Add: Advanced diagnostic tools for production debugging

New Diagnostic Endpoints:
- /test-simulation: Full simulation flow testing
- /api/test-websocket: WebSocket connectivity testing

Enhanced Browser Testing:
- testWebSocket(): Test real-time communication
- testDistributionChart(): Enhanced chart diagnostics
- WebSocket test message handler for live testing

Debugging Improvements:
- Real-time WebSocket message testing
- Manual chart update testing
- Complete simulation data flow validation
- End-to-end connectivity verification

These tools will help identify the exact failure point
in the wealth distribution histogram issue.

app/routes/api.py

@@ -18,6 +18,42 @@ from app import simulation_manager
 api_bp = Blueprint('api', __name__)
 
 
+@api_bp.route('/test-websocket', methods=['GET'])
+def test_websocket():
+    """
+    Test WebSocket connectivity and emit test data.
+    
+    Returns:
+        JSON response indicating WebSocket test status
+    """
+    try:
+        # Emit a test message to all connected clients
+        test_data = {
+            'test': True,
+            'message': 'WebSocket test from server',
+            'timestamp': time.time(),
+            'distribution': {
+                'labels': ['Test $0-100', 'Test $100-200', 'Test $200-300'],
+                'counts': [3, 5, 2]
+            }
+        }
+        
+        socketio.emit('websocket_test', test_data, broadcast=True)
+        
+        return jsonify({
+            'status': 'success',
+            'message': 'WebSocket test message sent',
+            'test_data': test_data
+        })
+        
+    except Exception as e:
+        current_app.logger.error(f"WebSocket test error: {str(e)}")
+        return jsonify({
+            'status': 'error',
+            'message': f'WebSocket test failed: {str(e)}'
+        }), 500
+
+
 @api_bp.route('/simulation', methods=['POST'])
 def create_simulation():
     """