Remove idle color feature, simplify power to turn-off only, fix settings serial port bug

- Remove static/idle color from entire stack (storage, API, processing, UI, CSS, locales)
- Simplify device power button to turn-off only (send black frame, no toggle)
- Send black frame on serial port close (AdalightClient.close)
- Fix settings modal serial port dropdown showing WLED devices due to stale deviceType

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

server/src/wled_controller/api/routes/devices.py

@@ -22,7 +22,6 @@ from wled_controller.api.schemas.devices import (
     DeviceUpdate,
     DiscoveredDeviceResponse,
     DiscoverDevicesResponse,
-    StaticColorUpdate,
 )
 from wled_controller.core.processing.processor_manager import ProcessorManager
 from wled_controller.storage import DeviceStore
@@ -45,7 +44,6 @@ def _device_to_response(device) -> DeviceResponse:
         enabled=device.enabled,
         baud_rate=device.baud_rate,
         auto_shutdown=device.auto_shutdown,
-        static_color=list(device.static_color) if device.static_color else None,
         capabilities=sorted(get_device_capabilities(device.device_type)),
         created_at=device.created_at,
         updated_at=device.updated_at,
@@ -399,13 +397,6 @@ async def set_device_brightness(
         if ds:
             ds.hardware_brightness = bri
 
-        # If device is idle with a static color, re-send it at the new brightness
-        if ds and ds.static_color is not None and not manager.is_device_processing(device_id):
-            try:
-                await manager.send_static_color(device_id, ds.static_color)
-            except Exception:
-                pass
-
         return {"brightness": bri}
     except Exception as e:
         logger.error(f"Failed to set brightness for {device_id}: {e}")
@@ -465,11 +456,7 @@ async def set_device_power(
         # For serial devices, use the cached idle client to avoid port conflicts
         ds = manager._devices.get(device_id)
         if device.device_type in ("adalight", "ambiled") and ds:
-            if on:
-                # Restore idle state (static color or stay dark)
-                if ds.static_color is not None:
-                    await manager.send_static_color(device_id, ds.static_color)
-            else:
+            if not on:
                 await manager._send_clear_pixels(device_id)
             ds.power_on = on
         else:
@@ -484,61 +471,3 @@ async def set_device_power(
         raise HTTPException(status_code=502, detail=f"Failed to reach device: {e}")
 
 
-# ===== STATIC COLOR ENDPOINTS =====
-
-
-@router.get("/api/v1/devices/{device_id}/color", tags=["Settings"])
-async def get_device_color(
-    device_id: str,
-    _auth: AuthRequired,
-    store: DeviceStore = Depends(get_device_store),
-):
-    """Get the static idle color for a device."""
-    device = store.get_device(device_id)
-    if not device:
-        raise HTTPException(status_code=404, detail=f"Device {device_id} not found")
-    if "static_color" not in get_device_capabilities(device.device_type):
-        raise HTTPException(status_code=400, detail="Static color is not supported for this device type")
-    return {"color": list(device.static_color) if device.static_color else None}
-
-
-@router.put("/api/v1/devices/{device_id}/color", tags=["Settings"])
-async def set_device_color(
-    device_id: str,
-    body: StaticColorUpdate,
-    _auth: AuthRequired,
-    store: DeviceStore = Depends(get_device_store),
-    manager: ProcessorManager = Depends(get_processor_manager),
-):
-    """Set or clear the static idle color for a device."""
-    device = store.get_device(device_id)
-    if not device:
-        raise HTTPException(status_code=404, detail=f"Device {device_id} not found")
-    if "static_color" not in get_device_capabilities(device.device_type):
-        raise HTTPException(status_code=400, detail="Static color is not supported for this device type")
-
-    color = None
-    if body.color is not None:
-        if len(body.color) != 3 or not all(isinstance(c, int) and 0 <= c <= 255 for c in body.color):
-            raise HTTPException(status_code=400, detail="color must be [R, G, B] with values 0-255")
-        color = tuple(body.color)
-
-    store.set_static_color(device_id, color)
-
-    # Update runtime state
-    ds = manager._devices.get(device_id)
-    if ds:
-        ds.static_color = color
-
-    # If device is idle, apply the change immediately
-    if not manager.is_device_processing(device_id):
-        try:
-            if color is not None:
-                await manager.send_static_color(device_id, color)
-            else:
-                await manager.clear_device(device_id)
-        except Exception as e:
-            logger.warning(f"Failed to apply color change immediately: {e}")
-
-    return {"color": list(color) if color else None}
-