新增拉流转推功能，并按业务重设计摄像头/拉流独立界面

支持 RTMP/SRT/HLS/FLV/WHEP 拉流到 YouTube；摄像头与拉流页采用独立工作台布局，更新 README 文档。

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

web2_process_runtime.py

@@ -22,7 +22,7 @@ def normalize_log_text(text: str) -> str:
 
 def process_family(process_name: str) -> str:
     low = (process_name or "").strip().lower()
-    if low.startswith("camera") or low.startswith("douyin_youtube"):
+    if low.startswith("camera") or low.startswith("douyin_youtube") or low.startswith("pull_stream"):
         return "youtube"
     if low.startswith("youtube"):
         return "youtube"