Add docs/Mcp_RemoteControl_Design.md, the reference design for an
screenshot-driven AI remote-control feature: the existing get_screenshot for
observation plus remote_open/remote_close/remote_mouse/remote_keyboard for
input injection, reusing COMMAND_SCREEN_PREVIEW_REQ and COMMAND_SCREEN_CONTROL
+ MSG64. Coordinates are normalized (0..1) and mapped server-side to physical
pixels; injection runs over the screen sub-connection opened by
WebService::StartRemoteDesktop's hidden CScreenSpyDlg. Includes a
chat-on-behalf experiment case with clipboard-encoding and window-capture
notes.
Also fold in the get_audit_log encoding correction for
docs/Mcp_Terminal_Design.md, so the two doc changes ship as one commit.
Co-Authored-By: deepseek-v4-pro
