Two related fixes for the case where the canvas thinks workspaces are
stuck provisioning when they're actually online:
1. ProvisioningTimeout banners now gate on wsStatus === "connected".
While the WS is in connecting/disconnected state, the local
"provisioning" status reflects the last event received before the
drop — workspaces may have transitioned to online minutes ago. The
8m timeout was firing against frozen state and showing a wall of
yellow warnings on already-online workspaces.
2. Socket layer now starts a 10s rehydrate poll when the WS goes
unhealthy (onclose) and stops it on onopen/disconnect. The
reconnect attempts continue in parallel; whichever recovers first
wins. rehydrate()'s existing dedup gate prevents the open-time
rehydrate from racing with a fallback poll. Without this the
store could stay frozen for minutes while WS exponential backoff
chewed through retries.
Plus the previously-uncommitted TemplatePalette flushSync change so
the import modal unmounts synchronously before doImport runs (otherwise
React batches the close with the import's setState prefix and the
modal backdrop hides the spawn animation).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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