Follow-up to the sync-delete fix: with the doc corruption gone, the remaining
in-session staleness class is the passive watch itself. It re-pulls only on
`touched` control frames, and the gateway debounces those 2s leading-edge
with NO trailing emit — a dropped frame (real across gateway/DO hops, nearly
impossible on localhost) leaves the MEMFS mirror pre-delete until an
unrelated later edit. Field symptom: "delete + sync doesn't delete, but
reloading the pcbnew tab and syncing again does".
The sync gesture always brings the pcbnew tab to the front first, so on
window focus / visibilitychange every live sibling watch now sends a manual
SyncStep1 (new gateway-only `YjsProvider.repull`), rate-limited to one per
2s; any news restages through the normal debounce.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MLPKYptXFrxHj5Gu7rhToz
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