_choice": "Выбор игры"
+        }
+
+        event_name = event_names.get(event_type, "Событие")
+        message = f"⏰ <b>{event_name}</b> в «{marathon_title}» завершён"
+
+        return await self.notify_marathon_participants(db, marathon_id, message)
+
+    async def notify_marathon_start(
+        self,
+        db: AsyncSession,
+        marathon_id: int,
+        marathon_title: str
+    ) -> int:
+        """Notify participants about marathon start."""
+        message = (
+            f"🚀 <b>Марафон «{marathon_title}» начался!</b>\n\n"
+            f"Время крутить колесо и получить первое задание!"
+        )
+        return await self.notify_marathon_participants(db, marathon_id, message)
+
+    async def notify_marathon_finish(
+        self,
+        db: AsyncSession,
+        marathon_id: int,
+        marathon_title: str
+    ) -> int:
+        """Notify participants about marathon finish."""
+        message = (
+            f"🏆 <b>Марафон «{marathon_title}» завершён!</b>\n\n"
+            f"Зайди на сайт, чтобы увидеть итоговую таблицу!"
+        )
+        return await self.notify_marathon_participants(db, marathon_id, message)
+
+    async def notify_dispute_raised(
+        self,
+        db: AsyncSession,
+        user_id: int,
+        marathon_title: str,
+        challenge_title: str
+    ) -> bool:
+        """Notify user about dispute raised on their assignment."""
+        message = (
+            f"⚠️ <b>На твоё задание подан спор</b>\n\n"
+            f"Марафон: {marathon_title}\n"
+            f"Задание: {challenge_title}\n\n"
+            f"Зайди на сайт, чтобы ответить на спор."
+        )
+        return await self.notify_user(db, user_id, message)
+
+    async def notify_dispute_resolved(
+        self,
+        db: AsyncSession,
+        user_id: int,
+        marathon_title: str,
+        challenge_title: str,
+        is_valid: bool
+    ) -> bool:
+        """Notify user about dispute resolution."""
+        if is_valid:
+            message = (
+                f"❌ <b>Спор признан обоснованным</b>\n\n"
+                f"Марафон: {marathon_title}\n"
+                f"Задание: {challenge_title}\n\n"
+                f"Задание возвращено. Выполни его заново."
+            )
+        else:
+            message = (
+                f"✅ <b>Спор отклонён</b>\n\n"
+                f"Марафон: {marathon_title}\n"
+                f"Задание: {challenge_title}\n\n"
+                f"Твоё выполнение засчитано!"
+            )
+        return await self.notify_user(db, user_id, message)
+
+
+# Global instance
+telegram_notifier = TelegramNotifier()

backend/requirements.txt

@@ -28,5 +28,8 @@ httpx==0.26.0
 aiofiles==23.2.1
 python-magic==0.4.27
 
+# S3 Storage
+boto3==1.34.0
+
 # Utils
 python-dotenv==1.0.0

bot/Dockerfile

@@ -0,0 +1,10 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+CMD ["python", "main.py"]

bot/config.py

@@ -0,0 +1,14 @@
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    TELEGRAM_BOT_TOKEN: str
+    API_URL: str = "http://backend:8000"
+    BOT_USERNAME: str = ""  # Will be set dynamically on startup
+
+    class Config:
+        env_file = ".env"
+        extra = "ignore"
+
+
+settings = Settings()

bot/handlers/__init__.py

@@ -0,0 +1 @@
+# Bot handlers

bot/handlers/link.py

@@ -0,0 +1,60 @@
+from aiogram import Router, F
+from aiogram.filters import Command
+from aiogram.types import Message
+
+from keyboards.main_menu import get_main_menu
+from services.api_client import api_client
+
+router = Router()
+
+
+@router.message(Command("unlink"))
+async def cmd_unlink(message: Message):
+    """Handle /unlink command to disconnect Telegram account."""
+    user = await api_client.get_user_by_telegram_id(message.from_user.id)
+
+    if not user:
+        await message.answer(
+            "Твой аккаунт не привязан к Game Marathon.\n"
+            "Привяжи его через настройки профиля на сайте.",
+            reply_markup=get_main_menu()
+        )
+        return
+
+    result = await api_client.unlink_telegram(message.from_user.id)
+
+    if result.get("success"):
+        await message.answer(
+            "<b>Аккаунт отвязан</b>\n\n"
+            "Ты больше не будешь получать уведомления.\n"
+            "Чтобы привязать аккаунт снова, используй кнопку в настройках профиля на сайте.",
+            reply_markup=get_main_menu()
+        )
+    else:
+        await message.answer(
+            "Произошла ошибка при отвязке аккаунта.\n"
+            "Попробуй позже или обратись к администратору.",
+            reply_markup=get_main_menu()
+        )
+
+
+@router.message(Command("status"))
+async def cmd_status(message: Message):
+    """Check account link status."""
+    user = await api_client.get_user_by_telegram_id(message.from_user.id)
+
+    if user:
+        await message.answer(
+            f"<b>Статус аккаунта</b>\n\n"
+            f"✅ Аккаунт привязан\n"
+            f"👤 Никнейм: <b>{user.get('nickname', 'N/A')}</b>\n"
+            f"🆔 ID: {user.get('id', 'N/A')}",
+            reply_markup=get_main_menu()
+        )
+    else:
+        await message.answer(
+            "<b>Статус аккаунта</b>\n\n"
+            "❌ Аккаунт не привязан\n\n"
+            "Привяжи его через настройки профиля на сайте.",
+            reply_markup=get_main_menu()
+        )

bot/handlers/marathons.py

@@ -0,0 +1,211 @@
+from aiogram import Router, F
+from aiogram.filters import Command
+from aiogram.types import Message, CallbackQuery
+
+from keyboards.main_menu import get_main_menu
+from keyboards.inline import get_marathons_keyboard, get_marathon_details_keyboard
+from services.api_client import api_client
+
+router = Router()
+
+
+@router.message(Command("marathons"))
+@router.message(F.text == "📊 Мои марафоны")
+async def cmd_marathons(message: Message):
+    """Show user's marathons."""
+    user = await api_client.get_user_by_telegram_id(message.from_user.id)
+
+    if not user:
+        await message.answer(
+            "Сначала привяжи аккаунт через настройки профиля на сайте.",
+            reply_markup=get_main_menu()
+        )
+        return
+
+    marathons = await api_client.get_user_marathons(message.from_user.id)
+
+    if not marathons:
+        await message.answer(
+            "<b>Мои марафоны</b>\n\n"
+            "У тебя пока нет активных марафонов.\n"
+            "Присоединись к марафону на сайте!",
+            reply_markup=get_main_menu()
+        )
+        return
+
+    text = "<b>📊 Мои марафоны</b>\n\n"
+
+    for m in marathons:
+        status_emoji = {
+            "preparing": "⏳",
+            "active": "🎮",
+            "finished": "🏁"
+        }.get(m.get("status"), "❓")
+
+        text += f"{status_emoji} <b>{m.get('title')}</b>\n"
+        text += f"   Очки: {m.get('total_points', 0)} | "
+        text += f"Место: #{m.get('position', '?')}\n\n"
+
+    await message.answer(
+        text,
+        reply_markup=get_marathons_keyboard(marathons)
+    )
+
+
+@router.callback_query(F.data.startswith("marathon:"))
+async def marathon_details(callback: CallbackQuery):
+    """Show marathon details."""
+    marathon_id = int(callback.data.split(":")[1])
+
+    details = await api_client.get_marathon_details(
+        marathon_id=marathon_id,
+        telegram_id=callback.from_user.id
+    )
+
+    if not details:
+        await callback.answer("Не удалось загрузить данные марафона", show_alert=True)
+        return
+
+    marathon = details.get("marathon", {})
+    participant = details.get("participant", {})
+    active_events = details.get("active_events", [])
+    current_assignment = details.get("current_assignment")
+
+    status_text = {
+        "preparing": "⏳ Подготовка",
+        "active": "🎮 Активен",
+        "finished": "🏁 Завершён"
+    }.get(marathon.get("status"), "❓")
+
+    text = f"<b>{marathon.get('title')}</b>\n"
+    text += f"Статус: {status_text}\n\n"
+
+    text += f"<b>📈 Твоя статистика:</b>\n"
+    text += f"• Очки: <b>{participant.get('total_points', 0)}</b>\n"
+    text += f"• Место: <b>#{details.get('position', '?')}</b>\n"
+    text += f"• Стрик: <b>{participant.get('current_streak', 0)}</b> 🔥\n"
+    text += f"• Дропов: <b>{participant.get('drop_count', 0)}</b>\n\n"
+
+    if active_events:
+        text += "<b>⚡ Активные события:</b>\n"
+        for event in active_events:
+            event_emoji = {
+                "golden_hour": "🌟",
+                "jackpot": "🎰",
+                "double_risk": "⚡",
+                "common_enemy": "👥",
+                "swap": "🔄",
+                "game_choice": "🎲"
+            }.get(event.get("type"), "📌")
+            text += f"{event_emoji} {event.get('type', '').replace('_', ' ').title()}\n"
+        text += "\n"
+
+    if current_assignment:
+        challenge = current_assignment.get("challenge", {})
+        game = challenge.get("game", {})
+        text += f"<b>🎯 Текущее задание:</b>\n"
+        text += f"Игра: {game.get('title', 'N/A')}\n"
+        text += f"Задание: {challenge.get('title', 'N/A')}\n"
+        text += f"Сложность: {challenge.get('difficulty', 'N/A')}\n"
+        text += f"Очки: {challenge.get('points', 0)}\n"
+
+    await callback.message.edit_text(
+        text,
+        reply_markup=get_marathon_details_keyboard(marathon_id)
+    )
+    await callback.answer()
+
+
+@router.callback_query(F.data == "back_to_marathons")
+async def back_to_marathons(callback: CallbackQuery):
+    """Go back to marathons list."""
+    marathons = await api_client.get_user_marathons(callback.from_user.id)
+
+    if not marathons:
+        await callback.message.edit_text(
+            "<b>Мои марафоны</b>\n\n"
+            "У тебя пока нет активных марафонов."
+        )
+        await callback.answer()
+        return
+
+    text = "<b>📊 Мои марафоны</b>\n\n"
+
+    for m in marathons:
+        status_emoji = {
+            "preparing": "⏳",
+            "active": "🎮",
+            "finished": "🏁"
+        }.get(m.get("status"), "❓")
+
+        text += f"{status_emoji} <b>{m.get('title')}</b>\n"
+        text += f"   Очки: {m.get('total_points', 0)} | "
+        text += f"Место: #{m.get('position', '?')}\n\n"
+
+    await callback.message.edit_text(
+        text,
+        reply_markup=get_marathons_keyboard(marathons)
+    )
+    await callback.answer()
+
+
+@router.message(Command("stats"))
+@router.message(F.text == "📈 Статистика")
+async def cmd_stats(message: Message):
+    """Show user's overall statistics."""
+    user = await api_client.get_user_by_telegram_id(message.from_user.id)
+
+    if not user:
+        await message.answer(
+            "Сначала привяжи аккаунт через настройки профиля на сайте.",
+            reply_markup=get_main_menu()
+        )
+        return
+
+    stats = await api_client.get_user_stats(message.from_user.id)
+
+    if not stats:
+        await message.answer(
+            "<b>📈 Статистика</b>\n\n"
+            "Пока нет данных для отображения.\n"
+            "Начни участвовать в марафонах!",
+            reply_markup=get_main_menu()
+        )
+        return
+
+    text = f"<b>📈 Общая статистика</b>\n\n"
+    text += f"👤 <b>{user.get('nickname', 'Игрок')}</b>\n\n"
+    text += f"🏆 Марафонов завершено: <b>{stats.get('marathons_completed', 0)}</b>\n"
+    text += f"🎮 Марафонов активно: <b>{stats.get('marathons_active', 0)}</b>\n"
+    text += f"✅ Заданий выполнено: <b>{stats.get('challenges_completed', 0)}</b>\n"
+    text += f"💰 Всего очков: <b>{stats.get('total_points', 0)}</b>\n"
+    text += f"🔥 Лучший стрик: <b>{stats.get('best_streak', 0)}</b>\n"
+
+    await message.answer(text, reply_markup=get_main_menu())
+
+
+@router.message(Command("settings"))
+@router.message(F.text == "⚙️ Настройки")
+async def cmd_settings(message: Message):
+    """Show notification settings."""
+    user = await api_client.get_user_by_telegram_id(message.from_user.id)
+
+    if not user:
+        await message.answer(
+            "Сначала привяжи аккаунт через настройки профиля на сайте.",
+            reply_markup=get_main_menu()
+        )
+        return
+
+    await message.answer(
+        "<b>⚙️ Настройки</b>\n\n"
+        "Управление уведомлениями будет доступно в следующем обновлении.\n\n"
+        "Сейчас ты получаешь все уведомления:\n"
+        "• 🌟 События (Golden Hour, Jackpot и др.)\n"
+        "• 🚀 Старт/финиш марафонов\n"
+        "• ⚠️ Споры по заданиям\n\n"
+        "Команды:\n"
+        "/unlink - Отвязать аккаунт\n"
+        "/status - Проверить привязку",
+        reply_markup=get_main_menu()
+    )

bot/handlers/start.py

@@ -0,0 +1,146 @@
+import logging
+
+from aiogram import Router, F, Bot
+from aiogram.filters import CommandStart, Command, CommandObject
+from aiogram.types import Message
+
+from config import settings
+from keyboards.main_menu import get_main_menu
+from services.api_client import api_client
+
+logger = logging.getLogger(__name__)
+router = Router()
+
+
+async def get_user_avatar_url(bot: Bot, user_id: int) -> str | None:
+    """Get user's Telegram profile photo URL."""
+    try:
+        photos = await bot.get_user_profile_photos(user_id, limit=1)
+        if photos.total_count > 0 and photos.photos:
+            # Get the largest photo (last in the list)
+            photo = photos.photos[0][-1]
+            file = await bot.get_file(photo.file_id)
+            if file.file_path:
+                return f"https://api.telegram.org/file/bot{settings.TELEGRAM_BOT_TOKEN}/{file.file_path}"
+    except Exception as e:
+        logger.warning(f"[START] Could not get user avatar: {e}")
+    return None
+
+
+@router.message(CommandStart())
+async def cmd_start(message: Message, command: CommandObject):
+    """Handle /start command with or without deep link."""
+    logger.info(f"[START] ==================== START COMMAND ====================")
+    logger.info(f"[START] Telegram user: id={message.from_user.id}, username=@{message.from_user.username}")
+    logger.info(f"[START] Full message text: '{message.text}'")
+    logger.info(f"[START] Deep link args (command.args): '{command.args}'")
+
+    # Check if there's a deep link token (for account linking)
+    token = command.args
+    if token:
+        logger.info(f"[START] -------- TOKEN RECEIVED --------")
+        logger.info(f"[START] Token: {token}")
+        logger.info(f"[START] Token length: {len(token)} chars")
+
+        # Get user's avatar
+        avatar_url = await get_user_avatar_url(message.bot, message.from_user.id)
+        logger.info(f"[START] User avatar URL: {avatar_url}")
+
+        logger.info(f"[START] -------- CALLING API --------")
+        logger.info(f"[START] Sending to /telegram/confirm-link:")
+        logger.info(f"[START]   - token: {token}")
+        logger.info(f"[START]   - telegram_id: {message.from_user.id}")
+        logger.info(f"[START]   - telegram_username: {message.from_user.username}")
+        logger.info(f"[START]   - telegram_first_name: {message.from_user.first_name}")
+        logger.info(f"[START]   - telegram_last_name: {message.from_user.last_name}")
+        logger.info(f"[START]   - telegram_avatar_url: {avatar_url}")
+
+        result = await api_client.confirm_telegram_link(
+            token=token,
+            telegram_id=message.from_user.id,
+            telegram_username=message.from_user.username,
+            telegram_first_name=message.from_user.first_name,
+            telegram_last_name=message.from_user.last_name,
+            telegram_avatar_url=avatar_url
+        )
+
+        logger.info(f"[START] -------- API RESPONSE --------")
+        logger.info(f"[START] Response: {result}")
+        logger.info(f"[START] Success: {result.get('success')}")
+
+        if result.get("success"):
+            user_nickname = result.get("nickname", "пользователь")
+            logger.info(f"[START] ✅ LINK SUCCESS! User '{user_nickname}' linked to telegram_id={message.from_user.id}")
+            await message.answer(
+                f"<b>Аккаунт успешно привязан!</b>\n\n"
+                f"Привет, <b>{user_nickname}</b>!\n\n"
+                f"Теперь ты будешь получать уведомления о:\n"
+                f"• Начале и окончании событий (Golden Hour, Jackpot и др.)\n"
+                f"• Старте и завершении марафонов\n"
+                f"• Спорах по твоим заданиям\n\n"
+                f"Используй меню ниже для навигации:",
+                reply_markup=get_main_menu()
+            )
+            return
+        else:
+            error = result.get("error", "Неизвестная ошибка")
+            logger.error(f"[START] ❌ LINK FAILED!")
+            logger.error(f"[START] Error: {error}")
+            logger.error(f"[START] Token was: {token}")
+            await message.answer(
+                f"<b>Ошибка привязки аккаунта</b>\n\n"
+                f"{error}\n\n"
+                f"Попробуй получить новую ссылку на сайте.",
+                reply_markup=get_main_menu()
+            )
+            return
+
+    # No token - regular start
+    logger.info(f"[START] No token, checking if user is already linked...")
+    user = await api_client.get_user_by_telegram_id(message.from_user.id)
+    logger.info(f"[START] API response: {user}")
+
+    if user:
+        await message.answer(
+            f"<b>С возвращением, {user.get('nickname', 'игрок')}!</b>\n\n"
+            f"Твой аккаунт привязан. Используй меню для навигации:",
+            reply_markup=get_main_menu()
+        )
+    else:
+        await message.answer(
+            "<b>Добро пожаловать в Game Marathon Bot!</b>\n\n"
+            "Этот бот поможет тебе следить за марафонами и "
+            "получать уведомления о важных событиях.\n\n"
+            "<b>Для начала работы:</b>\n"
+            "1. Зайди на сайт в настройки профиля\n"
+            "2. Нажми кнопку «Привязать Telegram»\n"
+            "3. Перейди по полученной ссылке\n\n"
+            "После привязки ты сможешь:\n"
+            "• Смотреть свои марафоны\n"
+            "• Получать уведомления о событиях\n"
+            "• Следить за статистикой",
+            reply_markup=get_main_menu()
+        )
+
+
+@router.message(Command("help"))
+@router.message(F.text == "❓ Помощь")
+async def cmd_help(message: Message):
+    """Handle /help command."""
+    await message.answer(
+        "<b>Справка по командам:</b>\n\n"
+        "/start - Начать работу с ботом\n"
+        "/marathons - Мои марафоны\n"
+        "/stats - Моя статистика\n"
+        "/settings - Настройки уведомлений\n"
+        "/help - Эта справка\n\n"
+        "<b>Уведомления:</b>\n"
+        "Бот присылает уведомления о:\n"
+        "• 🌟 Golden Hour - очки x1.5\n"
+        "• 🎰 Jackpot - очки x3\n"
+        "• ⚡ Double Risk - половина очков, дропы бесплатны\n"
+        "• 👥 Common Enemy - общий челлендж\n"
+        "• 🚀 Старт/финиш марафонов\n"
+        "• ⚠️ Споры по заданиям",
+        reply_markup=get_main_menu()
+    )

bot/keyboards/__init__.py

@@ -0,0 +1 @@
+# Bot keyboards

bot/keyboards/inline.py

@@ -0,0 +1,42 @@
+from aiogram.types import InlineKeyboardMarkup, InlineKeyboardButton
+
+
+def get_marathons_keyboard(marathons: list) -> InlineKeyboardMarkup:
+    """Create keyboard with marathon buttons."""
+    buttons = []
+
+    for marathon in marathons:
+        status_emoji = {
+            "preparing": "⏳",
+            "active": "🎮",
+            "finished": "🏁"
+        }.get(marathon.get("status"), "❓")
+
+        buttons.append([
+            InlineKeyboardButton(
+                text=f"{status_emoji} {marathon.get('title', 'Marathon')}",
+                callback_data=f"marathon:{marathon.get('id')}"
+            )
+        ])
+
+    return InlineKeyboardMarkup(inline_keyboard=buttons)
+
+
+def get_marathon_details_keyboard(marathon_id: int) -> InlineKeyboardMarkup:
+    """Create keyboard for marathon details view."""
+    buttons = [
+        [
+            InlineKeyboardButton(
+                text="🔄 Обновить",
+                callback_data=f"marathon:{marathon_id}"
+            )
+        ],
+        [
+            InlineKeyboardButton(
+                text="◀️ Назад к списку",
+                callback_data="back_to_marathons"
+            )
+        ]
+    ]
+
+    return InlineKeyboardMarkup(inline_keyboard=buttons)

bot/keyboards/main_menu.py

@@ -0,0 +1,21 @@
+from aiogram.types import ReplyKeyboardMarkup, KeyboardButton
+
+
+def get_main_menu() -> ReplyKeyboardMarkup:
+    """Create main menu keyboard."""
+    keyboard = [
+        [
+            KeyboardButton(text="📊 Мои марафоны"),
+            KeyboardButton(text="📈 Статистика")
+        ],
+        [
+            KeyboardButton(text="⚙️ Настройки"),
+            KeyboardButton(text="❓ Помощь")
+        ]
+    ]
+
+    return ReplyKeyboardMarkup(
+        keyboard=keyboard,
+        resize_keyboard=True,
+        input_field_placeholder="Выбери действие..."
+    )

bot/main.py

@@ -0,0 +1,65 @@
+import asyncio
+import logging
+import sys
+
+from aiogram import Bot, Dispatcher
+from aiogram.client.default import DefaultBotProperties
+from aiogram.enums import ParseMode
+
+from config import settings
+from handlers import start, marathons, link
+from middlewares.logging import LoggingMiddleware
+
+# Configure logging to stdout with DEBUG level
+logging.basicConfig(
+    level=logging.DEBUG,
+    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
+    handlers=[
+        logging.StreamHandler(sys.stdout)
+    ]
+)
+logger = logging.getLogger(__name__)
+
+# Set aiogram logging level
+logging.getLogger("aiogram").setLevel(logging.INFO)
+
+
+async def main():
+    logger.info("="*50)
+    logger.info("Starting Game Marathon Bot...")
+    logger.info(f"API_URL: {settings.API_URL}")
+    logger.info(f"BOT_TOKEN: {settings.TELEGRAM_BOT_TOKEN[:20]}...")
+    logger.info("="*50)
+
+    bot = Bot(
+        token=settings.TELEGRAM_BOT_TOKEN,
+        default=DefaultBotProperties(parse_mode=ParseMode.HTML)
+    )
+
+    # Get bot username for deep links
+    bot_info = await bot.get_me()
+    settings.BOT_USERNAME = bot_info.username
+    logger.info(f"Bot info: @{settings.BOT_USERNAME} (id={bot_info.id})")
+
+    dp = Dispatcher()
+
+    # Register middleware
+    dp.message.middleware(LoggingMiddleware())
+    logger.info("Logging middleware registered")
+
+    # Register routers
+    logger.info("Registering routers...")
+    dp.include_router(start.router)
+    dp.include_router(link.router)
+    dp.include_router(marathons.router)
+    logger.info("Routers registered: start, link, marathons")
+
+    # Start polling
+    logger.info("Deleting webhook and starting polling...")
+    await bot.delete_webhook(drop_pending_updates=True)
+    logger.info("Polling started! Waiting for messages...")
+    await dp.start_polling(bot)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

bot/middlewares/__init__.py

@@ -0,0 +1 @@
+# Bot middlewares

bot/middlewares/logging.py

@@ -0,0 +1,28 @@
+import logging
+from typing import Any, Awaitable, Callable, Dict
+
+from aiogram import BaseMiddleware
+from aiogram.types import Message, Update
+
+logger = logging.getLogger(__name__)
+
+
+class LoggingMiddleware(BaseMiddleware):
+    async def __call__(
+        self,
+        handler: Callable[[Message, Dict[str, Any]], Awaitable[Any]],
+        event: Message,
+        data: Dict[str, Any]
+    ) -> Any:
+        logger.info("="*60)
+        logger.info(f"[MIDDLEWARE] Incoming message from user {event.from_user.id}")
+        logger.info(f"[MIDDLEWARE] Username: @{event.from_user.username}")
+        logger.info(f"[MIDDLEWARE] Text: {event.text}")
+        logger.info(f"[MIDDLEWARE] Message ID: {event.message_id}")
+        logger.info(f"[MIDDLEWARE] Chat ID: {event.chat.id}")
+        logger.info("="*60)
+
+        result = await handler(event, data)
+
+        logger.info(f"[MIDDLEWARE] Handler completed for message {event.message_id}")
+        return result

bot/requirements.txt

@@ -0,0 +1,5 @@
+aiogram==3.23.0
+aiohttp==3.10.5
+pydantic==2.9.2
+pydantic-settings==2.5.2
+python-dotenv==1.0.1

bot/services/__init__.py

@@ -0,0 +1 @@
+# Bot services

bot/services/api_client.py

@@ -0,0 +1,129 @@
+import logging
+from typing import Any
+
+import aiohttp
+
+from config import settings
+
+logger = logging.getLogger(__name__)
+
+
+class APIClient:
+    """HTTP client for backend API communication."""
+
+    def __init__(self):
+        self.base_url = settings.API_URL
+        self._session: aiohttp.ClientSession | None = None
+        logger.info(f"[APIClient] Initialized with base_url: {self.base_url}")
+
+    async def _get_session(self) -> aiohttp.ClientSession:
+        if self._session is None or self._session.closed:
+            logger.info("[APIClient] Creating new aiohttp session")
+            self._session = aiohttp.ClientSession()
+        return self._session
+
+    async def _request(
+        self,
+        method: str,
+        endpoint: str,
+        **kwargs
+    ) -> dict[str, Any] | None:
+        """Make HTTP request to backend API."""
+        session = await self._get_session()
+        url = f"{self.base_url}/api/v1{endpoint}"
+
+        logger.info(f"[APIClient] {method} {url}")
+        if 'json' in kwargs:
+            logger.info(f"[APIClient] Request body: {kwargs['json']}")
+        if 'params' in kwargs:
+            logger.info(f"[APIClient] Request params: {kwargs['params']}")
+
+        try:
+            async with session.request(method, url, **kwargs) as response:
+                logger.info(f"[APIClient] Response status: {response.status}")
+                response_text = await response.text()
+                logger.info(f"[APIClient] Response body: {response_text[:500]}")
+
+                if response.status == 200:
+                    import json
+                    return json.loads(response_text)
+                elif response.status == 404:
+                    logger.warning(f"[APIClient] 404 Not Found")
+                    return None
+                else:
+                    logger.error(f"[APIClient] API error {response.status}: {response_text}")
+                    return {"error": response_text}
+        except aiohttp.ClientError as e:
+            logger.error(f"[APIClient] Request failed: {e}")
+            return {"error": str(e)}
+        except Exception as e:
+            logger.error(f"[APIClient] Unexpected error: {e}")
+            return {"error": str(e)}
+
+    async def confirm_telegram_link(
+        self,
+        token: str,
+        telegram_id: int,
+        telegram_username: str | None,
+        telegram_first_name: str | None = None,
+        telegram_last_name: str | None = None,
+        telegram_avatar_url: str | None = None
+    ) -> dict[str, Any]:
+        """Confirm Telegram account linking."""
+        result = await self._request(
+            "POST",
+            "/telegram/confirm-link",
+            json={
+                "token": token,
+                "telegram_id": telegram_id,
+                "telegram_username": telegram_username,
+                "telegram_first_name": telegram_first_name,
+                "telegram_last_name": telegram_last_name,
+                "telegram_avatar_url": telegram_avatar_url
+            }
+        )
+        return result or {"error": "Не удалось связаться с сервером"}
+
+    async def get_user_by_telegram_id(self, telegram_id: int) -> dict[str, Any] | None:
+        """Get user by Telegram ID."""
+        return await self._request("GET", f"/telegram/user/{telegram_id}")
+
+    async def unlink_telegram(self, telegram_id: int) -> dict[str, Any]:
+        """Unlink Telegram account."""
+        result = await self._request(
+            "POST",
+            f"/telegram/unlink/{telegram_id}"
+        )
+        return result or {"error": "Не удалось связаться с сервером"}
+
+    async def get_user_marathons(self, telegram_id: int) -> list[dict[str, Any]]:
+        """Get user's marathons."""
+        result = await self._request("GET", f"/telegram/marathons/{telegram_id}")
+        if isinstance(result, list):
+            return result
+        return result.get("marathons", []) if result else []
+
+    async def get_marathon_details(
+        self,
+        marathon_id: int,
+        telegram_id: int
+    ) -> dict[str, Any] | None:
+        """Get marathon details for user."""
+        return await self._request(
+            "GET",
+            f"/telegram/marathon/{marathon_id}",
+            params={"telegram_id": telegram_id}
+        )
+
+    async def get_user_stats(self, telegram_id: int) -> dict[str, Any] | None:
+        """Get user's overall statistics."""
+        return await self._request("GET", f"/telegram/stats/{telegram_id}")
+
+    async def close(self):
+        """Close the HTTP session."""
+        if self._session and not self._session.closed:
+            await self._session.close()
+
+
+# Global API client instance
+api_client = APIClient()

docker-compose.yml

@@ -27,7 +27,16 @@ services:
       SECRET_KEY: ${SECRET_KEY:-change-me-in-production}
       OPENAI_API_KEY: ${OPENAI_API_KEY}
       TELEGRAM_BOT_TOKEN: ${TELEGRAM_BOT_TOKEN}
+      TELEGRAM_BOT_USERNAME: ${TELEGRAM_BOT_USERNAME:-GameMarathonBot}
       DEBUG: ${DEBUG:-false}
+      # S3 Storage
+      S3_ENABLED: ${S3_ENABLED:-false}
+      S3_BUCKET_NAME: ${S3_BUCKET_NAME:-}
+      S3_REGION: ${S3_REGION:-ru-1}
+      S3_ACCESS_KEY_ID: ${S3_ACCESS_KEY_ID:-}
+      S3_SECRET_ACCESS_KEY: ${S3_SECRET_ACCESS_KEY:-}
+      S3_ENDPOINT_URL: ${S3_ENDPOINT_URL:-}
+      S3_PUBLIC_URL: ${S3_PUBLIC_URL:-}
     volumes:
       - ./backend/uploads:/app/uploads
       - ./backend/app:/app/app
@@ -64,5 +73,17 @@ services:
       - backend
     restart: unless-stopped
 
+  bot:
+    build:
+      context: ./bot
+      dockerfile: Dockerfile
+    container_name: marathon-bot
+    environment:
+      - TELEGRAM_BOT_TOKEN=${TELEGRAM_BOT_TOKEN}
+      - API_URL=http://backend:8000
+    depends_on:
+      - backend
+    restart: unless-stopped
+
 volumes:
   postgres_data:

frontend/src/App.tsx

@@ -1,5 +1,6 @@
 import { Routes, Route, Navigate } from 'react-router-dom'
 import { useAuthStore } from '@/store/auth'
+import { ToastContainer, ConfirmModal } from '@/components/ui'
 
 // Layout
 import { Layout } from '@/components/layout/Layout'
@@ -15,6 +16,7 @@ import { LobbyPage } from '@/pages/LobbyPage'
 import { PlayPage } from '@/pages/PlayPage'
 import { LeaderboardPage } from '@/pages/LeaderboardPage'
 import { InvitePage } from '@/pages/InvitePage'
+import { AssignmentDetailPage } from '@/pages/AssignmentDetailPage'
 
 // Protected route wrapper
 function ProtectedRoute({ children }: { children: React.ReactNode }) {
@@ -40,6 +42,9 @@ function PublicRoute({ children }: { children: React.ReactNode }) {
 
 function App() {
   return (
+    <>
+    <ToastContainer />
+    <ConfirmModal />
     <Routes>
       <Route path="/" element={<Layout />}>
         <Route index element={<HomePage />} />
@@ -118,8 +123,18 @@ function App() {
             </ProtectedRoute>
           }
         />
+
+        <Route
+          path="assignments/:id"
+          element={
+            <ProtectedRoute>
+              <AssignmentDetailPage />
+            </ProtectedRoute>
+          }
+        />
       </Route>
     </Routes>
+    </>
   )
 }
 

frontend/src/api/assignments.ts

@@ -0,0 +1,47 @@
+import client from './client'
+import type { AssignmentDetail, Dispute, DisputeComment, ReturnedAssignment } from '@/types'
+
+export const assignmentsApi = {
+  // Get detailed assignment info with proofs and dispute
+  getDetail: async (assignmentId: number): Promise<AssignmentDetail> => {
+    const response = await client.get<AssignmentDetail>(`/assignments/${assignmentId}`)
+    return response.data
+  },
+
+  // Create a dispute against an assignment
+  createDispute: async (assignmentId: number, reason: string): Promise<Dispute> => {
+    const response = await client.post<Dispute>(`/assignments/${assignmentId}/dispute`, { reason })
+    return response.data
+  },
+
+  // Add a comment to a dispute
+  addComment: async (disputeId: number, text: string): Promise<DisputeComment> => {
+    const response = await client.post<DisputeComment>(`/disputes/${disputeId}/comments`, { text })
+    return response.data
+  },
+
+  // Vote on a dispute (true = valid/proof is OK, false = invalid/proof is not OK)
+  vote: async (disputeId: number, vote: boolean): Promise<{ message: string }> => {
+    const response = await client.post<{ message: string }>(`/disputes/${disputeId}/vote`, { vote })
+    return response.data
+  },
+
+  // Get current user's returned assignments
+  getReturnedAssignments: async (marathonId: number): Promise<ReturnedAssignment[]> => {
+    const response = await client.get<ReturnedAssignment[]>(`/marathons/${marathonId}/returned-assignments`)
+    return response.data
+  },
+
+  // Get proof media as blob URL (supports both images and videos)
+  getProofMediaUrl: async (assignmentId: number): Promise<{ url: string; type: 'image' | 'video' }> => {
+    const response = await client.get(`/assignments/${assignmentId}/proof-media`, {
+      responseType: 'blob',
+    })
+    const contentType = response.headers['content-type'] || ''
+    const isVideo = contentType.startsWith('video/')
+    return {
+      url: URL.createObjectURL(response.data),
+      type: isVideo ? 'video' : 'image',
+    }
+  },
+}

frontend/src/api/events.ts

@@ -1,5 +1,5 @@
 import client from './client'
-import type { ActiveEvent, MarathonEvent, EventCreate, DroppedAssignment, SwapCandidate, SwapRequestItem, MySwapRequests, CommonEnemyLeaderboardEntry } from '@/types'
+import type { ActiveEvent, MarathonEvent, EventCreate, SwapCandidate, SwapRequestItem, MySwapRequests, CommonEnemyLeaderboardEntry, EventAssignment, CompleteResult, GameChoiceChallenges } from '@/types'
 
 export const eventsApi = {
   getActive: async (marathonId: number): Promise<ActiveEvent> => {
@@ -46,12 +46,18 @@ export const eventsApi = {
     await client.delete(`/marathons/${marathonId}/swap-requests/${requestId}`)
   },
 
-  rematch: async (marathonId: number, assignmentId: number): Promise<void> => {
+  // Game Choice event
-    await client.post(`/marathons/${marathonId}/rematch/${assignmentId}`)
+  getGameChoiceChallenges: async (marathonId: number, gameId: number): Promise<GameChoiceChallenges> => {
+    const response = await client.get<GameChoiceChallenges>(`/marathons/${marathonId}/game-choice/challenges`, {
+      params: { game_id: gameId },
+    })
+    return response.data
   },
 
-  getDroppedAssignments: async (marathonId: number): Promise<DroppedAssignment[]> => {
+  selectGameChoiceChallenge: async (marathonId: number, challengeId: number): Promise<{ message: string }> => {
-    const response = await client.get<DroppedAssignment[]>(`/marathons/${marathonId}/dropped-assignments`)
+    const response = await client.post<{ message: string }>(`/marathons/${marathonId}/game-choice/select`, {
+      challenge_id: challengeId,
+    })
     return response.data
   },
 
