stacklok / toolhive-studio / 25877573288

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fix(playground): persist agent selection on draft threads (#2258)

A new chat starts with a renderer-only draft thread whose row isn't
written until the first message. `setThreadAgent`'s
`UPDATE threads SET agent_id ...` therefore silently matched zero rows,
losing the picked agent on refetch.

Promote the draft via `ensureThreadExists` before writing the
assignment, and signal `threadStarted` when a new row is created so
the sidebar flips `pending: false`. Skip the ensure call when clearing
(`agentId: null`) to avoid materialising an empty row just to record
a no-op.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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