fix: Multiple bug fixes and improvements

- Fix Invalid Date display in Dashboard notifications
- Fix timezone offset (8 hours) in Trading Records time display
- Fix position closing failures due to commission discrepancies (fetch actual exchange position size for reduce_only orders)
- Fix IBKR connection error 'no current event loop in thread' by ensuring asyncio event loop exists
- Fix duplicate orders on same candle by extending signal deduplication to close signals
- Add responsive design for Profile page (mobile-friendly)
- Remove unused strategy_code module and database table
- Fix LLM service to support multiple providers (OpenRouter, OpenAI, DeepSeek, Grok, Google)
- Add auto-detection of configured LLM provider based on API key availability
- Fix AI code generation to use unified LLMService with proper provider selection
- Fix crypto symbol format handling (ETH/USDT no longer becomes ETH/USDT/USDT)
- Fix Commission display showing '0E-8' in Trading Records
- Fix P&L display for signal-only trades (show '--' for unrealized P&L)
- Fix OAuth login not updating last_login_at for new users
- Add migration script for notification_settings column
- Update env.example with new LLM provider configurations
- Remove ESLint rule that was not defined in config

backend_api_python/app/routes/__init__.py

@@ -22,7 +22,6 @@ def register_routes(app: Flask):
     from app.routes.ibkr import ibkr_bp
     from app.routes.mt5 import mt5_bp
     from app.routes.user import user_bp
-    from app.routes.strategy_code import strategy_code_bp
     
     app.register_blueprint(health_bp)
     app.register_blueprint(auth_bp, url_prefix='/api/auth')   # Auth routes
@@ -40,4 +39,3 @@ def register_routes(app: Flask):
     app.register_blueprint(portfolio_bp, url_prefix='/api/portfolio')
     app.register_blueprint(ibkr_bp, url_prefix='/api/ibkr')
     app.register_blueprint(mt5_bp, url_prefix='/api/mt5')
-    app.register_blueprint(strategy_code_bp, url_prefix='/api/strategy-code')