diff --git a/frontend/src/pages/LobbyPage.tsx b/frontend/src/pages/LobbyPage.tsx
index 9f3cd5a..0ede02b 100644
--- a/frontend/src/pages/LobbyPage.tsx
+++ b/frontend/src/pages/LobbyPage.tsx
@@ -804,6 +804,14 @@ export function LobbyPage() {
                             </select>
                           </div>
                         </div>
+                        <div>
+                          <label className="text-xs text-gray-400 mb-1 block">Подсказка для пруфа</label>
+                          <Input
+                            placeholder="Что именно должно быть на скриншоте/видео"
+                            value={editChallenge.proof_hint}
+                            onChange={(e) => setEditChallenge(prev => ({ ...prev, proof_hint: e.target.value }))}
+                          />
+                        </div>
                         <div className="flex gap-2">
                           <NeonButton
                             size="sm"
@@ -852,6 +860,9 @@ export function LobbyPage() {
                           </div>
                           <h5 className="text-sm font-medium text-white">{challenge.title}</h5>
                           <p className="text-xs text-gray-400 mt-1">{challenge.description}</p>
+                          {challenge.proof_hint && (
+                            <p className="text-xs text-gray-500 mt-1">Пруф: {challenge.proof_hint}</p>
+                          )}
                         </div>
                         {isOrganizer && (
                           <div className="flex gap-1 shrink-0">
@@ -1187,6 +1198,14 @@ export function LobbyPage() {
                         </select>
                       </div>
                     </div>
+                    <div>
+                      <label className="text-xs text-gray-400 mb-1 block">Подсказка для пруфа</label>
+                      <Input
+                        placeholder="Что именно должно быть на скриншоте/видео"
+                        value={editChallenge.proof_hint}
+                        onChange={(e) => setEditChallenge(prev => ({ ...prev, proof_hint: e.target.value }))}
+                      />
+                    </div>
                     <div className="flex gap-2">
                       <NeonButton
                         size="sm"
@@ -1232,6 +1251,9 @@ export function LobbyPage() {
                       </div>
                       <h4 className="font-medium text-white mb-1">{challenge.title}</h4>
                       <p className="text-sm text-gray-400 mb-2">{challenge.description}</p>
+                      {challenge.proof_hint && (
+                        <p className="text-xs text-gray-500 mb-2">Пруф: {challenge.proof_hint}</p>
+                      )}
                       {challenge.proposed_by && (
                         <p className="text-xs text-gray-500 flex items-center gap-1">
                           <User className="w-3 h-3" /> Предложил: {challenge.proposed_by.nickname}
@@ -1310,6 +1332,9 @@ export function LobbyPage() {
                   </div>
                   <h4 className="font-medium text-white mb-1">{challenge.title}</h4>
                   <p className="text-sm text-gray-400">{challenge.description}</p>
+                  {challenge.proof_hint && (
+                    <p className="text-xs text-gray-500 mt-1">Пруф: {challenge.proof_hint}</p>
+                  )}
                 </div>
                 {challenge.status === 'pending' && (
                   <button
diff --git a/status-service/database.py b/status-service/database.py
index 4ece82b..c137dcb 100644
--- a/status-service/database.py
+++ b/status-service/database.py
@@ -90,7 +90,7 @@ def get_latency_history(service_name: str, hours: int = 24) -> list[dict]:
     conn = get_connection()
     cursor = conn.cursor()
 
-    since = datetime.now() - timedelta(hours=hours)
+    since = datetime.utcnow() - timedelta(hours=hours)
     cursor.execute("""
         SELECT latency_ms, status, checked_at
         FROM metrics
@@ -116,7 +116,7 @@ def get_uptime_stats(service_name: str, hours: int = 24) -> dict:
     conn = get_connection()
     cursor = conn.cursor()
 
-    since = datetime.now() - timedelta(hours=hours)
+    since = datetime.utcnow() - timedelta(hours=hours)
 
     cursor.execute("""
         SELECT COUNT(*) as total,
@@ -143,7 +143,7 @@ def get_avg_latency(service_name: str, hours: int = 24) -> Optional[float]:
     conn = get_connection()
     cursor = conn.cursor()
 