@@ -64,4 +70,27 @@ export const eventsApi = {
     const response = await client.get<CommonEnemyLeaderboardEntry[]>(`/marathons/${marathonId}/common-enemy-leaderboard`)
     return response.data
   },
+
+  // Event Assignment (Common Enemy)
+  getEventAssignment: async (marathonId: number): Promise<EventAssignment> => {
+    const response = await client.get<EventAssignment>(`/marathons/${marathonId}/event-assignment`)
+    return response.data
+  },
+
+  completeEventAssignment: async (
+    assignmentId: number,
+    data: { proof_url?: string; comment?: string; proof_file?: File }
+  ): Promise<CompleteResult> => {
+    const formData = new FormData()
+    if (data.proof_url) formData.append('proof_url', data.proof_url)
+    if (data.comment) formData.append('comment', data.comment)
+    if (data.proof_file) formData.append('proof_file', data.proof_file)
+
+    const response = await client.post<CompleteResult>(
+      `/event-assignments/${assignmentId}/complete`,
+      formData,
+      { headers: { 'Content-Type': 'multipart/form-data' } }
+    )
+    return response.data
+  },
 }

frontend/src/api/index.ts

@@ -6,3 +6,4 @@ export { feedApi } from './feed'
 export { adminApi } from './admin'
 export { eventsApi } from './events'
 export { challengesApi } from './challenges'
+export { assignmentsApi } from './assignments'

frontend/src/api/telegram.ts

@@ -0,0 +1,22 @@
+import client from './client'
+
+export interface TelegramLinkToken {
+  token: string
+  bot_url: string
+}
+
+export interface TelegramStatus {
+  telegram_id: number | null
+  telegram_username: string | null
+}
+
+export const telegramApi = {
+  generateLinkToken: async (): Promise<TelegramLinkToken> => {
+    const response = await client.post<TelegramLinkToken>('/telegram/generate-link-token')
+    return response.data
+  },
+
+  unlinkTelegram: async (): Promise<void> => {
+    await client.post('/users/me/telegram/unlink')
+  },
+}

frontend/src/components/ActivityFeed.tsx

@@ -0,0 +1,282 @@
+import { useState, useEffect, useCallback, useRef, useImperativeHandle, forwardRef } from 'react'
+import { useNavigate } from 'react-router-dom'
+import { feedApi } from '@/api'
+import type { Activity, ActivityType } from '@/types'
+import { Loader2, ChevronDown, Bell, ExternalLink, AlertTriangle } from 'lucide-react'
+import {
+  formatRelativeTime,
+  getActivityIcon,
+  getActivityColor,
+  getActivityBgClass,
+  isEventActivity,
+  formatActivityMessage,
+} from '@/utils/activity'
+
+interface ActivityFeedProps {
+  marathonId: number
+  className?: string
+}
+
+export interface ActivityFeedRef {
+  refresh: () => void
+}
+
+const ITEMS_PER_PAGE = 20
+const POLL_INTERVAL = 10000 // 10 seconds
+
+// Важные типы активности для отображения
+const IMPORTANT_ACTIVITY_TYPES: ActivityType[] = [
+  'spin',
+  'complete',
+  'drop',
+  'start_marathon',
+  'finish_marathon',
+  'event_start',
+  'event_end',
+  'swap',
+  'rematch',
+]
+
+export const ActivityFeed = forwardRef<ActivityFeedRef, ActivityFeedProps>(
+  ({ marathonId, className = '' }, ref) => {
+    const [activities, setActivities] = useState<Activity[]>([])
+    const [isLoading, setIsLoading] = useState(true)
+    const [isLoadingMore, setIsLoadingMore] = useState(false)
+    const [hasMore, setHasMore] = useState(false)
+    const [total, setTotal] = useState(0)
+    const lastFetchRef = useRef<number>(0)
+
+    const loadActivities = useCallback(async (offset = 0, append = false) => {
+      try {
+        const response = await feedApi.get(marathonId, ITEMS_PER_PAGE * 2, offset)
+
+        // Фильтруем только важные события
+        const filtered = response.items.filter(item =>
+          IMPORTANT_ACTIVITY_TYPES.includes(item.type)
+        )
+
+        if (append) {
+          setActivities(prev => [...prev, ...filtered])
+        } else {
+          setActivities(filtered)
+        }
+
+        setHasMore(response.has_more)
+        setTotal(filtered.length)
+        lastFetchRef.current = Date.now()
+      } catch (error) {
+        console.error('Failed to load activity feed:', error)
+      }
+    }, [marathonId])
+
+    // Expose refresh method
+    useImperativeHandle(ref, () => ({
+      refresh: () => loadActivities()
+    }), [loadActivities])
+
+    // Initial load
+    useEffect(() => {
+      setIsLoading(true)
+      loadActivities().finally(() => setIsLoading(false))
+    }, [loadActivities])
+
+    // Polling for new activities
+    useEffect(() => {
+      const interval = setInterval(() => {
+        if (document.visibilityState === 'visible') {
+          loadActivities()
+        }
+      }, POLL_INTERVAL)
+
+      return () => clearInterval(interval)
+    }, [loadActivities])
+
+    const handleLoadMore = async () => {
+      setIsLoadingMore(true)
+      await loadActivities(activities.length, true)
+      setIsLoadingMore(false)
+    }
+
+    if (isLoading) {
+      return (
+        <div className={`bg-gray-800/50 rounded-xl border border-gray-700/50 p-4 flex flex-col ${className}`}>
+          <div className="flex items-center gap-2 mb-4">
+            <Bell className="w-5 h-5 text-primary-500" />
+            <h3 className="font-medium text-white">Активность</h3>
+          </div>
+          <div className="flex-1 flex items-center justify-center">
+            <Loader2 className="w-6 h-6 animate-spin text-gray-500" />
+          </div>
+        </div>
+      )
+    }
+
+    return (
+      <div className={`bg-gray-800/50 rounded-xl border border-gray-700/50 flex flex-col ${className}`}>
+        {/* Header */}
+        <div className="flex items-center justify-between px-4 py-3 border-b border-gray-700/50 flex-shrink-0">
+          <div className="flex items-center gap-2">
+            <Bell className="w-5 h-5 text-primary-500" />
+            <h3 className="font-medium text-white">Активность</h3>
+          </div>
+          {total > 0 && (
+            <span className="text-xs text-gray-500">{total}</span>
+          )}
+        </div>
+
+        {/* Activity list */}
+        <div className="flex-1 overflow-y-auto min-h-0 custom-scrollbar">
+          {activities.length === 0 ? (
+            <div className="px-4 py-8 text-center text-gray-500 text-sm">
+              Пока нет активности
+            </div>
+          ) : (
+            <div className="divide-y divide-gray-700/30">
+              {activities.map((activity) => (
+                <ActivityItem key={activity.id} activity={activity} />
+              ))}
+            </div>
+          )}
+
+          {/* Load more button */}
+          {hasMore && (
+            <div className="p-3 border-t border-gray-700/30">
+              <button
+                onClick={handleLoadMore}
+                disabled={isLoadingMore}
+                className="w-full py-2 text-sm text-gray-400 hover:text-white transition-colors flex items-center justify-center gap-2"
+              >
+                {isLoadingMore ? (
+                  <Loader2 className="w-4 h-4 animate-spin" />
+                ) : (
+                  <>
+                    <ChevronDown className="w-4 h-4" />
+                    Загрузить ещё
+                  </>
+                )}
+              </button>
+            </div>
+          )}
+        </div>
+      </div>
+    )
+  }
+)
+
+ActivityFeed.displayName = 'ActivityFeed'
+
+interface ActivityItemProps {
+  activity: Activity
+}
+
+function ActivityItem({ activity }: ActivityItemProps) {
+  const navigate = useNavigate()
+  const Icon = getActivityIcon(activity.type)
+  const iconColor = getActivityColor(activity.type)
+  const bgClass = getActivityBgClass(activity.type)
+  const isEvent = isEventActivity(activity.type)
+  const { title, details, extra } = formatActivityMessage(activity)
+
+  // Get assignment_id and dispute status for complete activities
+  const activityData = activity.data as { assignment_id?: number; dispute_status?: string } | null
+  const assignmentId = activity.type === 'complete' && activityData?.assignment_id
+    ? activityData.assignment_id
+    : null
+  const disputeStatus = activity.type === 'complete' && activityData?.dispute_status
+    ? activityData.dispute_status
+    : null
+
+  if (isEvent) {
+    return (
+      <div className={`px-4 py-3 ${bgClass} border-l-2 ${activity.type === 'event_start' ? 'border-l-yellow-500' : 'border-l-gray-600'}`}>
+        <div className="flex items-center gap-2 mb-1">
+          <Icon className={`w-4 h-4 ${iconColor}`} />
+          <span className={`text-sm font-medium ${activity.type === 'event_start' ? 'text-yellow-400' : 'text-gray-400'}`}>
+            {title}
+          </span>
+        </div>
+        {details && (
+          <div className={`text-sm ${activity.type === 'event_start' ? 'text-yellow-200' : 'text-gray-500'}`}>
+            {details}
+          </div>
+        )}
+        <div className="text-xs text-gray-500 mt-1">
+          {formatRelativeTime(activity.created_at)}
+        </div>
+      </div>
+    )
+  }
+
+  return (
+    <div className={`px-4 py-3 hover:bg-gray-700/20 transition-colors ${bgClass}`}>
+      <div className="flex items-start gap-3">
+        {/* Avatar */}
+        <div className="flex-shrink-0">
+          {activity.user.avatar_url ? (
+            <img
+              src={activity.user.avatar_url}
+              alt={activity.user.nickname}
+              className="w-8 h-8 rounded-full object-cover"
+            />
+          ) : (
+            <div className="w-8 h-8 rounded-full bg-gray-700 flex items-center justify-center">
+              <span className="text-xs text-gray-400 font-medium">
+                {activity.user.nickname.charAt(0).toUpperCase()}
+              </span>
+            </div>
+          )}
+        </div>
+
+        {/* Content */}
+        <div className="flex-1 min-w-0">
+          <div className="flex items-center gap-2 flex-wrap">
+            <span className="text-sm font-medium text-white truncate">
+              {activity.user.nickname}
+            </span>
+            <span className="text-xs text-gray-500">
+              {formatRelativeTime(activity.created_at)}
+            </span>
+          </div>
+          <div className="flex items-center gap-1.5 mt-0.5">
+            <Icon className={`w-3.5 h-3.5 flex-shrink-0 ${iconColor}`} />
+            <span className="text-sm text-gray-300">{title}</span>
+          </div>
+          {details && (
+            <div className="text-sm text-gray-400 mt-1">
+              {details}
+            </div>
+          )}
+          {extra && (
+            <div className="text-xs text-gray-500 mt-0.5">
+              {extra}
+            </div>
+          )}
+          {/* Details button and dispute indicator for complete activities */}
+          {assignmentId && (
+            <div className="flex items-center gap-3 mt-2">
+              <button
+                onClick={() => navigate(`/assignments/${assignmentId}`)}
+                className="text-xs text-primary-400 hover:text-primary-300 flex items-center gap-1"
+              >
+                <ExternalLink className="w-3 h-3" />
+                Детали
+              </button>
+              {disputeStatus === 'open' && (
+                <span className="text-xs text-orange-400 flex items-center gap-1">
+                  <AlertTriangle className="w-3 h-3" />
+                  Оспаривается
+                </span>
+              )}
+              {disputeStatus === 'valid' && (
+                <span className="text-xs text-red-400 flex items-center gap-1">
+                  <AlertTriangle className="w-3 h-3" />
+                  Отклонено
+                </span>
+              )}
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  )
+}

frontend/src/components/EventBanner.tsx

@@ -1,5 +1,5 @@
 import { useState, useEffect } from 'react'
-import { Zap, Users, Shield, Gift, ArrowLeftRight, RotateCcw, Clock } from 'lucide-react'
+import { Zap, Users, Shield, Gift, ArrowLeftRight, Gamepad2, Clock } from 'lucide-react'
 import type { ActiveEvent, EventType } from '@/types'
 import { EVENT_INFO } from '@/types'
 
@@ -14,7 +14,7 @@ const EVENT_ICONS: Record<EventType, React.ReactNode> = {
   double_risk: <Shield className="w-5 h-5" />,
   jackpot: <Gift className="w-5 h-5" />,
   swap: <ArrowLeftRight className="w-5 h-5" />,
-  rematch: <RotateCcw className="w-5 h-5" />,
+  game_choice: <Gamepad2 className="w-5 h-5" />,
 }
 
 const EVENT_COLORS: Record<EventType, string> = {
@@ -23,7 +23,7 @@ const EVENT_COLORS: Record<EventType, string> = {
   double_risk: 'from-purple-500/20 to-purple-600/20 border-purple-500/50 text-purple-400',
   jackpot: 'from-green-500/20 to-green-600/20 border-green-500/50 text-green-400',
   swap: 'from-blue-500/20 to-blue-600/20 border-blue-500/50 text-blue-400',
-  rematch: 'from-orange-500/20 to-orange-600/20 border-orange-500/50 text-orange-400',
+  game_choice: 'from-orange-500/20 to-orange-600/20 border-orange-500/50 text-orange-400',
 }
 
 function formatTime(seconds: number): string {

frontend/src/components/EventControl.tsx

@@ -1,9 +1,11 @@
 import { useState } from 'react'
-import { Zap, Users, Shield, Gift, ArrowLeftRight, RotateCcw, Play, Square } from 'lucide-react'
+import { Zap, Users, Shield, Gift, ArrowLeftRight, Gamepad2, Play, Square } from 'lucide-react'
 import { Button } from '@/components/ui'
 import { eventsApi } from '@/api'
 import type { ActiveEvent, EventType, Challenge } from '@/types'
 import { EVENT_INFO } from '@/types'
+import { useToast } from '@/store/toast'
+import { useConfirm } from '@/store/confirm'
 
 interface EventControlProps {
   marathonId: number
@@ -17,7 +19,7 @@ const EVENT_TYPES: EventType[] = [
   'double_risk',
   'jackpot',
   'swap',
-  'rematch',
+  'game_choice',
   'common_enemy',
 ]
 
@@ -27,7 +29,17 @@ const EVENT_ICONS: Record<EventType, React.ReactNode> = {
   double_risk: <Shield className="w-4 h-4" />,
   jackpot: <Gift className="w-4 h-4" />,
   swap: <ArrowLeftRight className="w-4 h-4" />,
-  rematch: <RotateCcw className="w-4 h-4" />,
+  game_choice: <Gamepad2 className="w-4 h-4" />,
+}
+
+// Default durations for events (in minutes)
+const DEFAULT_DURATIONS: Record<EventType, number | null> = {
+  golden_hour: 45,
+  common_enemy: null, // Until all complete
+  double_risk: 120,
+  jackpot: null, // 1 spin
+  swap: 60,
+  game_choice: 120,
 }
 
 export function EventControl({
@@ -36,14 +48,24 @@ export function EventControl({
   challenges,
   onEventChange,
 }: EventControlProps) {
+  const toast = useToast()
+  const confirm = useConfirm()
   const [selectedType, setSelectedType] = useState<EventType>('golden_hour')
   const [selectedChallengeId, setSelectedChallengeId] = useState<number | null>(null)
+  const [durationMinutes, setDurationMinutes] = useState<number | ''>(45)
   const [isStarting, setIsStarting] = useState(false)
   const [isStopping, setIsStopping] = useState(false)
 
+  // Update duration when event type changes
+  const handleTypeChange = (type: EventType) => {
+    setSelectedType(type)
+    const defaultDuration = DEFAULT_DURATIONS[type]
+    setDurationMinutes(defaultDuration ?? '')
+  }
+
   const handleStart = async () => {
     if (selectedType === 'common_enemy' && !selectedChallengeId) {
-      alert('Выберите челлендж для события "Общий враг"')
+      toast.warning('Выберите челлендж для события "Общий враг"')
       return
     }
 
@@ -51,19 +73,27 @@ export function EventControl({
     try {
       await eventsApi.start(marathonId, {
         type: selectedType,
+        duration_minutes: durationMinutes || undefined,
         challenge_id: selectedType === 'common_enemy' ? selectedChallengeId ?? undefined : undefined,
       })
       onEventChange()
     } catch (error) {
       console.error('Failed to start event:', error)
-      alert('Не удалось запустить событие')
+      toast.error('Не удалось запустить событие')
     } finally {
       setIsStarting(false)
     }
   }
 
   const handleStop = async () => {
-    if (!confirm('Остановить событие досрочно?')) return
+    const confirmed = await confirm({
+      title: 'Остановить событие?',
+      message: 'Событие будет завершено досрочно.',
+      confirmText: 'Остановить',
+      cancelText: 'Отмена',
+      variant: 'warning',
+    })
+    if (!confirmed) return
 
     setIsStopping(true)
     try {
@@ -108,7 +138,7 @@ export function EventControl({
         {EVENT_TYPES.map((type) => (
           <button
             key={type}
-            onClick={() => setSelectedType(type)}
+            onClick={() => handleTypeChange(type)}
             className={`
               p-3 rounded-lg border-2 transition-all text-left
               ${selectedType === type
@@ -127,6 +157,27 @@ export function EventControl({
         ))}
       </div>
 
+      {/* Duration setting */}
+      {DEFAULT_DURATIONS[selectedType] !== null && (
+        <div>
+          <label className="block text-sm font-medium text-gray-300 mb-2">
+            Длительность (минуты)
+          </label>
+          <input
+            type="number"
+            value={durationMinutes}
+            onChange={(e) => setDurationMinutes(e.target.value ? parseInt(e.target.value) : '')}
+            min={1}
+            max={480}
+            placeholder={`По умолчанию: ${DEFAULT_DURATIONS[selectedType]}`}
+            className="w-full p-2 bg-gray-700 border border-gray-600 rounded-lg text-white"
+          />
+          <p className="text-xs text-gray-500 mt-1">
+            Оставьте пустым для значения по умолчанию ({DEFAULT_DURATIONS[selectedType]} мин)
+          </p>
+        </div>
+      )}
+
       {selectedType === 'common_enemy' && challenges && challenges.length > 0 && (
         <div>
           <label className="block text-sm font-medium text-gray-300 mb-2">

frontend/src/components/TelegramLink.tsx

@@ -0,0 +1,325 @@
+import { useState, useEffect, useRef } from 'react'
+import { MessageCircle, ExternalLink, X, Loader2, RefreshCw, CheckCircle, User, Link2, Link2Off } from 'lucide-react'
+import { telegramApi } from '@/api/telegram'
+import { authApi } from '@/api/auth'
+import { useAuthStore } from '@/store/auth'
+
+export function TelegramLink() {
+  const { user, updateUser } = useAuthStore()
+  const [isOpen, setIsOpen] = useState(false)
+  const [loading, setLoading] = useState(false)
+  const [botUrl, setBotUrl] = useState<string | null>(null)
+  const [error, setError] = useState<string | null>(null)
+  const [isPolling, setIsPolling] = useState(false)
+  const [linkSuccess, setLinkSuccess] = useState(false)
+  const pollingRef = useRef<ReturnType<typeof setInterval> | null>(null)
+
+  const isLinked = !!user?.telegram_id
+
+  // Cleanup polling on unmount
+  useEffect(() => {
+    return () => {
+      if (pollingRef.current) {
+        clearInterval(pollingRef.current)
+      }
+    }
+  }, [])
+
+  const startPolling = () => {
+    setIsPolling(true)
+    let attempts = 0
+    const maxAttempts = 60 // 5 minutes (5 sec intervals)
+
+    pollingRef.current = setInterval(async () => {
+      attempts++
+      try {
+        const userData = await authApi.me()
+        if (userData.telegram_id) {
+          // Success! User linked their account
+          updateUser({
+            telegram_id: userData.telegram_id,
+            telegram_username: userData.telegram_username,
+            telegram_first_name: userData.telegram_first_name,
+            telegram_last_name: userData.telegram_last_name,
+            telegram_avatar_url: userData.telegram_avatar_url
+          })
+          setLinkSuccess(true)
+          setIsPolling(false)
+          setBotUrl(null)
+          if (pollingRef.current) {
+            clearInterval(pollingRef.current)
+          }
+        }
+      } catch {
+        // Ignore errors, continue polling
+      }
+
+      if (attempts >= maxAttempts) {
+        setIsPolling(false)
+        if (pollingRef.current) {
+          clearInterval(pollingRef.current)
+        }
+      }
+    }, 5000)
+  }
+
+  const stopPolling = () => {
+    setIsPolling(false)
+    if (pollingRef.current) {
+      clearInterval(pollingRef.current)
+    }
+  }
+
+  const handleGenerateLink = async () => {
+    setLoading(true)
+    setError(null)
+    setLinkSuccess(false)
+    try {
+      const { bot_url } = await telegramApi.generateLinkToken()
+      setBotUrl(bot_url)
+    } catch {
+      setError('Не удалось сгенерировать ссылку')
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  const handleUnlink = async () => {
+    setLoading(true)
+    setError(null)
+    try {
+      await telegramApi.unlinkTelegram()
+      updateUser({
+        telegram_id: null,
+        telegram_username: null,
+        telegram_first_name: null,
+        telegram_last_name: null,
+        telegram_avatar_url: null
+      })
+      setIsOpen(false)
+    } catch {
+      setError('Не удалось отвязать аккаунт')
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  const handleOpenBot = () => {
+    if (botUrl) {
+      window.open(botUrl, '_blank')
+      startPolling()
+    }
+  }
+
+  const handleClose = () => {
+    setIsOpen(false)
+    setBotUrl(null)
+    setError(null)
+    setLinkSuccess(false)
+    stopPolling()
+  }
+
+  return (
+    <>
+      <button
+        onClick={() => setIsOpen(true)}
+        className={`p-2 rounded-lg transition-colors ${
+          isLinked
+            ? 'text-blue-400 hover:text-blue-300 hover:bg-gray-700'
+            : 'text-gray-400 hover:text-white hover:bg-gray-700'
+        }`}
+        title={isLinked ? 'Telegram привязан' : 'Привязать Telegram'}
+      >
+        <MessageCircle className="w-5 h-5" />
+      </button>
+
+      {isOpen && (
+        <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-50 p-4">
+          <div className="bg-gray-800 rounded-xl max-w-md w-full p-6 relative">
+            <button
+              onClick={handleClose}
+              className="absolute top-4 right-4 text-gray-400 hover:text-white"
+            >
+              <X className="w-5 h-5" />
+            </button>
+
+            <div className="flex items-center gap-3 mb-6">
+              <div className="w-12 h-12 bg-blue-500/20 rounded-full flex items-center justify-center">
+                <MessageCircle className="w-6 h-6 text-blue-400" />
+              </div>
+              <div>
+                <h2 className="text-xl font-bold text-white">Telegram</h2>
+                <p className="text-sm text-gray-400">
+                  {isLinked ? 'Аккаунт привязан' : 'Привяжи аккаунт'}
+                </p>
+              </div>
+            </div>
+
+            {error && (
+              <div className="mb-4 p-3 bg-red-500/20 border border-red-500/50 rounded-lg text-red-400 text-sm">
+                {error}
+              </div>
+            )}
+
+            {isLinked || linkSuccess ? (
+              <div className="space-y-4">
+                {linkSuccess && (
+                  <div className="p-4 bg-green-500/20 border border-green-500/50 rounded-lg flex items-center gap-3">
+                    <CheckCircle className="w-6 h-6 text-green-400 flex-shrink-0" />
+                    <p className="text-green-400 font-medium">Аккаунт успешно привязан!</p>
+                  </div>
+                )}
+
+                {/* User Profile Card */}
+                <div className="p-4 bg-gradient-to-br from-gray-700/50 to-gray-800/50 rounded-xl border border-gray-600/50">
+                  <div className="flex items-center gap-4">
+                    {/* Avatar - prefer Telegram avatar */}
+                    <div className="relative">
+                      {user?.telegram_avatar_url || user?.avatar_url ? (
+                        <img
+                          src={user.telegram_avatar_url || user.avatar_url || ''}
+                          alt={user.nickname}
+                          className="w-16 h-16 rounded-full object-cover border-2 border-blue-500/50"
+                        />
+                      ) : (
+                        <div className="w-16 h-16 rounded-full bg-gradient-to-br from-blue-500 to-purple-600 flex items-center justify-center border-2 border-blue-500/50">
+                          <User className="w-8 h-8 text-white" />
+                        </div>
+                      )}
+                      {/* Link indicator */}
+                      <div className="absolute -bottom-1 -right-1 w-6 h-6 bg-green-500 rounded-full flex items-center justify-center border-2 border-gray-800">
+                        <Link2 className="w-3 h-3 text-white" />
+                      </div>
+                    </div>
+
+                    {/* User Info */}
+                    <div className="flex-1 min-w-0">
+                      <p className="text-lg font-bold text-white truncate">
+                        {[user?.telegram_first_name, user?.telegram_last_name].filter(Boolean).join(' ') || user?.nickname}
+                      </p>
+                      {user?.telegram_username && (
+                        <p className="text-blue-400 font-medium truncate">@{user.telegram_username}</p>
+                      )}
+                    </div>
+                  </div>
+                </div>
+
+                {/* Notifications Info */}
+                <div className="p-4 bg-gray-700/30 rounded-lg">
+                  <p className="text-sm text-gray-300 font-medium mb-3">Уведомления включены:</p>
+                  <div className="grid grid-cols-1 gap-2">
+                    <div className="flex items-center gap-2 text-sm text-gray-400">
+                      <span className="text-yellow-400">🌟</span>
+                      <span>События (Golden Hour, Jackpot)</span>
+                    </div>
+                    <div className="flex items-center gap-2 text-sm text-gray-400">
+                      <span className="text-green-400">🚀</span>
+                      <span>Старт и финиш марафонов</span>
+                    </div>
+                    <div className="flex items-center gap-2 text-sm text-gray-400">
+                      <span className="text-red-400">⚠️</span>
+                      <span>Споры по заданиям</span>
+                    </div>
+                  </div>
+                </div>
+
+                <button
+                  onClick={handleUnlink}
+                  disabled={loading}
+                  className="w-full py-3 px-4 bg-red-500/10 hover:bg-red-500/20 text-red-400 rounded-lg font-medium transition-colors disabled:opacity-50 flex items-center justify-center gap-2 border border-red-500/30"
+                >
+                  {loading ? (
+                    <Loader2 className="w-5 h-5 animate-spin" />
+                  ) : (
+                    <>
+                      <Link2Off className="w-4 h-4" />
+                      Отвязать аккаунт
+                    </>
+                  )}
+                </button>
+              </div>
+            ) : botUrl ? (
+              <div className="space-y-4">
+                {isPolling ? (
+                  <>
+                    <div className="p-4 bg-blue-500/20 border border-blue-500/50 rounded-lg">
+                      <div className="flex items-center gap-3 mb-2">
+                        <RefreshCw className="w-5 h-5 text-blue-400 animate-spin" />
+                        <p className="text-blue-400 font-medium">Ожидание привязки...</p>
+                      </div>
+                      <p className="text-sm text-gray-400">
+                        Открой бота в Telegram и нажми Start. Статус обновится автоматически.
+                      </p>
+                    </div>
+
+                    <button
+                      onClick={handleOpenBot}
+                      className="w-full py-3 px-4 bg-blue-500 hover:bg-blue-600 text-white rounded-lg font-medium transition-colors flex items-center justify-center gap-2"
+                    >
+                      <ExternalLink className="w-5 h-5" />
+                      Открыть Telegram снова
+                    </button>
+                  </>
+                ) : (
+                  <>
+                    <p className="text-gray-300">
+                      Нажми кнопку ниже, чтобы открыть бота и завершить привязку:
+                    </p>
+
+                    <button
+                      onClick={handleOpenBot}
+                      className="w-full py-3 px-4 bg-blue-500 hover:bg-blue-600 text-white rounded-lg font-medium transition-colors flex items-center justify-center gap-2"
+                    >
+                      <ExternalLink className="w-5 h-5" />
+                      Открыть Telegram
+                    </button>
+
+                    <p className="text-sm text-gray-500 text-center">
+                      Ссылка действительна 10 минут
+                    </p>
+                  </>
+                )}
+              </div>
+            ) : (
+              <div className="space-y-4">
+                <p className="text-gray-300">
+                  Привяжи Telegram, чтобы получать уведомления о важных событиях:
+                </p>
+
+                <ul className="text-sm text-gray-400 space-y-2">
+                  <li className="flex items-center gap-2">
+                    <span className="text-yellow-400">🌟</span>
+                    Golden Hour - очки x1.5
+                  </li>
+                  <li className="flex items-center gap-2">
+                    <span className="text-yellow-400">🎰</span>
+                    Jackpot - очки x3
+                  </li>
+                  <li className="flex items-center gap-2">
+                    <span className="text-yellow-400">⚡</span>
+                    Double Risk и другие события
+                  </li>
+                </ul>
+
+                <button
+                  onClick={handleGenerateLink}
+                  disabled={loading}
+                  className="w-full py-3 px-4 bg-blue-500 hover:bg-blue-600 text-white rounded-lg font-medium transition-colors disabled:opacity-50 flex items-center justify-center gap-2"
+                >
+                  {loading ? (
+                    <Loader2 className="w-5 h-5 animate-spin" />
+                  ) : (
+                    <>
+                      <MessageCircle className="w-5 h-5" />
+                      Привязать Telegram
+                    </>
+                  )}
+                </button>
+              </div>
+            )}
+          </div>
+        </div>
+      )}
+    </>
+  )
+}

frontend/src/components/layout/Layout.tsx

@@ -1,6 +1,7 @@
 import { Outlet, Link, useNavigate } from 'react-router-dom'
 import { useAuthStore } from '@/store/auth'
 import { Gamepad2, LogOut, Trophy, User } from 'lucide-react'
+import { TelegramLink } from '@/components/TelegramLink'
 
 export function Layout() {
   const { user, isAuthenticated, logout } = useAuthStore()
@@ -38,6 +39,8 @@ export function Layout() {
                     <span>{user?.nickname}</span>
                   </div>
 
+                  <TelegramLink />
+
                   <button
                     onClick={handleLogout}
                     className="p-2 text-gray-400 hover:text-white transition-colors"

frontend/src/components/ui/ConfirmModal.tsx

@@ -0,0 +1,111 @@
+import { useEffect } from 'react'
+import { AlertTriangle, Info, Trash2, X } from 'lucide-react'
+import { clsx } from 'clsx'
+import { useConfirmStore, type ConfirmVariant } from '@/store/confirm'
+import { Button } from './Button'
+
+const icons: Record<ConfirmVariant, React.ReactNode> = {
+  danger: <Trash2 className="w-6 h-6" />,
+  warning: <AlertTriangle className="w-6 h-6" />,
+  info: <Info className="w-6 h-6" />,
+}
+
+const iconStyles: Record<ConfirmVariant, string> = {
+  danger: 'bg-red-500/20 text-red-500',
+  warning: 'bg-yellow-500/20 text-yellow-500',
+  info: 'bg-blue-500/20 text-blue-500',
+}
+
+const buttonVariants: Record<ConfirmVariant, 'danger' | 'primary' | 'secondary'> = {
+  danger: 'danger',
+  warning: 'primary',
+  info: 'primary',
+}
+
+export function ConfirmModal() {
+  const { isOpen, options, handleConfirm, handleCancel } = useConfirmStore()
+
+  // Handle escape key
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Escape' && isOpen) {
+        handleCancel()
+      }
+    }
+    window.addEventListener('keydown', handleKeyDown)
+    return () => window.removeEventListener('keydown', handleKeyDown)
+  }, [isOpen, handleCancel])
+
+  // Prevent body scroll when modal is open
+  useEffect(() => {
+    if (isOpen) {
+      document.body.style.overflow = 'hidden'
+    } else {
+      document.body.style.overflow = ''
+    }
+    return () => {
+      document.body.style.overflow = ''
+    }
+  }, [isOpen])
+
+  if (!isOpen || !options) return null
+
+  const variant = options.variant || 'warning'
+  const Icon = icons[variant]
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center p-4">
+      {/* Backdrop */}
+      <div
+        className="absolute inset-0 bg-black/70 backdrop-blur-sm animate-in fade-in duration-200"
+        onClick={handleCancel}
+      />
+
+      {/* Modal */}
+      <div className="relative bg-gray-800 rounded-xl shadow-2xl max-w-md w-full animate-in zoom-in-95 fade-in duration-200 border border-gray-700">
+        {/* Close button */}
+        <button
+          onClick={handleCancel}
+          className="absolute top-4 right-4 text-gray-400 hover:text-white transition-colors"
+        >
+          <X className="w-5 h-5" />
+        </button>
+
+        <div className="p-6">
+          {/* Icon */}
+          <div className={clsx('w-12 h-12 rounded-full flex items-center justify-center mb-4', iconStyles[variant])}>
+            {Icon}
+          </div>
+
+          {/* Title */}
+          <h3 className="text-xl font-bold text-white mb-2">
+            {options.title}
+          </h3>
+
+          {/* Message */}
+          <p className="text-gray-400 mb-6 whitespace-pre-line">
+            {options.message}
+          </p>
+
+          {/* Actions */}
+          <div className="flex gap-3">
+            <Button
+              variant="secondary"
+              className="flex-1"
+              onClick={handleCancel}
+            >
+              {options.cancelText || 'Отмена'}
+            </Button>
+            <Button
+              variant={buttonVariants[variant]}
+              className="flex-1"
+              onClick={handleConfirm}
+            >
+              {options.confirmText || 'Подтвердить'}
+            </Button>
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}

frontend/src/components/ui/Toast.tsx

@@ -0,0 +1,83 @@
+import { useEffect, useState } from 'react'
+import { X, CheckCircle, XCircle, AlertTriangle, Info } from 'lucide-react'
+import { clsx } from 'clsx'
+import { useToastStore, type Toast as ToastType } from '@/store/toast'
+
+const icons = {
+  success: CheckCircle,
+  error: XCircle,
+  warning: AlertTriangle,
+  info: Info,
+}
+
+const styles = {
+  success: 'bg-green-500/20 border-green-500/50 text-green-400',
+  error: 'bg-red-500/20 border-red-500/50 text-red-400',
+  warning: 'bg-yellow-500/20 border-yellow-500/50 text-yellow-400',
+  info: 'bg-blue-500/20 border-blue-500/50 text-blue-400',
+}
+
+const iconStyles = {
+  success: 'text-green-500',
+  error: 'text-red-500',
+  warning: 'text-yellow-500',
+  info: 'text-blue-500',
+}
+
+interface ToastItemProps {
+  toast: ToastType
+  onRemove: (id: string) => void
+}
+
+function ToastItem({ toast, onRemove }: ToastItemProps) {
+  const [isVisible, setIsVisible] = useState(false)
+  const [isLeaving, setIsLeaving] = useState(false)
+  const Icon = icons[toast.type]
+
+  useEffect(() => {
+    // Trigger enter animation
+    requestAnimationFrame(() => setIsVisible(true))
+  }, [])
+
+  const handleRemove = () => {
+    setIsLeaving(true)
+    setTimeout(() => onRemove(toast.id), 200)
+  }
+
+  return (
+    <div
+      className={clsx(
+        'flex items-start gap-3 p-4 rounded-lg border backdrop-blur-sm shadow-lg',
+        'transition-all duration-200 ease-out',
+        styles[toast.type],
+        isVisible && !isLeaving ? 'translate-x-0 opacity-100' : 'translate-x-full opacity-0'
+      )}
+    >
+      <Icon className={clsx('w-5 h-5 flex-shrink-0 mt-0.5', iconStyles[toast.type])} />
+      <p className="flex-1 text-sm text-white">{toast.message}</p>
+      <button
+        onClick={handleRemove}
+        className="flex-shrink-0 text-gray-400 hover:text-white transition-colors"
+      >
+        <X className="w-4 h-4" />
+      </button>
+    </div>
+  )
+}
+
+export function ToastContainer() {
+  const toasts = useToastStore((state) => state.toasts)
+  const removeToast = useToastStore((state) => state.removeToast)
+
+  if (toasts.length === 0) return null
+
+  return (
+    <div className="fixed bottom-4 right-4 z-50 flex flex-col gap-2 max-w-sm w-full pointer-events-none">
+      {toasts.map((toast) => (
+        <div key={toast.id} className="pointer-events-auto">
+          <ToastItem toast={toast} onRemove={removeToast} />
+        </div>
+      ))}
+    </div>
+  )
+}

