tree: root only initially, click to expand

wwwroot/api/workspace_tree.dspy

@@ -1,4 +1,4 @@
-# workspace_tree.dspy - 初始加载返回嵌套结构（根节点+children），展开时返回平级子节点
+# workspace_tree.dspy - 初始只返回根节点（无children），靠点击展开
 
 import os
 
@@ -30,43 +30,18 @@ async with DBPools().sqlorContext(dbname) as sor:
 
 if not ws_dir or not os.path.isdir(ws_dir):
     if not node_id:
-        return [{
+        return [{"id": "__root__", "parentid": "", "label": "📁 工作空间（不可用）", "path": ws_dir, "is_leaf": False}]
-            "id": "__root__",
-            "parentid": "",
-            "label": "📁 工作空间（不可用）",
-            "path": ws_dir,
-            "is_leaf": True
-        }]
     return []
 
-# 初始加载：返回带 children 的嵌套结构
+# 初始加载：只返回根节点
 if not node_id:
-    root = {
+    return [{
         "id": "__root__",
         "parentid": "",
         "label": "📁 " + os.path.basename(ws_dir),
         "path": ws_dir,
-        "is_leaf": False,
+        "is_leaf": False
-        "children": []
+    }]
-    }
-    try:
-        entries = sorted(os.listdir(ws_dir))
-    except Exception:
-        entries = []
-    for name in entries:
-        full = os.path.join(ws_dir, name)
-        if name.startswith('.') or name == '__pycache__':
-            continue
-        if os.path.isdir(full):
-            root["children"].append({
-                "id": name,
-                "parentid": "__root__",
-                "label": "📁 " + name,
-                "path": full,
-                "is_leaf": False,
-                "children": []
-            })
-    return [root]
 
 # 展开节点
 scan_path = ws_dir + '/' + node_id