Add comprehensive backend features and mobile UI improvements

Backend:
- Add 2FA authentication with TOTP support
- Add API keys management system
- Add audit logging for security events
- Add file upload/management system
- Add notifications system with preferences
- Add session management
- Add webhooks integration
- Add analytics endpoints
- Add export functionality
- Add password policy enforcement
- Add new database migrations for core tables

Frontend:
- Add module position system (top/bottom sidebar sections)
- Add search and notifications module configuration tabs
- Add mobile logo replacing hamburger menu
- Center page title absolutely when no tabs present
- Align sidebar footer toggles with navigation items
- Add lighter icon color in dark theme for mobile
- Add API keys management page
- Add notifications page with context
- Add admin analytics and audit logs pages

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/app/api/v1/router.py

@@ -2,7 +2,7 @@
 
 from fastapi import APIRouter
 
-from app.api.v1 import health, auth, users, settings
+from app.api.v1 import health, auth, users, settings, audit, api_keys, notifications, two_factor, sessions, analytics, export, webhooks, files
 
 
 # Create main API v1 router
@@ -11,5 +11,14 @@ router = APIRouter()
 # Include all sub-routers
 router.include_router(health.router, prefix="/health", tags=["Health"])
 router.include_router(auth.router, prefix="/auth", tags=["Authentication"])
+router.include_router(two_factor.router, prefix="/2fa", tags=["Two-Factor Auth"])
+router.include_router(sessions.router, prefix="/sessions", tags=["Sessions"])
 router.include_router(users.router, prefix="/users", tags=["Users"])
 router.include_router(settings.router, prefix="/settings", tags=["Settings"])
+router.include_router(audit.router, prefix="/audit", tags=["Audit"])
+router.include_router(api_keys.router, prefix="/api-keys", tags=["API Keys"])
+router.include_router(notifications.router, prefix="/notifications", tags=["Notifications"])
+router.include_router(analytics.router, prefix="/analytics", tags=["Analytics"])
+router.include_router(export.router, prefix="/export", tags=["Export/Import"])
+router.include_router(webhooks.router, prefix="/webhooks", tags=["Webhooks"])
+router.include_router(files.router, prefix="/files", tags=["Files"])