frontend/src/components/ui/index.ts

@@ -1,3 +1,5 @@
 export { Button } from './Button'
 export { Input } from './Input'
 export { Card, CardHeader, CardTitle, CardContent } from './Card'
+export { ToastContainer } from './Toast'
+export { ConfirmModal } from './ConfirmModal'

frontend/src/index.css

@@ -6,6 +6,30 @@ body {
   @apply bg-gray-900 text-gray-100 min-h-screen;
 }
 
+/* Custom scrollbar styles */
+.custom-scrollbar::-webkit-scrollbar {
+  width: 6px;
+}
+
+.custom-scrollbar::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+.custom-scrollbar::-webkit-scrollbar-thumb {
+  background: #4b5563;
+  border-radius: 3px;
+}
+
+.custom-scrollbar::-webkit-scrollbar-thumb:hover {
+  background: #6b7280;
+}
+
+/* Firefox */
+.custom-scrollbar {
+  scrollbar-width: thin;
+  scrollbar-color: #4b5563 transparent;
+}
+
 @layer components {
   .btn {
     @apply px-4 py-2 rounded-lg font-medium transition-colors duration-200 disabled:opacity-50 disabled:cursor-not-allowed;

frontend/src/pages/AssignmentDetailPage.tsx

@@ -0,0 +1,515 @@
+import { useState, useEffect } from 'react'
+import { useParams, useNavigate } from 'react-router-dom'
+import { assignmentsApi } from '@/api'
+import type { AssignmentDetail } from '@/types'
+import { Card, CardContent, Button } from '@/components/ui'
+import { useAuthStore } from '@/store/auth'
+import { useToast } from '@/store/toast'
+import {
+  ArrowLeft, Loader2, ExternalLink, Image, MessageSquare,
+  ThumbsUp, ThumbsDown, AlertTriangle, Clock, CheckCircle, XCircle,
+  Send, Flag
+} from 'lucide-react'
+
+export function AssignmentDetailPage() {
+  const { id } = useParams<{ id: string }>()
+  const navigate = useNavigate()
+  const user = useAuthStore((state) => state.user)
+  const toast = useToast()
+
+  const [assignment, setAssignment] = useState<AssignmentDetail | null>(null)
+  const [isLoading, setIsLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+  const [proofMediaBlobUrl, setProofMediaBlobUrl] = useState<string | null>(null)
+  const [proofMediaType, setProofMediaType] = useState<'image' | 'video' | null>(null)
+
+  // Dispute creation
+  const [showDisputeForm, setShowDisputeForm] = useState(false)
+  const [disputeReason, setDisputeReason] = useState('')
+  const [isCreatingDispute, setIsCreatingDispute] = useState(false)
+
+  // Comment
+  const [commentText, setCommentText] = useState('')
+  const [isAddingComment, setIsAddingComment] = useState(false)
+
+  // Voting
+  const [isVoting, setIsVoting] = useState(false)
+
+  useEffect(() => {
+    loadAssignment()
+    return () => {
+      // Cleanup blob URL on unmount
+      if (proofMediaBlobUrl) {
+        URL.revokeObjectURL(proofMediaBlobUrl)
+      }
+    }
+  }, [id])
+
+  const loadAssignment = async () => {
+    if (!id) return
+    setIsLoading(true)
+    setError(null)
+    try {
+      const data = await assignmentsApi.getDetail(parseInt(id))
+      setAssignment(data)
+
+      // Load proof media if exists
+      if (data.proof_image_url) {
+        try {
+          const { url, type } = await assignmentsApi.getProofMediaUrl(parseInt(id))
+          setProofMediaBlobUrl(url)
+          setProofMediaType(type)
+        } catch {
+          // Ignore error, media just won't show
+        }
+      }
+    } catch (err: unknown) {
+      const error = err as { response?: { data?: { detail?: string } } }
+      setError(error.response?.data?.detail || 'Не удалось загрузить данные')
+    } finally {
+      setIsLoading(false)
+    }
+  }
+
+  const handleCreateDispute = async () => {
+    if (!id || !disputeReason.trim()) return
+
+    setIsCreatingDispute(true)
+    try {
+      await assignmentsApi.createDispute(parseInt(id), disputeReason)
+      setDisputeReason('')
+      setShowDisputeForm(false)
+      await loadAssignment()
+    } catch (err: unknown) {
+      const error = err as { response?: { data?: { detail?: string } } }
+      toast.error(error.response?.data?.detail || 'Не удалось создать оспаривание')
+    } finally {
+      setIsCreatingDispute(false)
+    }
+  }
+
+  const handleVote = async (vote: boolean) => {
+    if (!assignment?.dispute) return
+
+    setIsVoting(true)
+    try {
+      await assignmentsApi.vote(assignment.dispute.id, vote)
+      await loadAssignment()
+    } catch (err: unknown) {
+      const error = err as { response?: { data?: { detail?: string } } }
+      toast.error(error.response?.data?.detail || 'Не удалось проголосовать')
+    } finally {
+      setIsVoting(false)
+    }
+  }
+
+  const handleAddComment = async () => {
+    if (!assignment?.dispute || !commentText.trim()) return
+
+    setIsAddingComment(true)
+    try {
+      await assignmentsApi.addComment(assignment.dispute.id, commentText)
+      setCommentText('')
+      await loadAssignment()
+    } catch (err: unknown) {
+      const error = err as { response?: { data?: { detail?: string } } }
+      toast.error(error.response?.data?.detail || 'Не удалось добавить комментарий')
+    } finally {
+      setIsAddingComment(false)
+    }
+  }
+
+  const formatDate = (dateString: string) => {
+    return new Date(dateString).toLocaleString('ru-RU', {
+      day: 'numeric',
+      month: 'long',
+      year: 'numeric',
+      hour: '2-digit',
+      minute: '2-digit',
+    })
+  }
+
+  const getTimeRemaining = (expiresAt: string) => {
+    const now = new Date()
+    const expires = new Date(expiresAt)
+    const diff = expires.getTime() - now.getTime()
+
+    if (diff <= 0) return 'Истекло'
+
+    const hours = Math.floor(diff / (1000 * 60 * 60))
+    const minutes = Math.floor((diff % (1000 * 60 * 60)) / (1000 * 60))
+
+    return `${hours}ч ${minutes}м`
+  }
+
+  const getStatusBadge = (status: string) => {
+    switch (status) {
+      case 'completed':
+        return (
+          <span className="px-3 py-1 bg-green-500/20 text-green-400 rounded-full text-sm flex items-center gap-1">
+            <CheckCircle className="w-4 h-4" /> Выполнено
+          </span>
+        )
+      case 'dropped':
+        return (
+          <span className="px-3 py-1 bg-red-500/20 text-red-400 rounded-full text-sm flex items-center gap-1">
+            <XCircle className="w-4 h-4" /> Пропущено
+          </span>
+        )
+      case 'returned':
+        return (
+          <span className="px-3 py-1 bg-orange-500/20 text-orange-400 rounded-full text-sm flex items-center gap-1">
+            <AlertTriangle className="w-4 h-4" /> Возвращено
+          </span>
+        )
+      default:
+        return (
+          <span className="px-3 py-1 bg-blue-500/20 text-blue-400 rounded-full text-sm">
+            Активно
+          </span>
+        )
+    }
+  }
+
+  if (isLoading) {
+    return (
+      <div className="flex justify-center py-12">
+        <Loader2 className="w-8 h-8 animate-spin text-primary-500" />
+      </div>
+    )
+  }
+
+  if (error || !assignment) {
+    return (
+      <div className="max-w-2xl mx-auto text-center py-12">
+        <p className="text-red-400 mb-4">{error || 'Задание не найдено'}</p>
+        <Button onClick={() => navigate(-1)}>Назад</Button>
+      </div>
+    )
+  }
+
+  const dispute = assignment.dispute
+
+  return (
+    <div className="max-w-2xl mx-auto">
+      {/* Header */}
+      <div className="flex items-center gap-4 mb-6">
+        <button onClick={() => navigate(-1)} className="text-gray-400 hover:text-white">
+          <ArrowLeft className="w-6 h-6" />
+        </button>
+        <h1 className="text-xl font-bold text-white">Детали выполнения</h1>
+      </div>
+
+      {/* Challenge info */}
+      <Card className="mb-6">
+        <CardContent>
+          <div className="flex items-start justify-between mb-4">
+            <div>
+              <p className="text-gray-400 text-sm">{assignment.challenge.game.title}</p>
+              <h2 className="text-xl font-bold text-white">{assignment.challenge.title}</h2>
+            </div>
+            {getStatusBadge(assignment.status)}
+          </div>
+
+          <p className="text-gray-300 mb-4">{assignment.challenge.description}</p>
+
+          <div className="flex flex-wrap gap-2 mb-4">
+            <span className="px-3 py-1 bg-green-500/20 text-green-400 rounded-full text-sm">
+              +{assignment.challenge.points} очков
+            </span>
+            <span className="px-3 py-1 bg-gray-700 text-gray-300 rounded-full text-sm">
+              {assignment.challenge.difficulty}
+            </span>
+            {assignment.challenge.estimated_time && (
+              <span className="px-3 py-1 bg-gray-700 text-gray-300 rounded-full text-sm">
+                ~{assignment.challenge.estimated_time} мин
+              </span>
+            )}
+          </div>
+
+          <div className="text-sm text-gray-400 space-y-1">
+            <p>
+              <strong>Выполнил:</strong> {assignment.participant.nickname}
+            </p>
+            {assignment.completed_at && (
+              <p>
+                <strong>Дата:</strong> {formatDate(assignment.completed_at)}
+              </p>
+            )}
+            {assignment.points_earned > 0 && (
+              <p>
+                <strong>Получено очков:</strong> {assignment.points_earned}
+              </p>
+            )}
+          </div>
+        </CardContent>
+      </Card>
+
+      {/* Proof section */}
+      <Card className="mb-6">
+        <CardContent>
+          <h3 className="text-lg font-bold text-white mb-4 flex items-center gap-2">
+            <Image className="w-5 h-5" />
+            Доказательство
+          </h3>
+
+          {/* Proof media (image or video) */}
+          {assignment.proof_image_url && (
+            <div className="mb-4">
+              {proofMediaBlobUrl ? (
+                proofMediaType === 'video' ? (
+                  <video
+                    src={proofMediaBlobUrl}
+                    controls
+                    className="w-full rounded-lg max-h-96 bg-gray-900"
+                    preload="metadata"
+                  />
+                ) : (
+                  <img
+                    src={proofMediaBlobUrl}
+                    alt="Proof"
+                    className="w-full rounded-lg max-h-96 object-contain bg-gray-900"
+                  />
+                )
+              ) : (
+                <div className="w-full h-48 bg-gray-900 rounded-lg flex items-center justify-center">
+                  <Loader2 className="w-8 h-8 animate-spin text-gray-500" />
+                </div>
+              )}
+            </div>
+          )}
+
+          {/* Proof URL */}
+          {assignment.proof_url && (
+            <div className="mb-4">
+              <a
+                href={assignment.proof_url}
+                target="_blank"
+                rel="noopener noreferrer"
+                className="flex items-center gap-2 text-primary-400 hover:text-primary-300"
+              >
+                <ExternalLink className="w-4 h-4" />
+                {assignment.proof_url}
+              </a>
+            </div>
+          )}
+
+          {/* Proof comment */}
+          {assignment.proof_comment && (
+            <div className="p-3 bg-gray-900 rounded-lg">
+              <p className="text-sm text-gray-400 mb-1">Комментарий:</p>
+              <p className="text-white">{assignment.proof_comment}</p>
+            </div>
+          )}
+
+          {!assignment.proof_image_url && !assignment.proof_url && (
+            <p className="text-gray-500 text-center py-4">Пруф не предоставлен</p>
+          )}
+        </CardContent>
+      </Card>
+
+      {/* Dispute button */}
+      {assignment.can_dispute && !dispute && !showDisputeForm && (
+        <Button
+          variant="danger"
+          className="w-full mb-6"
+          onClick={() => setShowDisputeForm(true)}
+        >
+          <Flag className="w-4 h-4 mr-2" />
+          Оспорить выполнение
+        </Button>
+      )}
+
+      {/* Dispute creation form */}
+      {showDisputeForm && !dispute && (
+        <Card className="mb-6 border-red-500/50">
+          <CardContent>
+            <h3 className="text-lg font-bold text-red-400 mb-4 flex items-center gap-2">
+              <AlertTriangle className="w-5 h-5" />
+              Оспорить выполнение
+            </h3>
+
+            <p className="text-gray-400 text-sm mb-4">
+              Опишите причину оспаривания. После создания у участников будет 24 часа для голосования.
+            </p>
+
+            <textarea
+              className="input w-full min-h-[100px] resize-none mb-4"
+              placeholder="Причина оспаривания (минимум 10 символов)..."
+              value={disputeReason}
+              onChange={(e) => setDisputeReason(e.target.value)}
+            />
+
+            <div className="flex gap-3">
+              <Button
+                variant="danger"
+                className="flex-1"
+                onClick={handleCreateDispute}
+                isLoading={isCreatingDispute}
+                disabled={disputeReason.trim().length < 10}
+              >
+                Оспорить
+              </Button>
+              <Button
+                variant="secondary"
+                onClick={() => {
+                  setShowDisputeForm(false)
+                  setDisputeReason('')
+                }}
+              >
+                Отмена
+              </Button>
+            </div>
+          </CardContent>
+        </Card>
+      )}
+
+      {/* Dispute section */}
+      {dispute && (
+        <Card className={`mb-6 ${dispute.status === 'open' ? 'border-yellow-500/50' : ''}`}>
+          <CardContent>
+            <div className="flex items-start justify-between mb-4">
+              <h3 className="text-lg font-bold text-yellow-400 flex items-center gap-2">
+                <AlertTriangle className="w-5 h-5" />
+                Оспаривание
+              </h3>
+
+              {dispute.status === 'open' ? (
+                <span className="px-3 py-1 bg-yellow-500/20 text-yellow-400 rounded-full text-sm flex items-center gap-1">
+                  <Clock className="w-4 h-4" />
+                  {getTimeRemaining(dispute.expires_at)}
+                </span>
+              ) : dispute.status === 'valid' ? (
+                <span className="px-3 py-1 bg-green-500/20 text-green-400 rounded-full text-sm flex items-center gap-1">
+                  <CheckCircle className="w-4 h-4" />
+                  Пруф валиден
+                </span>
+              ) : (
+                <span className="px-3 py-1 bg-red-500/20 text-red-400 rounded-full text-sm flex items-center gap-1">
+                  <XCircle className="w-4 h-4" />
+                  Пруф невалиден
+                </span>
+              )}
+            </div>
+
+            <div className="mb-4">
+              <p className="text-sm text-gray-400">
+                Открыл: <span className="text-white">{dispute.raised_by.nickname}</span>
+              </p>
+              <p className="text-sm text-gray-400">
+                Дата: <span className="text-white">{formatDate(dispute.created_at)}</span>
+              </p>
+            </div>
+
+            <div className="p-3 bg-gray-900 rounded-lg mb-4">
+              <p className="text-sm text-gray-400 mb-1">Причина:</p>
+              <p className="text-white">{dispute.reason}</p>
+            </div>
+
+            {/* Voting section */}
+            {dispute.status === 'open' && (
+              <div className="mb-4">
+                <h4 className="text-sm font-medium text-gray-300 mb-3">Голосование</h4>
+
+                <div className="flex items-center gap-4 mb-3">
+                  <div className="flex items-center gap-2">
+                    <ThumbsUp className="w-5 h-5 text-green-500" />
+                    <span className="text-green-400 font-medium">{dispute.votes_valid}</span>
+                    <span className="text-gray-500 text-sm">валидно</span>
+                  </div>
+                  <div className="flex items-center gap-2">
+                    <ThumbsDown className="w-5 h-5 text-red-500" />
+                    <span className="text-red-400 font-medium">{dispute.votes_invalid}</span>
+                    <span className="text-gray-500 text-sm">невалидно</span>
+                  </div>
+                </div>
+
+                <div className="flex gap-3">
+                  <Button
+                    variant={dispute.my_vote === true ? 'primary' : 'secondary'}
+                    className="flex-1"
+                    onClick={() => handleVote(true)}
+                    isLoading={isVoting}
+                    disabled={isVoting}
+                  >
+                    <ThumbsUp className="w-4 h-4 mr-2" />
+                    Валидно
+                  </Button>
+                  <Button
+                    variant={dispute.my_vote === false ? 'danger' : 'secondary'}
+                    className="flex-1"
+                    onClick={() => handleVote(false)}
+                    isLoading={isVoting}
+                    disabled={isVoting}
+                  >
+                    <ThumbsDown className="w-4 h-4 mr-2" />
+                    Невалидно
+                  </Button>
+                </div>
+
+                {dispute.my_vote !== null && (
+                  <p className="text-sm text-gray-500 mt-2 text-center">
+                    Вы проголосовали: {dispute.my_vote ? 'валидно' : 'невалидно'}
+                  </p>
+                )}
+              </div>
+            )}
+
+            {/* Comments section */}
+            <div>
+              <h4 className="text-sm font-medium text-gray-300 mb-3 flex items-center gap-2">
+                <MessageSquare className="w-4 h-4" />
+                Обсуждение ({dispute.comments.length})
+              </h4>
+
+              {dispute.comments.length > 0 && (
+                <div className="space-y-3 mb-4 max-h-60 overflow-y-auto">
+                  {dispute.comments.map((comment) => (
+                    <div key={comment.id} className="p-3 bg-gray-900 rounded-lg">
+                      <div className="flex items-center justify-between mb-1">
+                        <span className={`font-medium ${comment.user.id === user?.id ? 'text-primary-400' : 'text-white'}`}>
+                          {comment.user.nickname}
+                          {comment.user.id === user?.id && ' (Вы)'}
+                        </span>
+                        <span className="text-xs text-gray-500">
+                          {formatDate(comment.created_at)}
+                        </span>
+                      </div>
+                      <p className="text-gray-300 text-sm">{comment.text}</p>
+                    </div>
+                  ))}
+                </div>
+              )}
+
+              {/* Add comment form */}
+              {dispute.status === 'open' && (
+                <div className="flex gap-2">
+                  <input
+                    type="text"
+                    className="input flex-1"
+                    placeholder="Написать комментарий..."
+                    value={commentText}
+                    onChange={(e) => setCommentText(e.target.value)}
+                    onKeyDown={(e) => {
+                      if (e.key === 'Enter' && !e.shiftKey) {
+                        e.preventDefault()
+                        handleAddComment()
+                      }
+                    }}
+                  />
+                  <Button
+                    onClick={handleAddComment}
+                    isLoading={isAddingComment}
+                    disabled={!commentText.trim()}
+                  >
+                    <Send className="w-4 h-4" />
+                  </Button>
+                </div>
+              )}
+            </div>
+          </CardContent>
+        </Card>
+      )}
+    </div>
+  )
+}

frontend/src/pages/LobbyPage.tsx

@@ -4,6 +4,8 @@ import { marathonsApi, gamesApi } from '@/api'
 import type { Marathon, Game, Challenge, ChallengePreview } from '@/types'
 import { Button, Input, Card, CardContent, CardHeader, CardTitle } from '@/components/ui'
 import { useAuthStore } from '@/store/auth'
+import { useToast } from '@/store/toast'
+import { useConfirm } from '@/store/confirm'
 import {
   Plus, Trash2, Sparkles, Play, Loader2, Gamepad2, X, Save, Eye,
   ChevronDown, ChevronUp, Edit2, Check, CheckCircle, XCircle, Clock, User, ArrowLeft
@@ -13,6 +15,8 @@ export function LobbyPage() {
   const { id } = useParams<{ id: string }>()
   const navigate = useNavigate()
   const user = useAuthStore((state) => state.user)
+  const toast = useToast()
+  const confirm = useConfirm()
 
   const [marathon, setMarathon] = useState<Marathon | null>(null)
   const [games, setGames] = useState<Game[]>([])
@@ -41,6 +45,20 @@ export function LobbyPage() {
   const [gameChallenges, setGameChallenges] = useState<Record<number, Challenge[]>>({})
   const [loadingChallenges, setLoadingChallenges] = useState<number | null>(null)
 
