Add auto-discovery support (UDP discovery responder & subnet scanner) and implement virtual screen MCP server

mcp_server.py

@@ -26,9 +26,30 @@ class MCPServer:
         # Set socket to non-blocking so the main loop can run animations concurrently
         self.sock.setblocking(False)
         print(f"MCP server listening on port {port}...")
+        
+        # Setup UDP socket for auto-discovery on port 5000
+        try:
+            self.udp_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+            self.udp_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+            self.udp_sock.bind(('', 5000))
+            self.udp_sock.setblocking(False)
+            print("UDP Discovery responder listening on port 5000...")
+        except Exception as ue:
+            print("Failed to bind UDP Discovery socket: {}".format(ue))
+            self.udp_sock = None
 
     def update(self):
         """Check for incoming HTTP requests and handle them non-blockingly."""
+        # 1. Handle UDP Discovery queries
+        if hasattr(self, 'udp_sock') and self.udp_sock is not None:
+            try:
+                data, addr = self.udp_sock.recvfrom(128)
+                if data == b"DISCOVER_SCREEN":
+                    self.udp_sock.sendto(b"SCREEN_IP_80", addr)
+            except OSError:
+                pass
+                
+        # 2. Check for incoming HTTP TCP connections
         if self.sock is None:
             return