-    since = datetime.now() - timedelta(hours=hours)
+    since = datetime.utcnow() - timedelta(hours=hours)
     cursor.execute("""
         SELECT AVG(latency_ms) as avg_latency
         FROM metrics
@@ -249,11 +249,11 @@ def get_ssl_info(domain: str) -> Optional[dict]:
     return None
 
 
-def cleanup_old_metrics(days: int = 1):
-    """Delete metrics older than specified days (default: 24 hours)."""
+def cleanup_old_metrics(hours: int = 24):
+    """Delete metrics older than specified hours (default: 24 hours)."""
     conn = get_connection()
     cursor = conn.cursor()
-    cutoff = datetime.now() - timedelta(days=days)
+    cutoff = datetime.utcnow() - timedelta(hours=hours)
     cursor.execute("DELETE FROM metrics WHERE checked_at < ?", (cutoff.isoformat(),))
     deleted = cursor.rowcount
     conn.commit()
diff --git a/status-service/main.py b/status-service/main.py
index 102b0dd..c5241e4 100644
--- a/status-service/main.py
+++ b/status-service/main.py
@@ -9,7 +9,7 @@ from fastapi import FastAPI, Request
 from fastapi.responses import HTMLResponse
 from fastapi.templating import Jinja2Templates
 
-from monitors import ServiceMonitor
+from monitors import ServiceMonitor, Status
 from database import init_db, get_recent_incidents, get_latency_history, cleanup_old_metrics
 
 
@@ -19,52 +19,91 @@ FRONTEND_URL = os.getenv("FRONTEND_URL", "http://frontend:80")
 BOT_URL = os.getenv("BOT_URL", "http://bot:8080")
 EXTERNAL_URL = os.getenv("EXTERNAL_URL", "")  # Public URL for external checks
 PUBLIC_URL = os.getenv("PUBLIC_URL", "")  # Public HTTPS URL for SSL checks
-CHECK_INTERVAL = int(os.getenv("CHECK_INTERVAL", "600"))  # 10 minutes
+CHECK_INTERVAL = int(os.getenv("CHECK_INTERVAL", "60"))  # Normal interval (1 minute)
+FAST_CHECK_INTERVAL = int(os.getenv("FAST_CHECK_INTERVAL", "5"))  # Fast interval when issues detected
+STARTUP_GRACE_PERIOD = int(os.getenv("STARTUP_GRACE_PERIOD", "60"))  # Wait before alerting after startup
 
 # Initialize monitor
 monitor = ServiceMonitor()
+startup_time: Optional[datetime] = None  # Track when service started
 
 # Background task reference
 background_task: Optional[asyncio.Task] = None
 cleanup_task: Optional[asyncio.Task] = None
 
 
+def has_issues() -> bool:
+    """Check if any monitored service has issues."""
+    for name, svc in monitor.services.items():
+        # Skip external if not configured
+        if name == "external" and svc.status == Status.UNKNOWN:
+            continue
+        if svc.status in (Status.DOWN, Status.DEGRADED):
+            return True
+    return False
+
+
 async def periodic_health_check():
-    """Background task to check services periodically."""
+    """Background task to check services periodically with adaptive polling."""
     while True:
         try:
+            # Suppress alerts during startup grace period
+            suppress_alerts = is_in_grace_period()
+            if suppress_alerts:
+                remaining = STARTUP_GRACE_PERIOD - (datetime.now() - startup_time).total_seconds()
+                print(f"Grace period: {remaining:.0f}s remaining (alerts suppressed)")
+
             await monitor.check_all_services(
                 backend_url=BACKEND_URL,
                 frontend_url=FRONTEND_URL,
                 bot_url=BOT_URL,
                 external_url=EXTERNAL_URL,
-                public_url=PUBLIC_URL
+                public_url=PUBLIC_URL,
+                suppress_alerts=suppress_alerts
             )
         except Exception as e:
             print(f"Health check error: {e}")
-        await asyncio.sleep(CHECK_INTERVAL)
+
+        # Adaptive polling: check more frequently when issues detected
+        if has_issues():
+            await asyncio.sleep(FAST_CHECK_INTERVAL)
+        else:
+            await asyncio.sleep(CHECK_INTERVAL)
 
 
 async def periodic_cleanup():
-    """Background task to cleanup old metrics (hourly)."""
+    """Background task to cleanup old metrics (runs immediately, then hourly)."""
     while True:
-        await asyncio.sleep(3600)  # 1 hour
         try:
-            deleted = cleanup_old_metrics(days=1)  # Keep only last 24 hours
-            print(f"Cleaned up {deleted} old metrics")
+            deleted = cleanup_old_metrics(hours=24)  # Keep only last 24 hours
+            if deleted > 0:
+                print(f"Cleaned up {deleted} old metrics")
         except Exception as e:
             print(f"Cleanup error: {e}")
+        await asyncio.sleep(3600)  # Wait 1 hour before next cleanup
+
+
+def is_in_grace_period() -> bool:
+    """Check if we're still in startup grace period."""
+    if startup_time is None:
+        return True
+    elapsed = (datetime.now() - startup_time).total_seconds()
+    return elapsed < STARTUP_GRACE_PERIOD
 
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     """Startup and shutdown events."""
-    global background_task, cleanup_task
+    global background_task, cleanup_task, startup_time
 
     # Initialize database
     init_db()
     print("Database initialized")
 
+    # Mark startup time
+    startup_time = datetime.now()
+    print(f"Startup grace period: {STARTUP_GRACE_PERIOD}s (no alerts until services stabilize)")
+
     # Start background health checks
     background_task = asyncio.create_task(periodic_health_check())
     cleanup_task = asyncio.create_task(periodic_cleanup())
@@ -91,12 +130,20 @@ templates = Jinja2Templates(directory="templates")
 
 
 @app.get("/", response_class=HTMLResponse)
-async def status_page(request: Request):
+async def status_page(request: Request, period: int = 24):
     """Main status page."""
-    services = monitor.get_all_statuses()
+    # Validate period (1, 12, or 24 hours)
+    if period not in (1, 12, 24):
+        period = 24
+
+    services = monitor.get_all_statuses(period_hours=period)
     overall_status = monitor.get_overall_status()
     ssl_status = monitor.get_ssl_status()
     incidents = get_recent_incidents(limit=5)
+    fast_mode = has_issues()
+    current_interval = FAST_CHECK_INTERVAL if fast_mode else CHECK_INTERVAL
+    grace_period_active = is_in_grace_period()
+    grace_period_remaining = max(0, STARTUP_GRACE_PERIOD - (datetime.now() - startup_time).total_seconds()) if startup_time else 0
 
     return templates.TemplateResponse(
         "index.html",
@@ -107,7 +154,11 @@ async def status_page(request: Request):
             "ssl_status": ssl_status,
             "incidents": incidents,
             "last_check": monitor.last_check,
-            "check_interval": CHECK_INTERVAL
+            "check_interval": current_interval,
+            "fast_mode": fast_mode,
+            "grace_period_active": grace_period_active,
+            "grace_period_remaining": int(grace_period_remaining),
+            "period": period
         }
     )
 
@@ -118,13 +169,15 @@ async def api_status():
     services = monitor.get_all_statuses()
     overall_status = monitor.get_overall_status()
     ssl_status = monitor.get_ssl_status()
+    current_interval = FAST_CHECK_INTERVAL if has_issues() else CHECK_INTERVAL
 
     return {
         "overall_status": overall_status.value,
         "services": {name: status.to_dict() for name, status in services.items()},
         "ssl": ssl_status,
         "last_check": monitor.last_check.isoformat() if monitor.last_check else None,
-        "check_interval_seconds": CHECK_INTERVAL
+        "check_interval_seconds": current_interval,
+        "fast_mode": has_issues()
     }
 
 
diff --git a/status-service/monitors.py b/status-service/monitors.py
index 9c7a730..5459528 100644
--- a/status-service/monitors.py
+++ b/status-service/monitors.py
@@ -184,7 +184,8 @@ class ServiceMonitor:
         self,
         service_name: str,
         result: tuple,
-        now: datetime
+        now: datetime,
+        suppress_alerts: bool = False
     ):
         """Process check result with DB persistence and alerting."""
         if isinstance(result, Exception):
@@ -221,13 +222,14 @@ class ServiceMonitor:
         if stats["total_checks"] > 0:
             svc.uptime_percent = stats["uptime_percent"]
 
-        # Handle incident tracking and alerting
+        # Handle incident tracking and alerting (skip alerts during grace period)
         if is_down and not was_down:
             # Service just went down
             svc.last_incident = now
             incident_id = create_incident(service_name, status.value, message)
-            await alert_service_down(service_name, svc.display_name, message)
-            mark_incident_notified(incident_id)
+            if not suppress_alerts:
+                await alert_service_down(service_name, svc.display_name, message)
+                mark_incident_notified(incident_id)
 
         elif not is_down and was_down:
             # Service recovered
@@ -236,7 +238,8 @@ class ServiceMonitor:
                 started_at = datetime.fromisoformat(open_incident["started_at"])
                 downtime_minutes = int((now - started_at).total_seconds() / 60)
                 resolve_incident(service_name)
-                await alert_service_recovered(service_name, svc.display_name, downtime_minutes)
+                if not suppress_alerts:
+                    await alert_service_recovered(service_name, svc.display_name, downtime_minutes)
 
     async def check_all_services(
         self,
@@ -244,7 +247,8 @@ class ServiceMonitor:
         frontend_url: str,
         bot_url: str,
         external_url: str = "",
-        public_url: str = ""
+        public_url: str = "",
+        suppress_alerts: bool = False
     ):
         """Check all services concurrently."""
         now = datetime.now()
@@ -262,7 +266,7 @@ class ServiceMonitor:
         # Process results
         service_names = ["backend", "database", "frontend", "bot", "external"]
         for i, service_name in enumerate(service_names):
-            await self._process_check_result(service_name, results[i], now)
+            await self._process_check_result(service_name, results[i], now, suppress_alerts)
 
         # Check SSL certificate (if public URL is HTTPS)
         if public_url and public_url.startswith("https://"):
@@ -270,7 +274,15 @@ class ServiceMonitor:
 
         self.last_check = now
 
-    def get_all_statuses(self) -> dict[str, ServiceStatus]:
+    def get_all_statuses(self, period_hours: int = 24) -> dict[str, ServiceStatus]:
+        """Get all service statuses with data for specified period."""
+        # Update historical data for requested period
+        for name, svc in self.services.items():
+            svc.latency_history = get_latency_history(name, hours=period_hours)
+            svc.avg_latency_24h = get_avg_latency(name, hours=period_hours)
+            stats = get_uptime_stats(name, hours=period_hours)
+            if stats["total_checks"] > 0:
+                svc.uptime_percent = stats["uptime_percent"]
         return self.services
 
     def get_overall_status(self) -> Status:
diff --git a/status-service/templates/index.html b/status-service/templates/index.html
index cfadd2d..a51f82d 100644
--- a/status-service/templates/index.html
+++ b/status-service/templates/index.html
@@ -107,6 +107,32 @@
             font-size: 0.9rem;
         }
 
+        .fast-mode-badge {
+            display: inline-block;
+            margin-left: 8px;
+            padding: 2px 8px;
+            background: rgba(250, 204, 21, 0.15);
+            border: 1px solid rgba(250, 204, 21, 0.3);
+            border-radius: 12px;
+            color: #facc15;
+            font-size: 0.8rem;
+            font-weight: 500;
+            animation: pulse 2s infinite;
+        }
+
+        .grace-period-badge {
+            display: inline-block;
+            margin-left: 8px;
+            padding: 2px 8px;
+            background: rgba(59, 130, 246, 0.15);
+            border: 1px solid rgba(59, 130, 246, 0.3);
+            border-radius: 12px;
+            color: #3b82f6;
+            font-size: 0.8rem;
+            font-weight: 500;
+            animation: pulse 2s infinite;
+        }
+
         .services-grid {
             display: grid;
             gap: 16px;
@@ -347,6 +373,37 @@
             color: #64748b;
         }
 
