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/schemas/__init__.py

@@ -1,8 +1,27 @@
 """Schemas package - exports all Pydantic schemas."""
 
 from app.schemas.user import User, UserCreate, UserUpdate, UserInDB
-from app.schemas.auth import Token, TokenData, LoginRequest, RegisterRequest
+from app.schemas.auth import Token, TokenData, LoginRequest, RegisterRequest, TokenWith2FA, Verify2FARequest
 from app.schemas.settings import Setting, SettingUpdate
+from app.schemas.audit_log import AuditLog as AuditLogSchema, AuditLogCreate, AuditLogList, AuditLogStats
+from app.schemas.webhook import (
+    Webhook as WebhookSchema,
+    WebhookCreate,
+    WebhookUpdate,
+    WebhookWithSecret,
+    WebhookDelivery as WebhookDeliverySchema,
+    WebhookTest,
+    WEBHOOK_EVENTS,
+)
+from app.schemas.file import (
+    StoredFile as StoredFileSchema,
+    FileCreate,
+    FileUpdate,
+    FileUploadResponse,
+    FileListResponse,
+    ALLOWED_CONTENT_TYPES,
+    MAX_FILE_SIZE,
+)
 
 __all__ = [
     "User",
@@ -13,6 +32,26 @@ __all__ = [
     "TokenData",
     "LoginRequest",
     "RegisterRequest",
+    "TokenWith2FA",
+    "Verify2FARequest",
     "Setting",
     "SettingUpdate",
+    "AuditLogSchema",
+    "AuditLogCreate",
+    "AuditLogList",
+    "AuditLogStats",
+    "WebhookSchema",
+    "WebhookCreate",
+    "WebhookUpdate",
+    "WebhookWithSecret",
+    "WebhookDeliverySchema",
+    "WebhookTest",
+    "WEBHOOK_EVENTS",
+    "StoredFileSchema",
+    "FileCreate",
+    "FileUpdate",
+    "FileUploadResponse",
+    "FileListResponse",
+    "ALLOWED_CONTENT_TYPES",
+    "MAX_FILE_SIZE",
 ]