When connecting to a separate GA source (design A), the bridge and the
served frontend come from that 本体 — so an older 本体 showed an old
desktop UI. set_ga_source now pushes this shell's own (new) desktop
files into the 本体 before restarting the bridge, so it serves the new
UI + bridge while keeping the 本体 agent/data.
- copy_dir_all + sync_desktop_files: back up 本体 originals into
temp/desktop_sync_backup_<ts>/, then copy the shell version over
- synced set: frontends/desktop/static/, desktop_bridge.py,
plan_state.py, cost_tracker.py (NOT src-tauri / build artifacts)
- skipped when the source is the shell's own code location (dev tree)
yiqi-017
da5fbef965
