优化直播控制台：引入进程监控轻量轮询，并拆分 Live UI 组件

Co-authored-by: Cursor <cursoragent@cursor.com>

web2_process_runtime.py

@@ -183,9 +183,6 @@ def summarize_process_activity(
         elif family == "youtube" and has_ffmpeg_worker and _looks_like_ffmpeg_starting(tail) and log_recent:
             business_status = "relay_starting"
             business_note = "FFmpeg 已启动，尚未观察到视频进度"
-        elif log_age_seconds is not None and log_age_seconds > 180:
-            business_status = "stale"
-            business_note = f"进程在线但日志 {int(log_age_seconds)} 秒未更新"
         elif family == "youtube" and _has_any(
             tail,
             ("等待直播", "循环等待", "检测直播间中", "没有正在监测的直播", "无录制任务", "网址内容获取失败"),
@@ -198,6 +195,11 @@ def summarize_process_activity(
         ):
             business_status = "source_live"
             business_note = "源站已开播，但暂未检测到 FFmpeg 推流"
+        elif log_age_seconds is not None and log_age_seconds > 180 and (
+            has_ffmpeg_worker or has_recent_ffmpeg_progress or _looks_like_ffmpeg_progress(tail)
+        ):
+            business_status = "stale"
+            business_note = f"进程在线但日志 {int(log_age_seconds)} 秒未更新"
         elif "traceback" in tail or " error " in tail or "[error]" in tail or "错误信息" in tail:
             business_status = "error"
             business_note = "近期日志中出现异常"