Add Art-Net / sACN (E1.31) DMX device support

Full-stack implementation of DMX output for stage lighting and LED controllers:
- DMXClient with Art-Net and sACN packet builders, multi-universe splitting
- DMXDeviceProvider with manual_led_count capability and URL parsing
- Device store, API schemas, routes wired with dmx_protocol/start_universe/start_channel
- Frontend: add/settings modals with DMX fields, IconSelect protocol picker
- Fix add device modal dirty check on type change (re-snapshot after switch)
- i18n keys for DMX in en/ru/zh locales

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

server/src/wled_controller/storage/device_store.py

@@ -34,6 +34,10 @@ class Device:
         rgbw: bool = False,
         zone_mode: str = "combined",
         tags: List[str] = None,
+        # DMX (Art-Net / sACN) fields
+        dmx_protocol: str = "artnet",
+        dmx_start_universe: int = 0,
+        dmx_start_channel: int = 1,
         created_at: Optional[datetime] = None,
         updated_at: Optional[datetime] = None,
     ):
@@ -50,6 +54,9 @@ class Device:
         self.rgbw = rgbw
         self.zone_mode = zone_mode
         self.tags = tags or []
+        self.dmx_protocol = dmx_protocol
+        self.dmx_start_universe = dmx_start_universe
+        self.dmx_start_channel = dmx_start_channel
         self.created_at = created_at or datetime.now(timezone.utc)
         self.updated_at = updated_at or datetime.now(timezone.utc)
 
@@ -79,6 +86,12 @@ class Device:
             d["zone_mode"] = self.zone_mode
         if self.tags:
             d["tags"] = self.tags
+        if self.dmx_protocol != "artnet":
+            d["dmx_protocol"] = self.dmx_protocol
+        if self.dmx_start_universe != 0:
+            d["dmx_start_universe"] = self.dmx_start_universe
+        if self.dmx_start_channel != 1:
+            d["dmx_start_channel"] = self.dmx_start_channel
         return d
 
     @classmethod
@@ -98,6 +111,9 @@ class Device:
             rgbw=data.get("rgbw", False),
             zone_mode=data.get("zone_mode", "combined"),
             tags=data.get("tags", []),
+            dmx_protocol=data.get("dmx_protocol", "artnet"),
+            dmx_start_universe=data.get("dmx_start_universe", 0),
+            dmx_start_channel=data.get("dmx_start_channel", 1),
             created_at=datetime.fromisoformat(data.get("created_at", datetime.now(timezone.utc).isoformat())),
             updated_at=datetime.fromisoformat(data.get("updated_at", datetime.now(timezone.utc).isoformat())),
         )
@@ -183,6 +199,9 @@ class DeviceStore:
         rgbw: bool = False,
         zone_mode: str = "combined",
         tags: Optional[List[str]] = None,
+        dmx_protocol: str = "artnet",
+        dmx_start_universe: int = 0,
+        dmx_start_channel: int = 1,
     ) -> Device:
         """Create a new device."""
         device_id = f"device_{uuid.uuid4().hex[:8]}"
@@ -203,6 +222,9 @@ class DeviceStore:
             rgbw=rgbw,
             zone_mode=zone_mode,
             tags=tags or [],
+            dmx_protocol=dmx_protocol,
+            dmx_start_universe=dmx_start_universe,
+            dmx_start_channel=dmx_start_channel,
         )
 
         self._devices[device_id] = device
@@ -232,6 +254,9 @@ class DeviceStore:
         rgbw: Optional[bool] = None,
         zone_mode: Optional[str] = None,
         tags: Optional[List[str]] = None,
+        dmx_protocol: Optional[str] = None,
+        dmx_start_universe: Optional[int] = None,
+        dmx_start_channel: Optional[int] = None,
     ) -> Device:
         """Update device."""
         device = self._devices.get(device_id)
@@ -258,6 +283,12 @@ class DeviceStore:
             device.zone_mode = zone_mode
         if tags is not None:
             device.tags = tags
+        if dmx_protocol is not None:
+            device.dmx_protocol = dmx_protocol
+        if dmx_start_universe is not None:
+            device.dmx_start_universe = dmx_start_universe
+        if dmx_start_channel is not None:
+            device.dmx_start_channel = dmx_start_channel
 
         device.updated_at = datetime.now(timezone.utc)
         self.save()