fix: 完善 RK3588 HDMI RX 信号检测与自动恢复

- 统一使用 QUERY_DV_TIMINGS 判断 HDMI RX 输入状态
  - 增加 source-following 设备状态 API 与前端只读展示
  - 支持长时间无信号后的 MJPEG/WebRTC 自动恢复
  - 修复模式切换时采集设备尚未释放导致的 EBUSY
  - 取消陈旧 WebRTC 重连并统一采集恢复策略
  - 移除视频输入状态区域的冗余标题

src/web/handlers/setup.rs

@@ -44,7 +44,7 @@ pub struct SetupRequest {
 
 pub async fn setup_init(
     State(state): State<Arc<AppState>>,
-    Json(req): Json<SetupRequest>,
+    Json(mut req): Json<SetupRequest>,
 ) -> Result<Json<LoginResponse>> {
     // Check if already initialized
     if state.config.is_initialized() {
@@ -65,6 +65,37 @@ pub async fn setup_init(
         ));
     }
 
+    if let Some(path) = req.video_device.as_deref() {
+        let source_following = state
+            .stream_manager
+            .list_devices()
+            .await
+            .ok()
+            .and_then(|devices| {
+                devices
+                    .into_iter()
+                    .find(|device| device.path.to_string_lossy() == path)
+            })
+            .is_some_and(|device| {
+                device.control_mode == crate::video::device::VideoControlMode::SourceFollowing
+            });
+        if source_following {
+            if req.video_format.is_some()
+                || req.video_width.is_some()
+                || req.video_height.is_some()
+                || req.video_fps.is_some()
+            {
+                tracing::debug!(
+                    "Ignoring setup-supplied format, resolution, and FPS for source-following video input"
+                );
+            }
+            req.video_format = None;
+            req.video_width = None;
+            req.video_height = None;
+            req.video_fps = None;
+        }
+    }
+
     let old_config = state.config.get();
 
     // Create single system user