feat: Move notification settings to user profile and add i18n support

- Move notification config from system settings (.env) to user profile (database)
- Add user-specific notification settings API endpoints (GET/PUT /api/user/notification-settings)
- Add notification_settings column to qd_users table
- Update portfolio and trading-assistant to use profile notification settings
- Add notification settings UI in profile page with all channels (browser, telegram, email, phone, discord, webhook)
- Add i18n translations for notification settings in 10 languages
- Fix timestamp parsing in TradingRecords and portfolio (handle both ISO strings and Unix timestamps)
- Fix header icons alignment for mobile responsive layout
- Fix equity curve timestamp bug (handle datetime objects properly)
- Remove unused login.js exports and clean up user.js store
- Remove husky, commitlint and other dev dependencies
- Clean up env.example by removing user-specific notification params
- Update signal_notifier to prioritize user-specific tokens over global env vars

backend_api_python/app/utils/config_loader.py

@@ -71,10 +71,6 @@ def load_addon_config() -> Dict[str, Any]:
         ('OPENROUTER_CONNECT_TIMEOUT', 'openrouter.connect_timeout', 'int'),
         ('AI_MODELS_JSON', 'ai.models', 'json'),
 
-        # Market
-        ('MARKET_TYPES_JSON', 'market.types', 'json'),
-        ('TRADING_SUPPORTED_SYMBOLS_JSON', 'trading.supported_symbols', 'json'),
-
         # App
         ('CORS_ORIGINS', 'app.cors_origins', 'string'),
         ('RATE_LIMIT', 'app.rate_limit', 'int'),