Add per-target protocol selection (DDP/HTTP) and reorganize target editor

- Add protocol field (ddp/http) to storage, API schemas, routes, processor
- WledTargetProcessor passes protocol to create_led_client(use_ddp=...)
- Target editor: protocol dropdown + keepalive in collapsible Specific Settings
- FPS, brightness threshold, adaptive FPS moved to main form area
- Hide Specific Settings section for serial devices (protocol is WLED-only)
- Card badge: show DDP/HTTP for WLED devices, Serial for serial devices

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

server/src/wled_controller/storage/picture_target_store.py

@@ -101,6 +101,7 @@ class PictureTargetStore:
         state_check_interval: int = DEFAULT_STATE_CHECK_INTERVAL,
         min_brightness_threshold: int = 0,
         adaptive_fps: bool = False,
+        protocol: str = "ddp",
         key_colors_settings: Optional[KeyColorsSettings] = None,
         description: Optional[str] = None,
         picture_source_id: str = "",
@@ -135,6 +136,7 @@ class PictureTargetStore:
                 state_check_interval=state_check_interval,
                 min_brightness_threshold=min_brightness_threshold,
                 adaptive_fps=adaptive_fps,
+                protocol=protocol,
                 description=description,
                 auto_start=auto_start,
                 created_at=now,
@@ -173,6 +175,7 @@ class PictureTargetStore:
         state_check_interval: Optional[int] = None,
         min_brightness_threshold: Optional[int] = None,
         adaptive_fps: Optional[bool] = None,
+        protocol: Optional[str] = None,
         key_colors_settings: Optional[KeyColorsSettings] = None,
         description: Optional[str] = None,
         auto_start: Optional[bool] = None,
@@ -203,6 +206,7 @@ class PictureTargetStore:
             state_check_interval=state_check_interval,
             min_brightness_threshold=min_brightness_threshold,
             adaptive_fps=adaptive_fps,
+            protocol=protocol,
             key_colors_settings=key_colors_settings,
             description=description,
             auto_start=auto_start,

server/src/wled_controller/storage/wled_picture_target.py

@@ -21,6 +21,7 @@ class WledPictureTarget(PictureTarget):
     state_check_interval: int = DEFAULT_STATE_CHECK_INTERVAL
     min_brightness_threshold: int = 0  # brightness below this → 0 (disabled when 0)
     adaptive_fps: bool = False          # auto-reduce FPS when device is unresponsive
+    protocol: str = "ddp"               # "ddp" (UDP) or "http" (JSON API)
 
     def register_with_manager(self, manager) -> None:
         """Register this WLED target with the processor manager."""
@@ -35,6 +36,7 @@ class WledPictureTarget(PictureTarget):
                 brightness_value_source_id=self.brightness_value_source_id,
                 min_brightness_threshold=self.min_brightness_threshold,
                 adaptive_fps=self.adaptive_fps,
+                protocol=self.protocol,
             )
 
     def sync_with_manager(self, manager, *, settings_changed: bool,
@@ -60,7 +62,7 @@ class WledPictureTarget(PictureTarget):
     def update_fields(self, *, name=None, device_id=None, color_strip_source_id=None,
                       brightness_value_source_id=None,
                       fps=None, keepalive_interval=None, state_check_interval=None,
-                      min_brightness_threshold=None, adaptive_fps=None,
+                      min_brightness_threshold=None, adaptive_fps=None, protocol=None,
                       description=None, auto_start=None, **_kwargs) -> None:
         """Apply mutable field updates for WLED targets."""
         super().update_fields(name=name, description=description, auto_start=auto_start)
@@ -80,6 +82,8 @@ class WledPictureTarget(PictureTarget):
             self.min_brightness_threshold = min_brightness_threshold
         if adaptive_fps is not None:
             self.adaptive_fps = adaptive_fps
+        if protocol is not None:
+            self.protocol = protocol
 
     @property
     def has_picture_source(self) -> bool:
@@ -96,6 +100,7 @@ class WledPictureTarget(PictureTarget):
         d["state_check_interval"] = self.state_check_interval
         d["min_brightness_threshold"] = self.min_brightness_threshold
         d["adaptive_fps"] = self.adaptive_fps
+        d["protocol"] = self.protocol
         return d
 
     @classmethod
@@ -123,6 +128,7 @@ class WledPictureTarget(PictureTarget):
             state_check_interval=data.get("state_check_interval", DEFAULT_STATE_CHECK_INTERVAL),
             min_brightness_threshold=data.get("min_brightness_threshold", 0),
             adaptive_fps=data.get("adaptive_fps", False),
+            protocol=data.get("protocol", "ddp"),
             description=data.get("description"),
             auto_start=data.get("auto_start", False),
             created_at=datetime.fromisoformat(data.get("created_at", datetime.utcnow().isoformat())),