Add capture template system with in-memory defaults and split device settings UI

- Generate default templates (MSS, DXcam, WGC) in memory from EngineRegistry at startup
- Only persist user-created templates to JSON, skip defaults on load/save
- Add capture_template_id to Device model and DeviceCreate schema
- Remember last used template in localStorage, use it for new devices with fallback
- Split Device Settings dialog into General Settings and Capture Settings
- Add capture settings button (🎬) to device card
- Separate default and custom templates with visual separator in Templates tab
- Add capture engine integration to ProcessorManager
- Add CLAUDE.md with git commit/push policy and server restart instructions
- Add en/ru localization for all new UI elements

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

server/src/wled_controller/storage/device_store.py

@@ -30,6 +30,7 @@ class Device:
         enabled: bool = True,
         settings: Optional[ProcessingSettings] = None,
         calibration: Optional[CalibrationConfig] = None,
+        capture_template_id: str = "tpl_mss_default",
         created_at: Optional[datetime] = None,
         updated_at: Optional[datetime] = None,
     ):
@@ -43,6 +44,7 @@ class Device:
             enabled: Whether device is enabled
             settings: Processing settings
             calibration: Calibration configuration
+            capture_template_id: ID of assigned capture template
             created_at: Creation timestamp
             updated_at: Last update timestamp
         """
@@ -53,6 +55,7 @@ class Device:
         self.enabled = enabled
         self.settings = settings or ProcessingSettings()
         self.calibration = calibration or create_default_calibration(led_count)
+        self.capture_template_id = capture_template_id
         self.created_at = created_at or datetime.utcnow()
         self.updated_at = updated_at or datetime.utcnow()
 
@@ -80,6 +83,7 @@ class Device:
                 "state_check_interval": self.settings.state_check_interval,
             },
             "calibration": calibration_to_dict(self.calibration),
+            "capture_template_id": self.capture_template_id,
             "created_at": self.created_at.isoformat(),
             "updated_at": self.updated_at.isoformat(),
         }
@@ -117,6 +121,12 @@ class Device:
             else create_default_calibration(data["led_count"])
         )
 
+        # Migration: assign default MSS template if no template set
+        capture_template_id = data.get("capture_template_id")
+        if not capture_template_id:
+            capture_template_id = "tpl_mss_default"
+            logger.info(f"Migrating device {data['id']} to default MSS template")
+
         return cls(
             device_id=data["id"],
             name=data["name"],
@@ -125,6 +135,7 @@ class Device:
             enabled=data.get("enabled", True),
             settings=settings,
             calibration=calibration,
+            capture_template_id=capture_template_id,
             created_at=datetime.fromisoformat(data.get("created_at", datetime.utcnow().isoformat())),
             updated_at=datetime.fromisoformat(data.get("updated_at", datetime.utcnow().isoformat())),
         )
@@ -206,6 +217,7 @@ class DeviceStore:
         led_count: int,
         settings: Optional[ProcessingSettings] = None,
         calibration: Optional[CalibrationConfig] = None,
+        capture_template_id: str = "tpl_mss_default",
     ) -> Device:
         """Create a new device.
 
@@ -215,6 +227,7 @@ class DeviceStore:
             led_count: Number of LEDs
             settings: Processing settings
             calibration: Calibration configuration
+            capture_template_id: ID of assigned capture template
 
         Returns:
             Created device
@@ -233,6 +246,7 @@ class DeviceStore:
             led_count=led_count,
             settings=settings,
             calibration=calibration,
+            capture_template_id=capture_template_id,
         )
 
         # Store
@@ -270,6 +284,7 @@ class DeviceStore:
         enabled: Optional[bool] = None,
         settings: Optional[ProcessingSettings] = None,
         calibration: Optional[CalibrationConfig] = None,
+        capture_template_id: Optional[str] = None,
     ) -> Device:
         """Update device.
 
@@ -281,6 +296,7 @@ class DeviceStore:
             enabled: New enabled state (optional)
             settings: New settings (optional)
             calibration: New calibration (optional)
+            capture_template_id: New capture template ID (optional)
 
         Returns:
             Updated device
@@ -313,6 +329,8 @@ class DeviceStore:
                     f"does not match device LED count ({device.led_count})"
                 )
             device.calibration = calibration
+        if capture_template_id is not None:
+            device.capture_template_id = capture_template_id
 
         device.updated_at = datetime.utcnow()