Fix Socket.IO connection with enhanced error handling and remote server detection in launch script

launch_qt.sh

@@ -104,13 +104,42 @@ fi
 # Check if Flask server is running
 echo ""
 echo "Checking Flask server..."
-if curl -s http://localhost:5000/library.json > /dev/null 2>&1; then
+
-    echo "✅ Flask server is running on port 5000"
+# Try to read server URL from settings
+SERVER_URL="http://localhost:5000"
+SETTINGS_FILE="$HOME/.techdj_settings.json"
+
+if [ -f "$SETTINGS_FILE" ]; then
+    # Extract server_url from JSON if jq is available
+    if command -v jq &> /dev/null; then
+        SAVED_URL=$(jq -r '.server_url // "http://localhost:5000"' "$SETTINGS_FILE" 2>/dev/null)
+        if [ ! -z "$SAVED_URL" ] && [ "$SAVED_URL" != "null" ]; then
+            SERVER_URL="$SAVED_URL"
+        fi
     else
-    echo "⚠️  Flask server not detected on port 5000"
+        # Fallback: simple grep if jq not available
-    echo "Please start the server first:"
+        SAVED_URL=$(grep -o '"server_url"[[:space:]]*:[[:space:]]*"[^"]*"' "$SETTINGS_FILE" 2>/dev/null | cut -d'"' -f4)
+        if [ ! -z "$SAVED_URL" ]; then
+            SERVER_URL="$SAVED_URL"
+        fi
+    fi
+fi
+
+echo "Checking server at: $SERVER_URL"
+
+if curl -s --max-time 5 "${SERVER_URL}/library.json" > /dev/null 2>&1; then
+    echo "✅ Flask server is running at $SERVER_URL"
+else
+    echo "⚠️  Flask server not detected at $SERVER_URL"
+    echo "Please make sure the server is running."
+    echo ""
+    echo "For local server:"
     echo "  python3 server.py"
     echo ""
+    echo "For remote server:"
+    echo "  Make sure server.py is running on the remote machine"
+    echo "  and the URL in Settings (⚙️) is correct."
+    echo ""
     read -p "Continue anyway? (y/n) " -n 1 -r
     echo
     if [[ ! $REPLY =~ ^[Yy]$ ]]; then

techdj_qt.py

@@ -1836,13 +1836,39 @@ class TechDJMainWindow(QMainWindow):
             # Start broadcast
             try:
                 if self.socket is None:
-                    self.socket = socketio.Client()
+                    print(f"🔌 Connecting to server: {self.server_url}")
+                    self.socket = socketio.Client(logger=True, engineio_logger=False)
+                    
+                    # Add connection event handlers
+                    @self.socket.on('connect')
+                    def on_connect():
+                        print("✅ Socket.IO connected successfully")
+                    
+                    @self.socket.on('connect_error')
+                    def on_connect_error(data):
+                        print(f"❌ Socket.IO connection error: {data}")
+                        QMessageBox.warning(self, "Connection Error", 
+                            f"Failed to connect to server at {self.server_url}\n\nError: {data}")
+                    
+                    @self.socket.on('disconnect')
+                    def on_disconnect():
+                        print("⚠️ Socket.IO disconnected")
+                    
                     self.socket.on('listener_count', self.on_listener_count)
-                    self.socket.connect(self.server_url)
+                    
+                    try:
+                        self.socket.connect(self.server_url, wait_timeout=10)
+                        print("✅ Connection established")
+                    except Exception as e:
+                        print(f"❌ Connection failed: {e}")
+                        QMessageBox.critical(self, "Connection Failed", 
+                            f"Could not connect to {self.server_url}\n\nError: {str(e)}\n\nMake sure the server is running.")
+                        return
                 
                 bitrate_map = {0: "128k", 1: "96k", 2: "64k", 3: "48k", 4: "32k"}
                 bitrate = bitrate_map.get(self.quality_combo.currentIndex(), "96k")
                 
+                print(f"📡 Emitting start_broadcast with bitrate: {bitrate}")
                 self.socket.emit('start_broadcast', {
                     'bitrate': bitrate,
                     'format': 'mp3'