+  // Manual challenge creation
+  const [addingChallengeToGameId, setAddingChallengeToGameId] = useState<number | null>(null)
+  const [newChallenge, setNewChallenge] = useState({
+    title: '',
+    description: '',
+    type: 'completion',
+    difficulty: 'medium',
+    points: 50,
+    estimated_time: 30,
+    proof_type: 'screenshot',
+    proof_hint: '',
+  })
+  const [isCreatingChallenge, setIsCreatingChallenge] = useState(false)
+
   // Start marathon
   const [isStarting, setIsStarting] = useState(false)
 
@@ -99,7 +117,14 @@ export function LobbyPage() {
   }
 
   const handleDeleteGame = async (gameId: number) => {
-    if (!confirm('Удалить эту игру?')) return
+    const confirmed = await confirm({
+      title: 'Удалить игру?',
+      message: 'Игра и все её челленджи будут удалены.',
+      confirmText: 'Удалить',
+      cancelText: 'Отмена',
+      variant: 'danger',
+    })
+    if (!confirmed) return
 
     try {
       await gamesApi.delete(gameId)
@@ -122,7 +147,14 @@ export function LobbyPage() {
   }
 
   const handleRejectGame = async (gameId: number) => {
-    if (!confirm('Отклонить эту игру?')) return
+    const confirmed = await confirm({
+      title: 'Отклонить игру?',
+      message: 'Игра будет удалена из списка ожидающих.',
+      confirmText: 'Отклонить',
+      cancelText: 'Отмена',
+      variant: 'danger',
+    })
+    if (!confirmed) return
 
     setModeratingGameId(gameId)
     try {
@@ -143,6 +175,7 @@ export function LobbyPage() {
 
     setExpandedGameId(gameId)
 
+    // Load challenges if we haven't loaded them yet
     if (!gameChallenges[gameId]) {
       setLoadingChallenges(gameId)
       try {
@@ -150,14 +183,66 @@ export function LobbyPage() {
         setGameChallenges(prev => ({ ...prev, [gameId]: challenges }))
       } catch (error) {
         console.error('Failed to load challenges:', error)
+        // Set empty array to prevent repeated attempts
+        setGameChallenges(prev => ({ ...prev, [gameId]: [] }))
       } finally {
         setLoadingChallenges(null)
       }
     }
   }
 
+  const handleCreateChallenge = async (gameId: number) => {
+    if (!newChallenge.title.trim() || !newChallenge.description.trim()) {
+      toast.warning('Заполните название и описание')
+      return
+    }
+
+    setIsCreatingChallenge(true)
+    try {
+      await gamesApi.createChallenge(gameId, {
+        title: newChallenge.title.trim(),
+        description: newChallenge.description.trim(),
+        type: newChallenge.type,
+        difficulty: newChallenge.difficulty,
+        points: newChallenge.points,
+        estimated_time: newChallenge.estimated_time || undefined,
+        proof_type: newChallenge.proof_type,
+        proof_hint: newChallenge.proof_hint.trim() || undefined,
+      })
+      toast.success('Задание добавлено')
+      // Reset form
+      setNewChallenge({
+        title: '',
+        description: '',
+        type: 'completion',
+        difficulty: 'medium',
+        points: 50,
+        estimated_time: 30,
+        proof_type: 'screenshot',
+        proof_hint: '',
+      })
+      setAddingChallengeToGameId(null)
+      // Refresh challenges
+      const challenges = await gamesApi.getChallenges(gameId)
+      setGameChallenges(prev => ({ ...prev, [gameId]: challenges }))
+      await loadData()
+    } catch (err: unknown) {
+      const error = err as { response?: { data?: { detail?: string } } }
+      toast.error(error.response?.data?.detail || 'Не удалось добавить задание')
+    } finally {
+      setIsCreatingChallenge(false)
+    }
+  }
+
   const handleDeleteChallenge = async (challengeId: number, gameId: number) => {
-    if (!confirm('Удалить это задание?')) return
+    const confirmed = await confirm({
+      title: 'Удалить задание?',
+      message: 'Это действие нельзя отменить.',
+      confirmText: 'Удалить',
+      cancelText: 'Отмена',
+      variant: 'danger',
+    })
+    if (!confirmed) return
 
     try {
       await gamesApi.deleteChallenge(challengeId)
@@ -227,7 +312,16 @@ export function LobbyPage() {
   }
 
   const handleStartMarathon = async () => {
-    if (!id || !confirm('Начать марафон? После этого нельзя будет добавить новые игры.')) return
+    if (!id) return
+
+    const confirmed = await confirm({
+      title: 'Начать марафон?',
+      message: 'После старта нельзя будет добавить новые игры.',
+      confirmText: 'Начать',
+      cancelText: 'Отмена',
+      variant: 'warning',
+    })
+    if (!confirmed) return
 
     setIsStarting(true)
     try {
@@ -235,7 +329,7 @@ export function LobbyPage() {
       navigate(`/marathons/${id}/play`)
     } catch (err: unknown) {
       const error = err as { response?: { data?: { detail?: string } } }
-      alert(error.response?.data?.detail || 'Не удалось запустить марафон')
+      toast.error(error.response?.data?.detail || 'Не удалось запустить марафон')
     } finally {
       setIsStarting(false)
     }
@@ -286,12 +380,12 @@ export function LobbyPage() {
       {/* Game header */}
       <div
         className={`flex items-center justify-between p-4 ${
-          game.challenges_count > 0 ? 'cursor-pointer hover:bg-gray-800/50' : ''
+          (game.status === 'approved') ? 'cursor-pointer hover:bg-gray-800/50' : ''
         }`}
-        onClick={() => game.challenges_count > 0 && handleToggleGameChallenges(game.id)}
+        onClick={() => game.status === 'approved' && handleToggleGameChallenges(game.id)}
       >
         <div className="flex items-center gap-3 flex-1 min-w-0">
-          {game.challenges_count > 0 && (
+          {game.status === 'approved' && (
             <span className="text-gray-400 shrink-0">
               {expandedGameId === game.id ? (
                 <ChevronUp className="w-4 h-4" />
@@ -364,50 +458,178 @@ export function LobbyPage() {
             <div className="flex justify-center py-4">
               <Loader2 className="w-5 h-5 animate-spin text-gray-400" />
             </div>
-          ) : gameChallenges[game.id]?.length > 0 ? (
+          ) : (
-            gameChallenges[game.id].map((challenge) => (
+            <>
-              <div
+              {gameChallenges[game.id]?.length > 0 ? (
-                key={challenge.id}
+                gameChallenges[game.id].map((challenge) => (
-                className="flex items-start justify-between gap-3 p-3 bg-gray-800 rounded-lg"
+                  <div
-              >
+                    key={challenge.id}
-                <div className="flex-1 min-w-0">
+                    className="flex items-start justify-between gap-3 p-3 bg-gray-800 rounded-lg"
-                  <div className="flex items-center gap-2 mb-1">
+                  >
-                    <span className={`text-xs px-2 py-0.5 rounded ${
+                    <div className="flex-1 min-w-0">
-                      challenge.difficulty === 'easy' ? 'bg-green-900/50 text-green-400' :
+                      <div className="flex items-center gap-2 mb-1">
-                      challenge.difficulty === 'medium' ? 'bg-yellow-900/50 text-yellow-400' :
+                        <span className={`text-xs px-2 py-0.5 rounded ${
-                      'bg-red-900/50 text-red-400'
+                          challenge.difficulty === 'easy' ? 'bg-green-900/50 text-green-400' :
-                    }`}>
+                          challenge.difficulty === 'medium' ? 'bg-yellow-900/50 text-yellow-400' :
-                      {challenge.difficulty === 'easy' ? 'Легко' :
+                          'bg-red-900/50 text-red-400'
-                       challenge.difficulty === 'medium' ? 'Средне' : 'Сложно'}
+                        }`}>
-                    </span>
+                          {challenge.difficulty === 'easy' ? 'Легко' :
-                    <span className="text-xs text-primary-400 font-medium">
+                           challenge.difficulty === 'medium' ? 'Средне' : 'Сложно'}
-                      +{challenge.points}
+                        </span>
-                    </span>
+                        <span className="text-xs text-primary-400 font-medium">
-                    {challenge.is_generated && (
+                          +{challenge.points}
-                      <span className="text-xs text-gray-500">
+                        </span>
-                        <Sparkles className="w-3 h-3 inline" /> ИИ
+                        {challenge.is_generated && (
-                      </span>
+                          <span className="text-xs text-gray-500">
+                            <Sparkles className="w-3 h-3 inline" /> ИИ
+                          </span>
+                        )}
+                      </div>
+                      <h5 className="text-sm font-medium text-white">{challenge.title}</h5>
+                      <p className="text-xs text-gray-400 mt-1">{challenge.description}</p>
+                    </div>
+                    {isOrganizer && (
+                      <Button
+                        variant="ghost"
+                        size="sm"
+                        onClick={() => handleDeleteChallenge(challenge.id, game.id)}
+                        className="text-red-400 hover:text-red-300 shrink-0"
+                      >
+                        <Trash2 className="w-3 h-3" />
+                      </Button>
                     )}
                   </div>
-                  <h5 className="text-sm font-medium text-white">{challenge.title}</h5>
+                ))
-                  <p className="text-xs text-gray-400 mt-1">{challenge.description}</p>
+              ) : (
-                </div>
+                <p className="text-center text-gray-500 py-2 text-sm">
-                {isOrganizer && (
+                  Нет заданий
+                </p>
+              )}
+
+              {/* Add challenge form */}
+              {isOrganizer && game.status === 'approved' && (
+                addingChallengeToGameId === game.id ? (
+                  <div className="mt-4 p-4 bg-gray-800 rounded-lg space-y-3 border border-gray-700">
+                    <h4 className="font-medium text-white text-sm">Новое задание</h4>
+                    <Input
+                      placeholder="Название задания"
+                      value={newChallenge.title}
+                      onChange={(e) => setNewChallenge(prev => ({ ...prev, title: e.target.value }))}
+                    />
+                    <textarea
+                      placeholder="Описание (что нужно сделать)"
+                      value={newChallenge.description}
+                      onChange={(e) => setNewChallenge(prev => ({ ...prev, description: e.target.value }))}
+                      className="w-full px-3 py-2 bg-gray-900 border border-gray-700 rounded-lg text-white text-sm resize-none"
+                      rows={2}
+                    />
+                    <div className="grid grid-cols-2 gap-2">
+                      <div>
+                        <label className="text-xs text-gray-400 mb-1 block">Тип</label>
+                        <select
+                          value={newChallenge.type}
+                          onChange={(e) => setNewChallenge(prev => ({ ...prev, type: e.target.value }))}
+                          className="w-full px-3 py-2 bg-gray-900 border border-gray-700 rounded-lg text-white text-sm"
+                        >
+                          <option value="completion">Прохождение</option>
+                          <option value="no_death">Без смертей</option>
+                          <option value="speedrun">Спидран</option>
+                          <option value="collection">Коллекция</option>
+                          <option value="achievement">Достижение</option>
+                          <option value="challenge_run">Челлендж-ран</option>
+                        </select>
+                      </div>
+                      <div>
+                        <label className="text-xs text-gray-400 mb-1 block">Сложность</label>
+                        <select
+                          value={newChallenge.difficulty}
+                          onChange={(e) => setNewChallenge(prev => ({ ...prev, difficulty: e.target.value }))}
+                          className="w-full px-3 py-2 bg-gray-900 border border-gray-700 rounded-lg text-white text-sm"
+                        >
+                          <option value="easy">Легко (20-40 очков)</option>
+                          <option value="medium">Средне (45-75 очков)</option>
+                          <option value="hard">Сложно (90-150 очков)</option>
+                        </select>
+                      </div>
+                    </div>
+                    <div className="grid grid-cols-2 gap-2">
+                      <div>
+                        <label className="text-xs text-gray-400 mb-1 block">Очки</label>
+                        <Input
+                          type="number"
+                          value={newChallenge.points}
+                          onChange={(e) => setNewChallenge(prev => ({ ...prev, points: parseInt(e.target.value) || 0 }))}
+                          min={1}
+                          max={500}
+                        />
+                      </div>
+                      <div>
+                        <label className="text-xs text-gray-400 mb-1 block">Время (мин)</label>
+                        <Input
+                          type="number"
+                          value={newChallenge.estimated_time}
+                          onChange={(e) => setNewChallenge(prev => ({ ...prev, estimated_time: parseInt(e.target.value) || 0 }))}
+                          min={1}
+                        />
+                      </div>
+                    </div>
+                    <div className="grid grid-cols-2 gap-2">
+                      <div>
+                        <label className="text-xs text-gray-400 mb-1 block">Тип доказательства</label>
+                        <select
+                          value={newChallenge.proof_type}
+                          onChange={(e) => setNewChallenge(prev => ({ ...prev, proof_type: e.target.value }))}
+                          className="w-full px-3 py-2 bg-gray-900 border border-gray-700 rounded-lg text-white text-sm"
+                        >
+                          <option value="screenshot">Скриншот</option>
+                          <option value="video">Видео</option>
+                          <option value="steam">Steam</option>
+                        </select>
+                      </div>
+                      <div>
+                        <label className="text-xs text-gray-400 mb-1 block">Подсказка</label>
+                        <Input
+                          placeholder="Что должно быть на пруфе"
+                          value={newChallenge.proof_hint}
+                          onChange={(e) => setNewChallenge(prev => ({ ...prev, proof_hint: e.target.value }))}
+                        />
+                      </div>
+                    </div>
+                    <div className="flex gap-2">
+                      <Button
+                        size="sm"
+                        onClick={() => handleCreateChallenge(game.id)}
+                        isLoading={isCreatingChallenge}
+                        disabled={!newChallenge.title || !newChallenge.description}
+                      >
+                        <Plus className="w-4 h-4 mr-1" />
+                        Добавить
+                      </Button>
+                      <Button
+                        variant="ghost"
+                        size="sm"
+                        onClick={() => setAddingChallengeToGameId(null)}
+                      >
+                        Отмена
+                      </Button>
+                    </div>
+                  </div>
+                ) : (
                   <Button
                     variant="ghost"
                     size="sm"
-                    onClick={() => handleDeleteChallenge(challenge.id, game.id)}
+                    onClick={() => {
-                    className="text-red-400 hover:text-red-300 shrink-0"
+                      setAddingChallengeToGameId(game.id)
+                      setExpandedGameId(game.id)
+                    }}
+                    className="w-full mt-2 border border-dashed border-gray-700 text-gray-400 hover:text-white hover:border-gray-600"
                   >
-                    <Trash2 className="w-3 h-3" />
+                    <Plus className="w-4 h-4 mr-1" />
+                    Добавить задание вручную
                   </Button>
-                )}
+                )
-              </div>
+              )}
-            ))
+            </>
-          ) : (
-            <p className="text-center text-gray-500 py-2 text-sm">
-              Нет заданий
-            </p>
           )}
         </div>
       )}

frontend/src/pages/MarathonPage.tsx

@@ -1,18 +1,23 @@
-import { useState, useEffect } from 'react'
+import { useState, useEffect, useRef } from 'react'
 import { useParams, useNavigate, Link } from 'react-router-dom'
 import { marathonsApi, eventsApi, challengesApi } from '@/api'
 import type { Marathon, ActiveEvent, Challenge } from '@/types'
 import { Button, Card, CardContent } from '@/components/ui'
 import { useAuthStore } from '@/store/auth'
+import { useToast } from '@/store/toast'
+import { useConfirm } from '@/store/confirm'
 import { EventBanner } from '@/components/EventBanner'
 import { EventControl } from '@/components/EventControl'
-import { Users, Calendar, Trophy, Play, Settings, Copy, Check, Loader2, Trash2, Globe, Lock, CalendarCheck, UserPlus, Gamepad2, ArrowLeft, Zap } from 'lucide-react'
+import { ActivityFeed, type ActivityFeedRef } from '@/components/ActivityFeed'
+import { Users, Calendar, Trophy, Play, Settings, Copy, Check, Loader2, Trash2, Globe, Lock, CalendarCheck, UserPlus, Gamepad2, ArrowLeft, Zap, Flag } from 'lucide-react'
 import { format } from 'date-fns'
 
 export function MarathonPage() {
   const { id } = useParams<{ id: string }>()
   const navigate = useNavigate()
   const user = useAuthStore((state) => state.user)
+  const toast = useToast()
+  const confirm = useConfirm()
   const [marathon, setMarathon] = useState<Marathon | null>(null)
   const [activeEvent, setActiveEvent] = useState<ActiveEvent | null>(null)
   const [challenges, setChallenges] = useState<Challenge[]>([])
@@ -20,7 +25,9 @@ export function MarathonPage() {
   const [copied, setCopied] = useState(false)
   const [isDeleting, setIsDeleting] = useState(false)
   const [isJoining, setIsJoining] = useState(false)
+  const [isFinishing, setIsFinishing] = useState(false)
   const [showEventControl, setShowEventControl] = useState(false)
+  const activityFeedRef = useRef<ActivityFeedRef>(null)
 
   useEffect(() => {
     loadMarathon()
@@ -60,6 +67,8 @@ export function MarathonPage() {
     try {
       const eventData = await eventsApi.getActive(parseInt(id))
       setActiveEvent(eventData)
+      // Refresh activity feed when event changes
+      activityFeedRef.current?.refresh()
     } catch (error) {
       console.error('Failed to refresh event:', error)
     }
@@ -79,7 +88,16 @@ export function MarathonPage() {
   }
 
   const handleDelete = async () => {
-    if (!marathon || !confirm('Вы уверены, что хотите удалить этот марафон? Это действие нельзя отменить.')) return
+    if (!marathon) return
+
+    const confirmed = await confirm({
+      title: 'Удалить марафон?',
+      message: 'Все данные марафона будут удалены безвозвратно.',
+      confirmText: 'Удалить',
+      cancelText: 'Отмена',
+      variant: 'danger',
+    })
+    if (!confirmed) return
 
     setIsDeleting(true)
     try {
@@ -87,7 +105,7 @@ export function MarathonPage() {
       navigate('/marathons')
     } catch (error) {
       console.error('Failed to delete marathon:', error)
-      alert('Не удалось удалить марафон')
+      toast.error('Не удалось удалить марафон')
     } finally {
       setIsDeleting(false)
     }
@@ -102,12 +120,37 @@ export function MarathonPage() {
       setMarathon(updated)
     } catch (err: unknown) {
       const error = err as { response?: { data?: { detail?: string } } }
-      alert(error.response?.data?.detail || 'Не удалось присоединиться')
+      toast.error(error.response?.data?.detail || 'Не удалось присоединиться')
     } finally {
       setIsJoining(false)
     }
   }
 
