fix(chat): refresh read-only teammate thread metadata so preview finds the repo

[pedrofrxncx]

Summary

Opening someone else's thread showed "No source to preview / Connect GitHub" even though the thread had clearly loaded a repo and opened a PR — as the user put it, "it opened directly on the Super Agent, and the Super Agent has no github."

Root cause

load_repo correctly persists githubRepo (and sandboxMap) on the thread row's metadata. But a read-only viewer's panel row can predate that write:

• The live data-open-preview stream chunk that patches githubRepo/sandboxMap onto the client row reaches only the user who ran the tool.
• The decopilot.thread.status SSE carries no metadata (thread-status-events.ts), so handleWatchEvent never refreshes it.
• useEnsureTask prefers a cached localHit and fetchThread short-circuits on it, so the viewer's activeTask stays a pre-repo snapshot.

Result: preview-tab reads activeTask.metadata.githubRepo (absent) → empty state; and the owner-keyed sandbox lookup (from the read-only preview fix) finds no sandboxMap entry → no preview.

Fix

On opening a read-only teammate thread, force one fresh COLLECTION_THREADS_GET and merge it into the store via a new ThreadManagerStore.refreshThreadMetadata(id) — update-only (guards on the row already being loaded), so it can never insert a teammate's thread into the scoped panel list. activeTask then carries the current githubRepo + sandboxMap, fixing both the preview gate and the owner-sandbox preview.

• New hook useRefreshViewedThreadMetadata, gated to others' threads (created_by !== me). No-op for your own thread (kept current by the live stream).
• Fires once per (org, thread) (staleTime: Infinity).

Testing

• tsc --noEmit clean (apps/web).
• No useEffect (uses useQuery); query key is a KEYS constant.

Notes / follow-ups

• Ceiling (marked ponytail:): a teammate's thread that binds a repo while you're already watching it won't refresh until reload — add a finite staleTime/refetch if that matters.
• Secondary gap (not fixed here): for a repo-on-agent thread (repo on activeTask.virtual_mcp_id's agent metadata, opened read-only without ?virtualmcpid=), the preview resolves the URL's Super Agent and never the thread's own agent. Follow-up: resolve useVirtualMCP(activeTask.virtual_mcp_id) in the clonable-source check.

🤖 Generated with Claude Code

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Summary by cubic

Fixes missing repo preview when opening a teammate’s thread by force-refreshing thread metadata so githubRepo and sandboxMap are up to date. Prevents the “No source to preview / Connect GitHub” state and restores the owner’s sandbox preview.

• Bug Fixes
  • Added ThreadManagerStore.refreshThreadMetadata(id) to fetch and merge fresh metadata via COLLECTION_THREADS_GET (update-only).
  • Introduced useRefreshViewedThreadMetadata to trigger a one-time refresh for read-only teammate threads; no-op for your own.
  • Wired the hook into agent-shell-layout and added a KEYS.viewedThreadMetadataRefresh query key.

^{Written for commit 5c178c2. Summary will update on new commits.}