feat(led-driver): wifi tcp transport, hex mac in utf-8 hello

Made-with: Cursor

src/settings.py

@@ -21,6 +21,11 @@ class Settings(dict):
         self["debug"] = False
         self["default"] = "on"
         self["brightness"] = 32
+        # STA + TCP to led-controller (Pi): leave wifi_ssid empty for ESP-NOW-only (channel 1).
+        self["wifi_ssid"] = ""
+        self["wifi_password"] = ""
+        self["controller_host"] = ""
+        self["controller_port"] = 8765
 
     def save(self):
         try: