fix:真实视频流还没接通，页面就会稳定显示“未实时获取真实值”

backend/monitoring/services.py

@@ -17,10 +17,7 @@ JPEG_FRAME_DIR = WORKSPACE_ROOT / "RobotDataShow" / "jpeg-frames"
 # GPS 数据 JSON 文件路径
 GEOSTREAM_JSON_PATH = WORKSPACE_ROOT / "GeoStream" / "gps_latest.json"
 GEOSTREAM_STALE_SECONDS = 15
-SAMPLE_CDATA_DIR = PROJECT_ROOT / "SampleCData"
-CONFIG_DIR = PROJECT_ROOT / "config"
-PRIMARY_OMNISOCKET_CONFIG_PATH = CONFIG_DIR / "omnisocket_demo.yaml"
-LEGACY_OMNISOCKET_CONFIG_PATH = SAMPLE_CDATA_DIR / "config" / "omnisocket_demo.yaml"
+OMNISOCKET_CONFIG_PATH = PROJECT_ROOT / "config" / "omnisocket_demo.yaml"
 VIDEO_SOURCE_MODE = os.getenv("VIDEO_SOURCE_MODE", "auto").strip().lower()
 OMNISOCKET_FRAME_FRESH_SECONDS = 2.0
 
@@ -29,12 +26,6 @@ def utc_iso_now() -> str:
     return datetime.now(UTC).isoformat(timespec="seconds").replace("+00:00", "Z")
 
 
-def resolve_omnisocket_config_path() -> Path:
-    if PRIMARY_OMNISOCKET_CONFIG_PATH.exists():
-        return PRIMARY_OMNISOCKET_CONFIG_PATH
-    return LEGACY_OMNISOCKET_CONFIG_PATH
-
-
 class OmniSocketVideoReceiver:
     def __init__(self) -> None:
         self._lock = threading.Lock()
@@ -64,7 +55,7 @@ class OmniSocketVideoReceiver:
         try:
             from omnisocket import MSG_TYPE_BINARY, Session, VIDEO_DEFAULTS  # type: ignore
         except ImportError:
-            python_dir = SAMPLE_CDATA_DIR / "python"
+            python_dir = WORKSPACE_ROOT / "OmniSocketGo" / "python"
             if python_dir.exists():
                 sys.path.insert(0, str(python_dir))
             from omnisocket import MSG_TYPE_BINARY, Session, VIDEO_DEFAULTS  # type: ignore
@@ -75,8 +66,6 @@ class OmniSocketVideoReceiver:
 
     def ensure_started(self) -> None:
         # 当第一次请求帧或状态时，再懒启动后台接收线程。
-        if VIDEO_SOURCE_MODE == "sample":
-            return
         if self._session_cls is None or self._binary_msg_type is None:
             return
 
@@ -96,17 +85,16 @@ class OmniSocketVideoReceiver:
         # transport + video_receiver。
         # 即使配置文件不存在，也允许回退到默认值继续运行。
         config: dict[str, Any] = {}
-        config_path = resolve_omnisocket_config_path()
-        if config_path.exists():
+        if OMNISOCKET_CONFIG_PATH.exists():
             try:
                 try:
                     import yaml  # type: ignore
 
-                    with config_path.open("r", encoding="utf-8") as file:
+                    with OMNISOCKET_CONFIG_PATH.open("r", encoding="utf-8") as file:
                         config = yaml.safe_load(file) or {}
                 except ImportError:
-                    # 如果当前环境没有 PyYAML，就用一个足够支撑当前 demo 配置的简化解析器。
-                    config = self._load_simple_yaml_config(config_path)
+                    # 当前配置文件结构非常简单，缺少 PyYAML 时用简化解析器兜底。
+                    config = self._load_simple_yaml_config(OMNISOCKET_CONFIG_PATH)
             except Exception as error:  # pragma: no cover - 可选依赖
                 self._last_error = f"config load failed: {error}"
 
@@ -247,7 +235,7 @@ class OmniSocketVideoReceiver:
                         continue
 
                     with self._lock:
-                        # 这里只保留最新的一张 JPEG 帧，供 Web 接口直接返回给前端。
+                        # 缓存：这里只保留最新的一张 JPEG 帧，供 Web 接口直接返回给前端。
                         self._latest_frame = jpeg_frame
                         self._latest_received_at = time.time()
                         self._latest_sequence = self._extract_sequence(frame)
@@ -277,7 +265,6 @@ class OmniSocketVideoReceiver:
     def get_status(self) -> dict[str, Any]:
         self.ensure_started()
         config = self._load_config()
-        config_path = resolve_omnisocket_config_path()
         transport_cfg = config.get("transport", {})
         video_cfg = config.get("video_receiver", {})
         with self._lock:
@@ -292,7 +279,7 @@ class OmniSocketVideoReceiver:
                 "frames_received": self._frames_received,
                 "latest_sequence": self._latest_sequence,
                 "last_error": self._last_error,
-                "config_path": str(config_path),
+                "config_path": str(OMNISOCKET_CONFIG_PATH),
                 "server_addr": str(transport_cfg.get("server_addr", "")),
                 "relay_via": str(transport_cfg.get("relay_via", "")),
                 "peer_id": str(video_cfg.get("peer_id", "")),
@@ -302,9 +289,6 @@ class OmniSocketVideoReceiver:
 
 class VideoFrameService:
     def __init__(self) -> None:
-        self._lock = threading.Lock()
-        self._frame_paths = sorted(JPEG_FRAME_DIR.glob("*.jpg"))
-        self._index = 0
         self._receiver = OmniSocketVideoReceiver()
 
     def get_status(self) -> dict[str, Any]:
@@ -323,31 +307,16 @@ class VideoFrameService:
                 "receiver": receiver_status,
             }
 
-        # 强制实时模式时，如果还没收到真实帧，就明确告诉前端“正在等待”，
-        # 不再悄悄回退到本地样例图，避免调试时误以为链路已接通。
-        if VIDEO_SOURCE_MODE == "omnisocket":
-            wait_detail = receiver_status["last_error"] or (
-                "等待 OmniSocket 实时 JPEG 帧，"
-                f"接收端 peer_id={receiver_status['peer_id']}，"
-                f"服务器={receiver_status['server_addr']}"
-            )
-            return {
-                "available": False,
-                "source_mode": "omnisocket-waiting",
-                "frame_count": receiver_status["frames_received"],
-                "fps": 30,
-                "frame_dir": str(JPEG_FRAME_DIR),
-                "source_detail": wait_detail,
-                "receiver": receiver_status,
-            }
-
+        wait_detail = receiver_status["last_error"] or (
+            "未实时获取真实值，请检查 OmniSocket 服务、视频发送端和接收配置。"
+        )
         return {
-            "available": bool(self._frame_paths),
-            "source_mode": "sample-jpeg-frame-loop" if self._frame_paths else "unavailable",
-            "frame_count": len(self._frame_paths),
+            "available": False,
+            "source_mode": "omnisocket-waiting",
+            "frame_count": receiver_status["frames_received"],
             "fps": 30,
             "frame_dir": str(JPEG_FRAME_DIR),
-            "source_detail": receiver_status["last_error"] or "fallback to local sample frames",
+            "source_detail": wait_detail,
             "receiver": receiver_status,
         }
 
@@ -357,23 +326,7 @@ class VideoFrameService:
         if receiver_frame is not None:
             return receiver_frame
 
-        # 强制实时模式下，如果还没收到真实帧，直接报错，
-        # 这样前端就能明确知道实时链路还没接通。
-        if VIDEO_SOURCE_MODE == "omnisocket":
-            raise RuntimeError(
-                "OmniSocket 实时 JPEG 帧暂未就绪，请检查 server_addr、peer_id、"
-                "target_peer，以及视频发送端是否已经启动。"
-            )
-
-        # 如果当前没有真实帧，就回退到本地演示 JPEG 文件，保证页面仍然可用。
-        if not self._frame_paths:
-            raise FileNotFoundError(f"No JPEG frames found in {JPEG_FRAME_DIR}")
-
-        with self._lock:
-            frame_path = self._frame_paths[self._index]
-            self._index = (self._index + 1) % len(self._frame_paths)
-
-        return frame_path.read_bytes()
+        raise RuntimeError("未实时获取真实值，当前没有可用的真实 JPEG 帧。")
 
     def iter_mjpeg(self, fps: float = 6.0) -> Iterator[bytes]:
         frame_interval = 1.0 / max(1.0, min(fps, 30.0))