Add static color for simple devices, change auto-shutdown to auto-restore

- Add `static_color` capability to Adalight provider with `set_color()` method
- Add `static_color` field to Device model, DeviceState, and API schemas
- Add GET/PUT `/devices/{id}/color` API endpoints
- Change auto-shutdown behavior: restore device to idle state instead of
  powering off (WLED uses snapshot/restore, Adalight sends static color
  or black frame)
- Rename `_auto_shutdown_device_if_idle` to `_restore_device_idle_state`
- Add inline color picker on device cards for devices with static_color
- Add auto_shutdown toggle to device settings modal
- Update labels from "Auto Shutdown" to "Auto Restore" (en + ru)
- Remove backward-compat KC aliases from ProcessorManager
- Align card action buttons to bottom with flex column layout

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

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

@@ -1,6 +1,6 @@
 """Adalight device provider — serial LED controller support."""
 
-from typing import List
+from typing import List, Tuple
 
 import numpy as np
 
@@ -27,7 +27,7 @@ class AdalightDeviceProvider(LEDDeviceProvider):
         # manual_led_count: user must specify LED count (can't auto-detect)
         # power_control: can blank LEDs by sending all-black pixels
         # brightness_control: software brightness (multiplies pixel values before sending)
-        return {"manual_led_count", "power_control", "brightness_control"}
+        return {"manual_led_count", "power_control", "brightness_control", "static_color"}
 
     def create_client(self, url: str, **kwargs) -> LEDClient:
         from wled_controller.core.devices.adalight_client import AdalightClient
@@ -123,3 +123,24 @@ class AdalightDeviceProvider(LEDDeviceProvider):
             logger.info(f"Adalight power off: sent black frame to {url}")
         finally:
             await client.close()
+
+    async def set_color(self, url: str, color: Tuple[int, int, int], **kwargs) -> None:
+        """Send a solid color frame to the Adalight device.
+
+        Requires kwargs: led_count (int), baud_rate (int | None).
+        """
+        led_count = kwargs.get("led_count", 0)
+        baud_rate = kwargs.get("baud_rate")
+        if led_count <= 0:
+            raise ValueError("led_count is required to send color frame to Adalight device")
+
+        from wled_controller.core.devices.adalight_client import AdalightClient
+
+        client = AdalightClient(url, led_count=led_count, baud_rate=baud_rate)
+        try:
+            await client.connect()
+            frame = np.full((led_count, 3), color, dtype=np.uint8)
+            await client.send_pixels(frame, brightness=255)
+            logger.info(f"Adalight set_color: sent solid {color} to {url}")
+        finally:
+            await client.close()

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

@@ -210,6 +210,10 @@ class LEDDeviceProvider(ABC):
         """Set device power state. Override if capabilities include power_control."""
         raise NotImplementedError
 
+    async def set_color(self, url: str, color: Tuple[int, int, int], **kwargs) -> None:
+        """Set all LEDs to a solid color. Override if capabilities include static_color."""
+        raise NotImplementedError
+
 
 # ===== PROVIDER REGISTRY =====