perf: Switch SocketIO from gevent to threading mode

gevent async_mode requires monkey-patching at startup and was causing
6-12s page load times (vs 1-2s before). Threading mode doesn't require
special setup and is sufficient for occasional Console commands.

- Change async_mode from 'gevent' to 'threading'
- Remove gevent/gevent-websocket from requirements (bridge has its own)

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

app/main.py

@@ -46,7 +46,9 @@ def create_app():
     app.register_blueprint(api_bp)
 
     # Initialize SocketIO with the app
-    socketio.init_app(app, cors_allowed_origins="*", async_mode='gevent')
+    # Using 'threading' mode for better compatibility with regular HTTP requests
+    # (gevent mode requires monkey-patching and slows down non-WebSocket requests)
+    socketio.init_app(app, cors_allowed_origins="*", async_mode='threading')
 
     # Initialize archive scheduler if enabled
     if config.MC_ARCHIVE_ENABLED:

requirements.txt

@@ -23,9 +23,7 @@ Pillow==10.1.0
 # HTTP Client for MeshCore Bridge communication
 requests==2.31.0
 
-# WebSocket support for console
+# WebSocket support for console (threading mode - no gevent needed)
 flask-socketio==5.3.6
 python-socketio==5.10.0
 python-engineio==4.8.1
-gevent==23.9.1
-gevent-websocket==0.10.1