* feat(sidebar): inline-edit session display name via hover pencil
Reuse the merged PATCH /sessions/{id} rename endpoint (#2302). A pencil
reveals on session-row hover/focus; clicking it swaps the label for an
inline input capped at 20 chars (same as spawn --name). Enter/blur saves
and invalidates the workspace query so the rename survives reload; Escape
cancels.
Refs #2301
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* test(sidebar): cover inline session rename save/cancel/cap
Refs #2301
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* chore: format with prettier [skip ci]
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Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
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