Fix autorestore logic and protocol badge per device type

Autorestore fixes:
- Snapshot WLED state before connect() mutates it (lor, AudioReactive)
- Gate restore on auto_shutdown setting (was unconditional)
- Remove misleading auto_restore capability from serial provider
- Default auto_shutdown to false for all new devices

Protocol badge fixes:
- Show correct protocol per device type (OpenRGB SDK, MQTT, WebSocket)
- Was showing "Serial" for all non-WLED devices

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/core/devices/serial_provider.py

@@ -29,8 +29,7 @@ class SerialDeviceProvider(LEDDeviceProvider):
         # power_control: can blank LEDs by sending all-black pixels
         # brightness_control: software brightness (multiplies pixel values before sending)
         # health_check: serial port availability probe
-        # auto_restore: blank LEDs when targets stop
-        return {"manual_led_count", "power_control", "brightness_control", "health_check", "auto_restore"}
+        return {"manual_led_count", "power_control", "brightness_control", "health_check"}
 
     async def check_health(self, url: str, http_client, prev_health=None) -> DeviceHealth:
         # Generic serial port health check — enumerate COM ports

server/src/wled_controller/core/devices/wled_client.py

@@ -82,6 +82,7 @@ class WLEDClient(LEDClient):
         self._client: Optional[httpx.AsyncClient] = None
         self._ddp_client: Optional[DDPClient] = None
         self._connected = False
+        self._pre_connect_state: Optional[dict] = None
 
     async def connect(self) -> bool:
         """Establish connection to WLED device.
@@ -107,6 +108,9 @@ class WLEDClient(LEDClient):
                 )
                 self.use_ddp = True
 
+            # Snapshot device state BEFORE any mutations (for auto-restore)
+            self._pre_connect_state = await self.snapshot_device_state()
+
             # Create DDP client if needed
             if self.use_ddp:
                 self._ddp_client = DDPClient(self.host, rgbw=False)
@@ -465,7 +469,14 @@ class WLEDClient(LEDClient):
     # ===== LEDClient abstraction methods =====
 
     async def snapshot_device_state(self) -> Optional[dict]:
-        """Snapshot WLED state before streaming (on, lor, AudioReactive)."""
+        """Snapshot WLED state (on, lor, AudioReactive).
+
+        If connect() already captured a pre-mutation snapshot, returns that
+        instead of the current (potentially already-modified) state.
+        """
+        # Return pre-connect snapshot if available (captured before DDP setup)
+        if hasattr(self, '_pre_connect_state') and self._pre_connect_state is not None:
+            return self._pre_connect_state
         if not self._client:
             return None
         try: