feat: Complete Real-Time Sync implementation 🔄

BACKEND:
- Fix JWT authentication in FamiliesGateway
  * Configure JwtModule with ConfigService in FamiliesModule
  * Load JWT_SECRET from environment variables
  * Enable proper token verification for WebSocket connections
- Fix circular dependency in TrackingModule
  * Use forwardRef pattern for FamiliesGateway injection
  * Make FamiliesGateway optional in TrackingService
  * Emit WebSocket events when activities are created/updated/deleted

FRONTEND:
- Create WebSocket service (336 lines)
  * Socket.IO client with auto-reconnection (exponential backoff 1s → 30s)
  * Family room join/leave management
  * Presence tracking (online users per family)
  * Event handlers for activities, children, members
  * Connection recovery with auto-rejoin
- Create useWebSocket hook (187 lines)
  * Auto-connect on user authentication
  * Auto-join user's family room
  * Connection status tracking
  * Presence indicators
  * Hooks: useRealTimeActivities, useRealTimeChildren, useRealTimeFamilyMembers
- Expose access token in AuthContext
  * Add token property to AuthContextType interface
  * Load token from tokenStorage on initialization
  * Update token state on login/register/logout
  * Enable WebSocket authentication
- Integrate real-time sync across app
  * AppShell: Connection status indicator + online count badge
  * Activities page: Auto-refresh on family activity events
  * Home page: Auto-refresh daily summary on activity changes
  * Family page: Real-time member updates
- Fix accessibility issues
  * Remove deprecated legacyBehavior from Link components (Next.js 15)
  * Fix color contrast in EmailVerificationBanner (WCAG AA)
  * Add missing aria-labels to IconButtons
  * Fix React key warnings in family member list

DOCUMENTATION:
- Update implementation-gaps.md
  * Mark Real-Time Sync as COMPLETED ✅
  * Document WebSocket room management implementation
  * Document connection recovery and presence indicators
  * Update summary statistics (49 features completed)

FILES CREATED:
- maternal-web/hooks/useWebSocket.ts (187 lines)
- maternal-web/lib/websocket.ts (336 lines)

FILES MODIFIED (14):
Backend (4):
- families.gateway.ts (JWT verification fix)
- families.module.ts (JWT config with ConfigService)
- tracking.module.ts (forwardRef for FamiliesModule)
- tracking.service.ts (emit WebSocket events)

Frontend (9):
- lib/auth/AuthContext.tsx (expose access token)
- components/layouts/AppShell/AppShell.tsx (connection status + presence)
- app/activities/page.tsx (real-time activity updates)
- app/page.tsx (real-time daily summary refresh)
- app/family/page.tsx (accessibility fixes)
- app/(auth)/login/page.tsx (remove legacyBehavior)
- components/common/EmailVerificationBanner.tsx (color contrast fix)

Documentation (1):
- docs/implementation-gaps.md (updated status)

IMPACT:
✅ Real-time family collaboration achieved
✅ Activities sync instantly across all family members' devices
✅ Presence tracking shows who's online
✅ Connection recovery handles poor network conditions
✅ Accessibility improvements (WCAG AA compliance)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

maternal-web/app/(auth)/login/page.tsx

@@ -239,11 +239,14 @@ export default function LoginPage() {
             />
 
             <Box sx={{ textAlign: 'right', mt: 1 }}>
-              <Link href="/forgot-password" passHref legacyBehavior>
-                <MuiLink variant="body2" sx={{ cursor: 'pointer' }}>
-                  Forgot password?
-                </MuiLink>
-              </Link>
+              <MuiLink
+                component={Link}
+                href="/forgot-password"
+                variant="body2"
+                sx={{ cursor: 'pointer', textDecoration: 'none' }}
+              >
+                Forgot password?
+              </MuiLink>
             </Box>
 
             <Button