Fix webapp.py for Python 3.13+ compatibility

- Remove deprecated eventlet dependency
- Use threading mode for Flask-SocketIO instead of eventlet
- eventlet is deprecated and has compatibility issues with Python 3.13
- Threading mode works reliably on all Python versions

This fixes the RuntimeError: Working outside of application context
errors when running webapp.py on Python 3.13.

requirements.txt

@@ -65,7 +65,8 @@ pydantic>=2.6.0
 flask>=3.0.2
 flask-cors>=4.0.0
 flask-socketio>=5.3.6
-eventlet>=0.36.0
+# eventlet removed - deprecated and incompatible with Python 3.13
+# Using threading mode for SocketIO instead
 python-socketio>=5.11.0
 werkzeug>=3.0.1
 

webapp.py

@@ -34,10 +34,9 @@ from flask import Flask, request, jsonify, send_file, send_from_directory, Respo
 from flask_cors import CORS
 from flask_socketio import SocketIO, emit
 from werkzeug.utils import secure_filename
-import eventlet
 
-# Enable eventlet for async operations
-eventlet.monkey_patch()
+# Note: Using threading mode instead of eventlet for Python 3.13+ compatibility
+# eventlet is deprecated and has issues with newer Python versions
 
 # Configuration
 UPLOAD_FOLDER = Path.home() / ".config" / "videogen" / "webapp" / "uploads"
@@ -62,7 +61,8 @@ app.config['MAX_CONTENT_LENGTH'] = 500 * 1024 * 1024  # 500MB max upload
 app.config['SECRET_KEY'] = os.environ.get('SECRET_KEY', 'videogen-webapp-secret-key')
 
 CORS(app)
-socketio = SocketIO(app, cors_allowed_origins="*", async_mode='eventlet')
+# Use threading mode for Python 3.13+ compatibility (eventlet is deprecated)
+socketio = SocketIO(app, cors_allowed_origins="*", async_mode='threading')
 
 # Job storage
 @dataclass