fix: bd sync fails to copy local changes TO beads-sync worktree (#810)

The bug: In a bare repo + worktrees setup, jsonlRelPath was calculated
relative to the project root (containing all worktrees), resulting in
paths like "main/.beads/issues.jsonl". But the sync branch worktree uses
sparse checkout for .beads/*, so files are at ".beads/issues.jsonl".

This caused SyncJSONLToWorktreeWithOptions to write to the wrong location
(e.g., worktree/main/.beads/ instead of worktree/.beads/), so changes
made locally never reached the sync branch worktree.

#785 fixed the reverse direction (worktree → local) by adding
normalizeBeadsRelPath(), but the local → worktree direction was missed.

Fix:
- Export NormalizeBeadsRelPath() (uppercase) for cross-package use
- Apply normalization in SyncJSONLToWorktreeWithOptions for dstPath
- Apply normalization in daemon_sync_branch.go for worktreeJSONLPath
  in both commit and pull paths
- Add unit tests for the normalization function

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cmd/bd/daemon_sync_branch.go

@@ -92,7 +92,9 @@ func syncBranchCommitAndPushWithOptions(ctx context.Context, store storage.Stora
 	}
 	
 	// Check for changes in worktree
-	worktreeJSONLPath := filepath.Join(worktreePath, jsonlRelPath)
+	// GH#810: Normalize path for bare repo worktrees
+	normalizedRelPath := git.NormalizeBeadsRelPath(jsonlRelPath)
+	worktreeJSONLPath := filepath.Join(worktreePath, normalizedRelPath)
 	hasChanges, err := gitHasChangesInWorktree(ctx, worktreePath, worktreeJSONLPath)
 	if err != nil {
 		return false, fmt.Errorf("failed to check for changes in worktree: %w", err)
@@ -304,7 +306,9 @@ func syncBranchPull(ctx context.Context, store storage.Storage, log daemonLogger
 	}
 	
 	// Copy JSONL back to main repo
-	worktreeJSONLPath := filepath.Join(worktreePath, jsonlRelPath)
+	// GH#810: Normalize path for bare repo worktrees
+	normalizedRelPath := git.NormalizeBeadsRelPath(jsonlRelPath)
+	worktreeJSONLPath := filepath.Join(worktreePath, normalizedRelPath)
 	mainJSONLPath := jsonlPath
 	
 	// Check if worktree JSONL exists