Introduce a new global store slice for commit message generation to prevent
in-flight requests from being orphaned or lost when the Source Control
sidebar is unmounted or when switching between worktrees.
- Key commit generation records by worktree ID/path in the Zustand store
- Hydrate completed messages back into the draft input when returning to
the originating worktree without overwriting active user edits
- Ensure the agent-selection dialog state remains bound to the target
worktree that initiated the generation
- Wait for the PR composer eligibility check before hydrating completed
PR field generations on sidebar remounts
Jinjing
Neil