5-pass log

1. Pass 1: Logged into PC and H5 portals. Confirmed account works and captured menu/manual structure.
2. Pass 2: Enumerated PC menu tree via /YSTemplet/GetMenu. Scanned 25 reachable pages and extracted page-local endpoints.
3. Pass 3: Logged into H5 via /Account/HLoginWay. Mapped alternate mobile pages and their endpoint surface.
4. Pass 4: Compared UI flows to the Yunshu manual and TCN onboarding docs. Marked what is explicit vs inferred.
5. Pass 5: Synthesized machine control verdict: no official API found, but many undocumented web endpoints likely act as an internal API.