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_supervisor.py

@@ -10,6 +10,7 @@ import os
 import re
 import shutil
 import sys
+import time
 from pathlib import Path
 from typing import Any, Callable, Optional
 
@@ -26,6 +27,37 @@ def strip_ansi_codes(text: str) -> str:
     return re.sub(r"\x1b\[[0-9;]*m", "", text)
 
 
+def _looks_like_null_device(path: str | Path | None) -> bool:
+    if not path:
+        return True
+    norm = str(path).replace("\\", "/").lower()
+    return "/dev/null" in norm or norm.endswith("/nul") or norm == "nul"
+
+
+def _truncate_text_log(path: str | Path | None) -> None:
+    """对齐 sh2：每次 start 清空日志，避免旧 mtime 触发 stale/心跳过期。"""
+    if _looks_like_null_device(path):
+        return
+    log_path = Path(str(path))
+    try:
+        log_path.parent.mkdir(parents=True, exist_ok=True)
+        with log_path.open("w", encoding="utf-8", errors="ignore"):
+            pass
+    except OSError:
+        pass
+
+
+def _child_env_for_process(process_name: str) -> dict[str, str]:
+    extra: dict[str, str] = {
+        "LIVE_PM2_PROCESS_NAME": process_name,
+        "PYTHONUNBUFFERED": "1",
+        "PYTHONIOENCODING": "utf-8",
+    }
+    if process_name.startswith("youtube2__"):
+        extra["RELAY_CHANNEL_ID"] = process_name[len("youtube2__") :]
+    return merge_child_env(extra)
+
+
 class BuiltinSupervisor:
     """用本地 PID + 日志文件管理子进程，不依赖 Node/PM2。"""
 
@@ -107,11 +139,10 @@ class BuiltinSupervisor:
 
             out_p, err_p = self._log_paths(process_name)
             out_p.parent.mkdir(parents=True, exist_ok=True)
-            out_f = open(out_p, "ab")
-            err_f = open(err_p, "ab")
-            extra: dict[str, str] = {}
-            if process_name.startswith("youtube2__"):
-                extra["RELAY_CHANNEL_ID"] = process_name[len("youtube2__") :]
+            _truncate_text_log(out_p)
+            _truncate_text_log(err_p)
+            out_f = open(out_p, "a", encoding="utf-8", errors="ignore")
+            err_f = open(err_p, "a", encoding="utf-8", errors="ignore")
             try:
                 proc = await asyncio.create_subprocess_exec(
                     *argv,
@@ -119,7 +150,7 @@ class BuiltinSupervisor:
                     stdout=out_f,
                     stderr=err_f,
                     creationflags=0,
-                    env=merge_child_env(extra),
+                    env=_child_env_for_process(process_name),
                 )
             except Exception as e:
                 out_f.close()
@@ -134,6 +165,7 @@ class BuiltinSupervisor:
                 "script": script,
                 "out_log": str(out_p),
                 "err_log": str(err_p),
+                "started_at": time.strftime("%Y-%m-%dT%H:%M:%S"),
             }
             self._write_state(state)
             return f"已启动 {script}（PID {pid}），日志见 .pm2/logs"