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/storage/device_store.py

@@ -4,7 +4,7 @@ import json
 import uuid
 from datetime import datetime
 from pathlib import Path
-from typing import Dict, List, Optional
+from typing import Dict, List, Optional, Tuple
 
 from wled_controller.core.capture.calibration import (
     CalibrationConfig,
@@ -35,6 +35,7 @@ class Device:
         baud_rate: Optional[int] = None,
         software_brightness: int = 255,
         auto_shutdown: bool = False,
+        static_color: Optional[Tuple[int, int, int]] = None,
         calibration: Optional[CalibrationConfig] = None,
         created_at: Optional[datetime] = None,
         updated_at: Optional[datetime] = None,
@@ -48,6 +49,7 @@ class Device:
         self.baud_rate = baud_rate
         self.software_brightness = software_brightness
         self.auto_shutdown = auto_shutdown
+        self.static_color = static_color
         self.calibration = calibration or create_default_calibration(led_count)
         self.created_at = created_at or datetime.utcnow()
         self.updated_at = updated_at or datetime.utcnow()
@@ -71,6 +73,8 @@ class Device:
             d["software_brightness"] = self.software_brightness
         if self.auto_shutdown:
             d["auto_shutdown"] = True
+        if self.static_color is not None:
+            d["static_color"] = list(self.static_color)
         return d
 
     @classmethod
@@ -87,6 +91,9 @@ class Device:
             else create_default_calibration(data["led_count"])
         )
 
+        static_color_raw = data.get("static_color")
+        static_color = tuple(static_color_raw) if static_color_raw else None
+
         return cls(
             device_id=data["id"],
             name=data["name"],
@@ -97,6 +104,7 @@ class Device:
             baud_rate=data.get("baud_rate"),
             software_brightness=data.get("software_brightness", 255),
             auto_shutdown=data.get("auto_shutdown", False),
+            static_color=static_color,
             calibration=calibration,
             created_at=datetime.fromisoformat(data.get("created_at", datetime.utcnow().isoformat())),
             updated_at=datetime.fromisoformat(data.get("updated_at", datetime.utcnow().isoformat())),
@@ -256,6 +264,18 @@ class DeviceStore:
         logger.info(f"Updated device {device_id}")
         return device
 
+    def set_static_color(
+        self, device_id: str, color: Optional[Tuple[int, int, int]]
+    ) -> "Device":
+        """Set or clear the static idle color for a device."""
+        device = self._devices.get(device_id)
+        if not device:
+            raise ValueError(f"Device {device_id} not found")
+        device.static_color = color
+        device.updated_at = datetime.utcnow()
+        self.save()
+        return device
+
     def delete_device(self, device_id: str):
         """Delete device."""
         if device_id not in self._devices: