Fix API directory listing: build paths relative to request, not workspace

dashboard/api.py

@@ -707,12 +707,14 @@ class TaskBoardHandler(SimpleHTTPRequestHandler):
                 try:
                     for item in sorted(target.iterdir()):
                         stat = item.stat()
+                        # Build relative path from original request path
+                        item_path = f"{path}/{item.name}" if path else item.name
                         items.append({
                             'name': item.name,
                             'type': 'dir' if item.is_dir() else 'file',
                             'size': stat.st_size if item.is_file() else None,
                             'mtime': stat.st_mtime,
-                            'path': str(item.relative_to(workspace))
+                            'path': item_path
                         })
                     self.send_json({
                         'type': 'dir',