+  const handleFinish = async () => {
+    if (!marathon) return
+
+    const confirmed = await confirm({
+      title: 'Завершить марафон?',
+      message: 'Марафон будет завершён досрочно. Участники больше не смогут выполнять задания.',
+      confirmText: 'Завершить',
+      cancelText: 'Отмена',
+      variant: 'warning',
+    })
+    if (!confirmed) return
+
+    setIsFinishing(true)
+    try {
+      const updated = await marathonsApi.finish(marathon.id)
+      setMarathon(updated)
+      toast.success('Марафон завершён')
+    } catch (err: unknown) {
+      const error = err as { response?: { data?: { detail?: string } } }
+      toast.error(error.response?.data?.detail || 'Не удалось завершить марафон')
+    } finally {
+      setIsFinishing(false)
+    }
+  }
+
   if (isLoading || !marathon) {
     return (
       <div className="flex justify-center py-12">
@@ -122,243 +165,273 @@ export function MarathonPage() {
   const canDelete = isCreator || user?.role === 'admin'
 
   return (
-    <div className="max-w-4xl mx-auto">
+    <div className="max-w-7xl mx-auto">
       {/* Back button */}
       <Link to="/marathons" className="inline-flex items-center gap-2 text-gray-400 hover:text-white mb-4 transition-colors">
         <ArrowLeft className="w-4 h-4" />
         К списку марафонов
       </Link>
 
-      {/* Header */}
+      <div className="flex flex-col lg:flex-row gap-6">
-      <div className="flex justify-between items-start mb-8">
+        {/* Main content */}
-        <div>
+        <div className="flex-1 min-w-0">
-          <div className="flex items-center gap-3 mb-2">
+          {/* Header */}
-            <h1 className="text-3xl font-bold text-white">{marathon.title}</h1>
+          <div className="flex justify-between items-start mb-8">
-            <span className={`flex items-center gap-1 text-xs px-2 py-1 rounded ${
+            <div>
-              marathon.is_public
+              <div className="flex items-center gap-3 mb-2">
-                ? 'bg-green-900/50 text-green-400'
+                <h1 className="text-3xl font-bold text-white">{marathon.title}</h1>
-                : 'bg-gray-700 text-gray-300'
+                <span className={`flex items-center gap-1 text-xs px-2 py-1 rounded ${
-            }`}>
+                  marathon.is_public
-              {marathon.is_public ? (
+                    ? 'bg-green-900/50 text-green-400'
-                <><Globe className="w-3 h-3" /> Открытый</>
+                    : 'bg-gray-700 text-gray-300'
-              ) : (
+                }`}>
-                <><Lock className="w-3 h-3" /> Закрытый</>
+                  {marathon.is_public ? (
+                    <><Globe className="w-3 h-3" /> Открытый</>
+                  ) : (
+                    <><Lock className="w-3 h-3" /> Закрытый</>
+                  )}
+                </span>
+              </div>
+              {marathon.description && (
+                <p className="text-gray-400">{marathon.description}</p>
               )}
-            </span>
+            </div>
+
+            <div className="flex gap-2 flex-wrap justify-end">
+              {/* Кнопка присоединиться для открытых марафонов */}
+              {marathon.is_public && !isParticipant && marathon.status !== 'finished' && (
+                <Button onClick={handleJoinPublic} isLoading={isJoining}>
+                  <UserPlus className="w-4 h-4 mr-2" />
+                  Присоединиться
+                </Button>
+              )}
+
+              {/* Настройка для организаторов */}
+              {marathon.status === 'preparing' && isOrganizer && (
+                <Link to={`/marathons/${id}/lobby`}>
+                  <Button variant="secondary">
+                    <Settings className="w-4 h-4 mr-2" />
+                    Настройка
+                  </Button>
+                </Link>
+              )}
+
+              {/* Предложить игру для участников (не организаторов) если разрешено */}
+              {marathon.status === 'preparing' && isParticipant && !isOrganizer && marathon.game_proposal_mode === 'all_participants' && (
+                <Link to={`/marathons/${id}/lobby`}>
+                  <Button variant="secondary">
+                    <Gamepad2 className="w-4 h-4 mr-2" />
+                    Предложить игру
+                  </Button>
+                </Link>
+              )}
+
+              {marathon.status === 'active' && isParticipant && (
+                <Link to={`/marathons/${id}/play`}>
+                  <Button>
+                    <Play className="w-4 h-4 mr-2" />
+                    Играть
+                  </Button>
+                </Link>
+              )}
+
+              <Link to={`/marathons/${id}/leaderboard`}>
+                <Button variant="secondary">
+                  <Trophy className="w-4 h-4 mr-2" />
+                  Рейтинг
+                </Button>
+              </Link>
+
+              {marathon.status === 'active' && isOrganizer && (
+                <Button
+                  variant="secondary"
+                  onClick={handleFinish}
+                  isLoading={isFinishing}
+                  className="text-yellow-400 hover:text-yellow-300 hover:bg-yellow-900/20"
+                >
+                  <Flag className="w-4 h-4 mr-2" />
+                  Завершить
+                </Button>
+              )}
+
+              {canDelete && (
+                <Button
+                  variant="ghost"
+                  onClick={handleDelete}
+                  isLoading={isDeleting}
+                  className="text-red-400 hover:text-red-300 hover:bg-red-900/20"
+                >
+                  <Trash2 className="w-4 h-4" />
+                </Button>
+              )}
+            </div>
           </div>
-          {marathon.description && (
-            <p className="text-gray-400">{marathon.description}</p>
-          )}
-        </div>
 
-        <div className="flex gap-2">
+          {/* Stats */}
-          {/* Кнопка присоединиться для открытых марафонов */}
+          <div className="grid grid-cols-2 md:grid-cols-5 gap-4 mb-8">
-          {marathon.is_public && !isParticipant && marathon.status !== 'finished' && (
+            <Card>
-            <Button onClick={handleJoinPublic} isLoading={isJoining}>
+              <CardContent className="text-center py-4">
-              <UserPlus className="w-4 h-4 mr-2" />
+                <div className="text-2xl font-bold text-white">{marathon.participants_count}</div>
-              Присоединиться
+                <div className="text-sm text-gray-400 flex items-center justify-center gap-1">
-            </Button>
+                  <Users className="w-4 h-4" />
+                  Участников
+                </div>
+              </CardContent>
+            </Card>
+
+            <Card>
+              <CardContent className="text-center py-4">
+                <div className="text-2xl font-bold text-white">{marathon.games_count}</div>
+                <div className="text-sm text-gray-400">Игр</div>
+              </CardContent>
+            </Card>
+
+            <Card>
+              <CardContent className="text-center py-4">
+                <div className="text-2xl font-bold text-white">
+                  {marathon.start_date ? format(new Date(marathon.start_date), 'd MMM') : '-'}
+                </div>
+                <div className="text-sm text-gray-400 flex items-center justify-center gap-1">
+                  <Calendar className="w-4 h-4" />
+                  Начало
+                </div>
+              </CardContent>
+            </Card>
+
+            <Card>
+              <CardContent className="text-center py-4">
+                <div className="text-2xl font-bold text-white">
+                  {marathon.end_date ? format(new Date(marathon.end_date), 'd MMM') : '-'}
+                </div>
+                <div className="text-sm text-gray-400 flex items-center justify-center gap-1">
+                  <CalendarCheck className="w-4 h-4" />
+                  Конец
+                </div>
+              </CardContent>
+            </Card>
+
+            <Card>
+              <CardContent className="text-center py-4">
+                <div className={`text-2xl font-bold ${
+                  marathon.status === 'active' ? 'text-green-500' :
+                  marathon.status === 'preparing' ? 'text-yellow-500' : 'text-gray-400'
+                }`}>
+                  {marathon.status === 'active' ? 'Активен' : marathon.status === 'preparing' ? 'Подготовка' : 'Завершён'}
+                </div>
+                <div className="text-sm text-gray-400">Статус</div>
+              </CardContent>
+            </Card>
+          </div>
+
+          {/* Active event banner */}
+          {marathon.status === 'active' && activeEvent?.event && (
+            <div className="mb-8">
+              <EventBanner activeEvent={activeEvent} onRefresh={refreshEvent} />
+            </div>
           )}
 
-          {/* Настройка для организаторов */}
+          {/* Event control for organizers */}
-          {marathon.status === 'preparing' && isOrganizer && (
+          {marathon.status === 'active' && isOrganizer && (
-            <Link to={`/marathons/${id}/lobby`}>
+            <Card className="mb-8">
-              <Button variant="secondary">
+              <CardContent>
-                <Settings className="w-4 h-4 mr-2" />
+                <div className="flex items-center justify-between mb-4">
-                Настройка
+                  <h3 className="font-medium text-white flex items-center gap-2">
-              </Button>
+                    <Zap className="w-5 h-5 text-yellow-500" />
-            </Link>
+                    Управление событиями
-          )}
+                  </h3>
-
+                  <Button
-          {/* Предложить игру для участников (не организаторов) если разрешено */}
+                    variant="ghost"
-          {marathon.status === 'preparing' && isParticipant && !isOrganizer && marathon.game_proposal_mode === 'all_participants' && (
+                    size="sm"
-            <Link to={`/marathons/${id}/lobby`}>
+                    onClick={() => setShowEventControl(!showEventControl)}
-              <Button variant="secondary">
+                  >
-                <Gamepad2 className="w-4 h-4 mr-2" />
+                    {showEventControl ? 'Скрыть' : 'Показать'}
-                Предложить игру
+                  </Button>
-              </Button>
+                </div>
-            </Link>
+                {showEventControl && activeEvent && (
-          )}
+                  <EventControl
-
+                    marathonId={marathon.id}
-          {marathon.status === 'active' && isParticipant && (
+                    activeEvent={activeEvent}
-            <Link to={`/marathons/${id}/play`}>
+                    challenges={challenges}
-              <Button>
+                    onEventChange={refreshEvent}
-                <Play className="w-4 h-4 mr-2" />
+                  />
-                Играть
-              </Button>
-            </Link>
-          )}
-
-          <Link to={`/marathons/${id}/leaderboard`}>
-            <Button variant="secondary">
-              <Trophy className="w-4 h-4 mr-2" />
-              Рейтинг
-            </Button>
-          </Link>
-
-          {canDelete && (
-            <Button
-              variant="ghost"
-              onClick={handleDelete}
-              isLoading={isDeleting}
-              className="text-red-400 hover:text-red-300 hover:bg-red-900/20"
-            >
-              <Trash2 className="w-4 h-4" />
-            </Button>
-          )}
-        </div>
-      </div>
-
-      {/* Stats */}
-      <div className="grid md:grid-cols-5 gap-4 mb-8">
-        <Card>
-          <CardContent className="text-center py-4">
-            <div className="text-2xl font-bold text-white">{marathon.participants_count}</div>
-            <div className="text-sm text-gray-400 flex items-center justify-center gap-1">
-              <Users className="w-4 h-4" />
-              Участников
-            </div>
-          </CardContent>
-        </Card>
-
-        <Card>
-          <CardContent className="text-center py-4">
-            <div className="text-2xl font-bold text-white">{marathon.games_count}</div>
-            <div className="text-sm text-gray-400">Игр</div>
-          </CardContent>
-        </Card>
-
-        <Card>
-          <CardContent className="text-center py-4">
-            <div className="text-2xl font-bold text-white">
-              {marathon.start_date ? format(new Date(marathon.start_date), 'd MMM') : '-'}
-            </div>
-            <div className="text-sm text-gray-400 flex items-center justify-center gap-1">
-              <Calendar className="w-4 h-4" />
-              Начало
-            </div>
-          </CardContent>
-        </Card>
-
-        <Card>
-          <CardContent className="text-center py-4">
-            <div className="text-2xl font-bold text-white">
-              {marathon.end_date ? format(new Date(marathon.end_date), 'd MMM') : '-'}
-            </div>
-            <div className="text-sm text-gray-400 flex items-center justify-center gap-1">
-              <CalendarCheck className="w-4 h-4" />
-              Конец
-            </div>
-          </CardContent>
-        </Card>
-
-        <Card>
-          <CardContent className="text-center py-4">
-            <div className={`text-2xl font-bold ${
-              marathon.status === 'active' ? 'text-green-500' :
-              marathon.status === 'preparing' ? 'text-yellow-500' : 'text-gray-400'
-            }`}>
-              {marathon.status === 'active' ? 'Активен' : marathon.status === 'preparing' ? 'Подготовка' : 'Завершён'}
-            </div>
-            <div className="text-sm text-gray-400">Статус</div>
-          </CardContent>
-        </Card>
-      </div>
-
-      {/* Active event banner */}
-      {marathon.status === 'active' && activeEvent?.event && (
-        <div className="mb-8">
-          <EventBanner activeEvent={activeEvent} onRefresh={refreshEvent} />
-        </div>
-      )}
-
-      {/* Event control for organizers */}
-      {marathon.status === 'active' && isOrganizer && (
-        <Card className="mb-8">
-          <CardContent>
-            <div className="flex items-center justify-between mb-4">
-              <h3 className="font-medium text-white flex items-center gap-2">
-                <Zap className="w-5 h-5 text-yellow-500" />
-                Управление событиями
-              </h3>
-              <Button
-                variant="ghost"
-                size="sm"
-                onClick={() => setShowEventControl(!showEventControl)}
-              >
-                {showEventControl ? 'Скрыть' : 'Показать'}
-              </Button>
-            </div>
-            {showEventControl && activeEvent && (
-              <EventControl
-                marathonId={marathon.id}
-                activeEvent={activeEvent}
-                challenges={challenges}
-                onEventChange={refreshEvent}
-              />
-            )}
-          </CardContent>
-        </Card>
-      )}
-
-      {/* Invite link */}
-      {marathon.status !== 'finished' && (
-        <Card className="mb-8">
-          <CardContent>
-            <h3 className="font-medium text-white mb-3">Ссылка для приглашения</h3>
-            <div className="flex items-center gap-3">
-              <code className="flex-1 px-4 py-2 bg-gray-900 rounded-lg text-primary-400 font-mono text-sm overflow-hidden text-ellipsis">
-                {getInviteLink()}
-              </code>
-              <Button variant="secondary" onClick={copyInviteLink}>
-                {copied ? (
-                  <>
-                    <Check className="w-4 h-4 mr-2" />
-                    Скопировано!
-                  </>
-                ) : (
-                  <>
-                    <Copy className="w-4 h-4 mr-2" />
-                    Копировать
-                  </>
                 )}
-              </Button>
+              </CardContent>
-            </div>
+            </Card>
-            <p className="text-sm text-gray-500 mt-2">
+          )}
-              Поделитесь этой ссылкой с друзьями, чтобы они могли присоединиться к марафону
-            </p>
-          </CardContent>
-        </Card>
-      )}
 
