The error message 'path exists but is not a valid git worktree' was appearing
in daemon.log when the daemon attempted to use an existing worktree that was
in the git worktree list but had other issues (broken sparse checkout, etc.).
Root cause:
- CreateBeadsWorktree only checked isValidWorktree (is it in git worktree list)
- CheckWorktreeHealth was called separately and checked additional things
- If the worktree passed isValidWorktree but failed health check, an error
was logged and repair was attempted
Fix:
- CreateBeadsWorktree now performs a full health check when it finds an
existing worktree that's in the git worktree list
- If the health check fails, it automatically removes and recreates the
worktree
- Removed redundant CheckWorktreeHealth calls in daemon_sync_branch.go and
syncbranch/worktree.go since CreateBeadsWorktree now handles this internally
This eliminates the confusing error message and ensures worktrees are always
in a healthy state after CreateBeadsWorktree returns successfully.