workspace: tree dirs only, left 280px, right filler

wwwroot/api/workspace_popup.dspy

@@ -42,7 +42,7 @@ async with DBPools().sqlorContext(dbname) as sor:
                 "subwidgets": [
                     {
                         "widgettype": "VBox",
-                        "options": {"width": "30%"},
+                        "options": {"width": "280px"},
                         "subwidgets": [{
                             "widgettype": "Tree",
                             "id": "ws_tree",

wwwroot/api/workspace_tree.dspy

@@ -1,4 +1,4 @@
-# workspace_tree.dspy - 返回 Tree widget 需要的 {id, parentid, label, path} 格式
+# workspace_tree.dspy - 只返回目录树，不含文件
 
 uid = await get_user()
 if not uid:
@@ -28,7 +28,6 @@ async with DBPools().sqlorContext(dbname) as sor:
 if not ws_dir or not os.path.isdir(ws_dir):
     return [{"id": "__root__", "parentid": "", "label": "📁 工作空间（不可用）", "path": ""}]
 
-# 递归扫描目录，id 只含相对路径，full path 存 path 字段
 items = [{"id": "__root__", "parentid": "", "label": "📁 " + os.path.basename(ws_dir), "path": ws_dir, "is_leaf": False}]
 
 def scan_dir(path, parent_id, rel_prefix):
@@ -40,8 +39,8 @@ def scan_dir(path, parent_id, rel_prefix):
         full = os.path.join(path, name)
         if name.startswith('.') or name == '__pycache__':
             continue
-        rel_path = rel_prefix + '/' + name if rel_prefix else name
         if os.path.isdir(full):
+            rel_path = rel_prefix + '/' + name if rel_prefix else name
             items.append({
                 "id": rel_path,
                 "parentid": parent_id,
@@ -50,14 +49,6 @@ def scan_dir(path, parent_id, rel_prefix):
                 "is_leaf": False
             })
             scan_dir(full, rel_path, rel_path)
-        else:
-            items.append({
-                "id": rel_path,
-                "parentid": parent_id,
-                "label": "📄 " + name,
-                "path": full,
-                "is_leaf": True
-            })
 
 scan_dir(ws_dir, "__root__", "")
 return items