-      {/* My stats */}
+          {/* Invite link */}
-      {marathon.my_participation && (
+          {marathon.status !== 'finished' && (
-        <Card>
+            <Card className="mb-8">
-          <CardContent>
+              <CardContent>
-            <h3 className="font-medium text-white mb-4">Ваша статистика</h3>
+                <h3 className="font-medium text-white mb-3">Ссылка для приглашения</h3>
-            <div className="grid grid-cols-3 gap-4 text-center">
+                <div className="flex items-center gap-3">
-              <div>
+                  <code className="flex-1 px-4 py-2 bg-gray-900 rounded-lg text-primary-400 font-mono text-sm overflow-hidden text-ellipsis">
-                <div className="text-2xl font-bold text-primary-500">
+                    {getInviteLink()}
-                  {marathon.my_participation.total_points}
+                  </code>
+                  <Button variant="secondary" onClick={copyInviteLink}>
+                    {copied ? (
+                      <>
+                        <Check className="w-4 h-4 mr-2" />
+                        Скопировано!
+                      </>
+                    ) : (
+                      <>
+                        <Copy className="w-4 h-4 mr-2" />
+                        Копировать
+                      </>
+                    )}
+                  </Button>
                 </div>
-                <div className="text-sm text-gray-400">Очков</div>
+                <p className="text-sm text-gray-500 mt-2">
-              </div>
+                  Поделитесь этой ссылкой с друзьями, чтобы они могли присоединиться к марафону
-              <div>
+                </p>
-                <div className="text-2xl font-bold text-yellow-500">
+              </CardContent>
-                  {marathon.my_participation.current_streak}
+            </Card>
+          )}
+
+          {/* My stats */}
+          {marathon.my_participation && (
+            <Card>
+              <CardContent>
+                <h3 className="font-medium text-white mb-4">Ваша статистика</h3>
+                <div className="grid grid-cols-3 gap-4 text-center">
+                  <div>
+                    <div className="text-2xl font-bold text-primary-500">
+                      {marathon.my_participation.total_points}
+                    </div>
+                    <div className="text-sm text-gray-400">Очков</div>
+                  </div>
+                  <div>
+                    <div className="text-2xl font-bold text-yellow-500">
+                      {marathon.my_participation.current_streak}
+                    </div>
+                    <div className="text-sm text-gray-400">Серия</div>
+                  </div>
+                  <div>
+                    <div className="text-2xl font-bold text-gray-400">
+                      {marathon.my_participation.drop_count}
+                    </div>
+                    <div className="text-sm text-gray-400">Пропусков</div>
+                  </div>
                 </div>
-                <div className="text-sm text-gray-400">Серия</div>
+              </CardContent>
-              </div>
+            </Card>
-              <div>
+          )}
-                <div className="text-2xl font-bold text-gray-400">
+        </div>
-                  {marathon.my_participation.drop_count}
+
-                </div>
+        {/* Activity Feed - right sidebar */}
-                <div className="text-sm text-gray-400">Пропусков</div>
+        {isParticipant && (
-              </div>
+          <div className="lg:w-96 flex-shrink-0">
+            <div className="lg:sticky lg:top-4">
+              <ActivityFeed
+                ref={activityFeedRef}
+                marathonId={marathon.id}
+                className="lg:max-h-[calc(100vh-8rem)]"
+              />
             </div>
-          </CardContent>
+          </div>
-        </Card>
+        )}
-      )}
+      </div>
     </div>
   )
 }

frontend/src/store/auth.ts

@@ -17,6 +17,7 @@ interface AuthState {
   clearError: () => void
   setPendingInviteCode: (code: string | null) => void
   consumePendingInviteCode: () => string | null
+  updateUser: (updates: Partial<User>) => void
 }
 
 export const useAuthStore = create<AuthState>()(
@@ -89,6 +90,13 @@ export const useAuthStore = create<AuthState>()(
         set({ pendingInviteCode: null })
         return code
       },
+
+      updateUser: (updates) => {
+        const currentUser = get().user
+        if (currentUser) {
+          set({ user: { ...currentUser, ...updates } })
+        }
+      },
     }),
     {
       name: 'auth-storage',

frontend/src/store/confirm.ts

@@ -0,0 +1,55 @@
+import { create } from 'zustand'
+
+export type ConfirmVariant = 'danger' | 'warning' | 'info'
+
+interface ConfirmOptions {
+  title: string
+  message: string
+  confirmText?: string
+  cancelText?: string
+  variant?: ConfirmVariant
+}
+
+interface ConfirmState {
+  isOpen: boolean
+  options: ConfirmOptions | null
+  resolve: ((value: boolean) => void) | null
+
+  confirm: (options: ConfirmOptions) => Promise<boolean>
+  handleConfirm: () => void
+  handleCancel: () => void
+}
+
+export const useConfirmStore = create<ConfirmState>((set, get) => ({
+  isOpen: false,
+  options: null,
+  resolve: null,
+
+  confirm: (options) => {
+    return new Promise<boolean>((resolve) => {
+      set({
+        isOpen: true,
+        options,
+        resolve,
+      })
+    })
+  },
+
+  handleConfirm: () => {
+    const { resolve } = get()
+    if (resolve) resolve(true)
+    set({ isOpen: false, options: null, resolve: null })
+  },
+
+  handleCancel: () => {
+    const { resolve } = get()
+    if (resolve) resolve(false)
+    set({ isOpen: false, options: null, resolve: null })
+  },
+}))
+
+// Convenient hook
+export const useConfirm = () => {
+  const confirm = useConfirmStore((state) => state.confirm)
+  return confirm
+}

frontend/src/store/toast.ts

@@ -0,0 +1,53 @@
+import { create } from 'zustand'
+
+export type ToastType = 'success' | 'error' | 'info' | 'warning'
+
+export interface Toast {
+  id: string
+  type: ToastType
+  message: string
+  duration?: number
+}
+
+interface ToastState {
+  toasts: Toast[]
+  addToast: (type: ToastType, message: string, duration?: number) => void
+  removeToast: (id: string) => void
+}
+
+export const useToastStore = create<ToastState>((set) => ({
+  toasts: [],
+
+  addToast: (type, message, duration = 4000) => {
+    const id = `${Date.now()}-${Math.random().toString(36).slice(2)}`
+    set((state) => ({
+      toasts: [...state.toasts, { id, type, message, duration }],
+    }))
+
+    if (duration > 0) {
+      setTimeout(() => {
+        set((state) => ({
+          toasts: state.toasts.filter((t) => t.id !== id),
+        }))
+      }, duration)
+    }
+  },
+
+  removeToast: (id) => {
+    set((state) => ({
+      toasts: state.toasts.filter((t) => t.id !== id),
+    }))
+  },
+}))
+
+// Helper hooks for convenience
+export const useToast = () => {
+  const addToast = useToastStore((state) => state.addToast)
+
+  return {
+    success: (message: string, duration?: number) => addToast('success', message, duration),
+    error: (message: string, duration?: number) => addToast('error', message, duration),
+    info: (message: string, duration?: number) => addToast('info', message, duration),
+    warning: (message: string, duration?: number) => addToast('warning', message, duration),
+  }
+}

frontend/src/types/index.ts

@@ -7,6 +7,11 @@ export interface User {
   nickname: string
   avatar_url: string | null
   role: UserRole
+  telegram_id: number | null
+  telegram_username: string | null
+  telegram_first_name: string | null
+  telegram_last_name: string | null
+  telegram_avatar_url: string | null
   created_at: string
 }
 
@@ -158,7 +163,7 @@ export interface ChallengesPreviewResponse {
 }
 
 // Assignment types
-export type AssignmentStatus = 'active' | 'completed' | 'dropped'
+export type AssignmentStatus = 'active' | 'completed' | 'dropped' | 'returned'
 
 export interface Assignment {
   id: number
@@ -170,6 +175,7 @@ export interface Assignment {
   streak_at_completion: number | null
   started_at: string
   completed_at: string | null
+  drop_penalty: number
 }
 
 export interface SpinResult {
@@ -245,6 +251,14 @@ export interface CommonEnemyLeaderboardEntry {
   bonus_points: number
 }
 
+// Event Assignment (Common Enemy)
+export interface EventAssignment {
+  assignment: Assignment | null
+  event_id: number | null
+  challenge_id: number | null
+  is_completed: boolean
+}
+
 // Activity types
 export type ActivityType =
   | 'join'
@@ -256,6 +270,10 @@ export type ActivityType =
   | 'add_game'
   | 'approve_game'
   | 'reject_game'
+  | 'event_start'
+  | 'event_end'
+  | 'swap'
+  | 'rematch'
 
 export interface Activity {
   id: number
@@ -278,7 +296,7 @@ export type EventType =
   | 'double_risk'
   | 'jackpot'
   | 'swap'
-  | 'rematch'
+  | 'game_choice'
 
 export interface MarathonEvent {
   id: number
@@ -322,7 +340,7 @@ export const EVENT_INFO: Record<EventType, { name: string; description: string;
     color: 'red',
   },
   double_risk: {
-    name: 'Двойной риск',
+    name: 'Безопасная игра',
     description: 'Дропы бесплатны, но очки x0.5',
     color: 'purple',
   },
@@ -336,13 +354,31 @@ export const EVENT_INFO: Record<EventType, { name: string; description: string;
     description: 'Можно поменяться заданием с другим участником',
     color: 'blue',
   },
-  rematch: {
+  game_choice: {
-    name: 'Реванш',
+    name: 'Выбор игры',
-    description: 'Можно переделать проваленный челлендж за 50% очков',
+    description: 'Выбери игру и один из 3 челленджей. Можно заменить задание без штрафа!',
     color: 'orange',
   },
 }
 
+// Game Choice types
+export interface GameChoiceChallenge {
+  id: number
+  title: string
+  description: string
+  difficulty: Difficulty
+  points: number
+  estimated_time: number | null
+  proof_type: ProofType
+  proof_hint: string | null
+}
+
+export interface GameChoiceChallenges {
+  game_id: number
+  game_title: string
+  challenges: GameChoiceChallenge[]
+}
+
 // Admin types
 export interface AdminUser {
   id: number
@@ -374,3 +410,57 @@ export interface PlatformStats {
   games_count: number
   total_participations: number
 }
+
+// Dispute types
+export type DisputeStatus = 'open' | 'valid' | 'invalid'
+
+export interface DisputeComment {
+  id: number
+  user: User
+  text: string
+  created_at: string
+}
+
+export interface DisputeVote {
+  user: User
+  vote: boolean // true = valid, false = invalid
+  created_at: string
+}
+
+export interface Dispute {
+  id: number
+  raised_by: User
+  reason: string
+  status: DisputeStatus
+  comments: DisputeComment[]
+  votes: DisputeVote[]
+  votes_valid: number
+  votes_invalid: number
+  my_vote: boolean | null
+  expires_at: string
+  created_at: string
+  resolved_at: string | null
+}
+
+export interface AssignmentDetail {
+  id: number
+  challenge: Challenge
+  participant: User
+  status: AssignmentStatus
+  proof_url: string | null
+  proof_image_url: string | null
+  proof_comment: string | null
+  points_earned: number
+  streak_at_completion: number | null
+  started_at: string
+  completed_at: string | null
+  can_dispute: boolean
+  dispute: Dispute | null
+}
+
+export interface ReturnedAssignment {
+  id: number
+  challenge: Challenge
+  original_completed_at: string
+  dispute_reason: string
+}

frontend/src/utils/activity.ts

@@ -0,0 +1,250 @@
+import type { Activity, ActivityType, EventType } from '@/types'
+import {
+  UserPlus,
+  RotateCcw,
+  CheckCircle,
+  XCircle,
+  Play,
+  Flag,
+  Plus,
+  ThumbsUp,
+  ThumbsDown,
+  Zap,
+  ZapOff,
+  ArrowLeftRight,
+  RefreshCw,
+  type LucideIcon,
+} from 'lucide-react'
+
+// Relative time formatting
+export function formatRelativeTime(dateStr: string): string {
+  // Backend saves time in UTC, ensure we parse it correctly
+  // If the string doesn't end with 'Z', append it to indicate UTC
+  const utcDateStr = dateStr.endsWith('Z') ? dateStr : dateStr + 'Z'
+  const date = new Date(utcDateStr)
+  const now = new Date()
+  const diffMs = now.getTime() - date.getTime()
+  const diffSec = Math.floor(diffMs / 1000)
+  const diffMin = Math.floor(diffSec / 60)
+  const diffHour = Math.floor(diffMin / 60)
+  const diffDay = Math.floor(diffHour / 24)
+
+  if (diffSec < 60) return 'только что'
+  if (diffMin < 60) {
+    if (diffMin === 1) return '1 мин назад'
+    if (diffMin < 5) return `${diffMin} мин назад`
+    if (diffMin < 21 && diffMin > 4) return `${diffMin} мин назад`
+    return `${diffMin} мин назад`
+  }
+  if (diffHour < 24) {
+    if (diffHour === 1) return '1 час назад'
+    if (diffHour < 5) return `${diffHour} часа назад`
+    return `${diffHour} часов назад`
+  }
+  if (diffDay === 1) return 'вчера'
+  if (diffDay < 7) return `${diffDay} дн назад`
+
+  return date.toLocaleDateString('ru-RU', { day: 'numeric', month: 'short' })
+}
+
+// Activity icon mapping
+export function getActivityIcon(type: ActivityType): LucideIcon {
+  const icons: Record<ActivityType, LucideIcon> = {
+    join: UserPlus,
+    spin: RotateCcw,
+    complete: CheckCircle,
+    drop: XCircle,
+    start_marathon: Play,
+    finish_marathon: Flag,
+    add_game: Plus,
+    approve_game: ThumbsUp,
+    reject_game: ThumbsDown,
+    event_start: Zap,
+    event_end: ZapOff,
+    swap: ArrowLeftRight,
+    rematch: RefreshCw,
+  }
+  return icons[type] || Zap
+}
+
+// Activity color mapping
+export function getActivityColor(type: ActivityType): string {
+  const colors: Record<ActivityType, string> = {
+    join: 'text-green-400',
+    spin: 'text-blue-400',
+    complete: 'text-green-400',
+    drop: 'text-red-400',
+    start_marathon: 'text-green-400',
+    finish_marathon: 'text-gray-400',
+    add_game: 'text-blue-400',
+    approve_game: 'text-green-400',
+    reject_game: 'text-red-400',
+    event_start: 'text-yellow-400',
+    event_end: 'text-gray-400',
+    swap: 'text-purple-400',
+    rematch: 'text-orange-400',
+  }
+  return colors[type] || 'text-gray-400'
+}
+
+// Activity background for special events
+export function getActivityBgClass(type: ActivityType): string {
+  if (type === 'event_start') {
+    return 'bg-gradient-to-r from-yellow-900/30 to-orange-900/30 border-yellow-700/50'
+  }
+  if (type === 'event_end') {
+    return 'bg-gray-800/50 border-gray-700/50'
+  }
+  return 'bg-gray-800/30 border-gray-700/30'
+}
+
+// Check if activity is a special event
+export function isEventActivity(type: ActivityType): boolean {
+  return type === 'event_start' || type === 'event_end'
+}
+
+// Event type to Russian name mapping
+const EVENT_NAMES: Record<EventType, string> = {
+  golden_hour: 'Золотой час',
+  common_enemy: 'Общий враг',
+  double_risk: 'Безопасная игра',
+  jackpot: 'Джекпот',
+  swap: 'Обмен',
+  game_choice: 'Выбор игры',
+}
+
+// Difficulty translation
+const DIFFICULTY_NAMES: Record<string, string> = {
+  easy: 'Легкий',
+  medium: 'Средний',
+  hard: 'Сложный',
+}
+
+interface Winner {
+  nickname: string
+  rank: number
+  bonus_points: number
+}
+
+// Format activity message
+export function formatActivityMessage(activity: Activity): { title: string; details?: string; extra?: string } {
+  const data = activity.data || {}
+
+  switch (activity.type) {
+    case 'join':
+      return { title: 'присоединился к марафону' }
+
+    case 'spin': {
+      const game = (data.game as string) || ''
+      const challenge = (data.challenge as string) || ''
+      const difficulty = data.difficulty ? DIFFICULTY_NAMES[data.difficulty as string] || '' : ''
+
+      return {
+        title: 'получил задание',
+        details: challenge || undefined,
+        extra: [game, difficulty].filter(Boolean).join(' • ') || undefined,
+      }
+    }
+
+    case 'complete': {
+      const game = (data.game as string) || ''
+      const challenge = (data.challenge as string) || ''
+      const points = data.points ? `+${data.points}` : ''
+      const streak = data.streak && (data.streak as number) > 1 ? `серия ${data.streak}` : ''
+      const bonus = data.common_enemy_bonus ? `+${data.common_enemy_bonus} бонус` : ''
+
+      return {
+        title: `завершил ${points}`,
+        details: challenge || undefined,
+        extra: [game, streak, bonus].filter(Boolean).join(' • ') || undefined,
+      }
+    }
+
+    case 'drop': {
+      const game = (data.game as string) || ''
+      const challenge = (data.challenge as string) || ''
+      const penalty = data.penalty ? `-${data.penalty}` : ''
+      const free = data.free_drop ? '(бесплатно)' : ''
+
+      return {
+        title: `пропустил ${penalty} ${free}`.trim(),
+        details: challenge || undefined,
+        extra: game || undefined,
+      }
+    }
+
+    case 'start_marathon':
+      return { title: 'Марафон начался!' }
+
+    case 'finish_marathon':
+      return { title: 'Марафон завершён!' }
+
+    case 'add_game':
+      return {
+        title: 'добавил игру',
+        details: (data.game as string) || (data.game_title as string) || undefined,
+      }
+
+    case 'approve_game':
+      return {
+        title: 'одобрил игру',
+        details: (data.game as string) || (data.game_title as string) || undefined,
+      }
+
+    case 'reject_game':
+      return {
+        title: 'отклонил игру',
+        details: (data.game as string) || (data.game_title as string) || undefined,
+      }
+
+    case 'event_start': {
+      const eventName = EVENT_NAMES[data.event_type as EventType] || (data.event_name as string) || 'Событие'
+      return {
+        title: 'СОБЫТИЕ НАЧАЛОСЬ',
+        details: eventName,
+      }
+    }
+
+    case 'event_end': {
+      const eventName = EVENT_NAMES[data.event_type as EventType] || (data.event_name as string) || 'Событие'
+      const winners = data.winners as Winner[] | undefined
+
+      let winnersText = ''
+      if (winners && winners.length > 0) {
+        const medals = ['🥇', '🥈', '🥉']
+        winnersText = winners
+          .map((w) => `${medals[w.rank - 1] || ''} ${w.nickname} +${w.bonus_points}`)
+          .join(' ')
+      }
+
+      return {
+        title: 'Событие завершено',
+        details: eventName,
+        extra: winnersText || undefined,
+      }
+    }
+
+    case 'swap': {
+      const challenge = (data.challenge as string) || ''
+      const withUser = (data.with_user as string) || ''
+      return {
+        title: 'обменялся заданиями',
+        details: withUser ? `с ${withUser}` : undefined,
+        extra: challenge || undefined,
+      }
+    }
+
+    case 'rematch': {
+      const game = (data.game as string) || ''
+      const challenge = (data.challenge as string) || ''
+      return {
+        title: 'взял реванш',
+        details: challenge || undefined,
+        extra: game || undefined,
+      }
+    }
+
+    default:
+      return { title: 'выполнил действие' }
+  }
+}