+        .period-selector {
+            display: flex;
+            justify-content: center;
+            gap: 8px;
+            margin-bottom: 24px;
+        }
+
+        .period-btn {
+            padding: 8px 16px;
+            background: rgba(30, 41, 59, 0.5);
+            border: 1px solid rgba(100, 116, 139, 0.3);
+            border-radius: 8px;
+            color: #94a3b8;
+            font-size: 0.9rem;
+            font-weight: 500;
+            cursor: pointer;
+            transition: all 0.2s ease;
+            text-decoration: none;
+        }
+
+        .period-btn:hover {
+            border-color: rgba(0, 212, 255, 0.3);
+            color: #e2e8f0;
+        }
+
+        .period-btn.active {
+            background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(168, 85, 247, 0.2));
+            border-color: rgba(0, 212, 255, 0.5);
+            color: #00d4ff;
+        }
+
         .refresh-btn {
             display: inline-flex;
             align-items: center;
@@ -424,9 +481,21 @@
                     Checking services...
                 {% endif %}
                 &bull; Auto-refresh every {{ check_interval }}s
+                {% if grace_period_active %}
+                <span class="grace-period-badge">🚀 Startup ({{ grace_period_remaining }}s)</span>
+                {% elif fast_mode %}
+                <span class="fast-mode-badge">⚡ Fast Mode</span>
+                {% endif %}
             </p>
         </header>
 
+        <!-- Period Selector -->
+        <div class="period-selector">
+            <a href="?period=1" class="period-btn {% if period == 1 %}active{% endif %}">1 час</a>
+            <a href="?period=12" class="period-btn {% if period == 12 %}active{% endif %}">12 часов</a>
+            <a href="?period=24" class="period-btn {% if period == 24 %}active{% endif %}">24 часа</a>
+        </div>
+
         {% if ssl_status %}
         <div class="ssl-card {% if ssl_status.days_until_expiry <= 0 %}danger{% elif ssl_status.days_until_expiry <= 14 %}warning{% endif %}">
             <div class="ssl-header">
@@ -491,7 +560,7 @@
                         </div>
                     </div>
                     <div class="metric">
-                        <div class="metric-label">Avg 24h</div>
+                        <div class="metric-label">Avg {{ period }}h</div>
                         <div class="metric-value {% if service.avg_latency_24h and service.avg_latency_24h < 200 %}good{% elif service.avg_latency_24h and service.avg_latency_24h < 500 %}warning{% elif service.avg_latency_24h %}bad{% endif %}">
                             {% if service.avg_latency_24h %}
                                 {{ "%.0f"|format(service.avg_latency_24h) }} ms
@@ -501,7 +570,7 @@
                         </div>
                     </div>
                     <div class="metric">
-                        <div class="metric-label">Uptime 24h</div>
+                        <div class="metric-label">Uptime {{ period }}h</div>
                         <div class="metric-value {% if service.uptime_percent >= 99 %}good{% elif service.uptime_percent >= 95 %}warning{% else %}bad{% endif %}">
                             {{ "%.1f"|format(service.uptime_percent) }}%
                         </div>
@@ -620,13 +689,29 @@
         {% endif %}
         {% endfor %}
 
+        // Save scroll position before unload
+        window.addEventListener('beforeunload', () => {
+            sessionStorage.setItem('scrollPos', window.scrollY.toString());
+        });
+
+        // Restore scroll position on load
+        window.addEventListener('load', () => {
+            const scrollPos = sessionStorage.getItem('scrollPos');
+            if (scrollPos) {
+                window.scrollTo(0, parseInt(scrollPos));
+            }
+        });
+
         async function refreshStatus(btn) {
             btn.classList.add('loading');
             btn.disabled = true;
 
             try {
                 await fetch('/api/refresh', { method: 'POST' });
-                window.location.reload();
+                // Preserve period parameter on reload
+                const url = new URL(window.location);
+                url.searchParams.set('period', '{{ period }}');
+                window.location.href = url.toString();
             } catch (e) {
                 console.error('Refresh failed:', e);
                 btn.classList.remove('loading');
@@ -634,9 +719,11 @@
             }
         }
 
-        // Auto-refresh page
+        // Auto-refresh page (preserve period parameter)
         setTimeout(() => {
-            window.location.reload();
+            const url = new URL(window.location);
+            url.searchParams.set('period', '{{ period }}');
+            window.location.href = url.toString();
         }, {{ check_interval }} * 1000);
     </script>
 </body>