workspace: button script handles tree bind, popup no binds

wwwroot/api/workspace_popup.dspy

@@ -1,4 +1,4 @@
-# workspace_popup.dspy - 返回工作空间 PopupWindow
+# workspace_popup.dspy - 返回工作空间 PopupWindow（binds 由按钮脚本处理）
 
 uid = await get_user()
 if not uid:
@@ -28,7 +28,6 @@ async with DBPools().sqlorContext(dbname) as sor:
             }]
         }
     else:
-        files_url = entire_url("/pipeline-sdlc/api/workspace_files.dspy")
         resp = {
             "widgettype": "PopupWindow",
             "options": {
@@ -62,20 +61,12 @@ async with DBPools().sqlorContext(dbname) as sor:
                         "widgettype": "VScrollPanel",
                         "id": "ws_files",
                         "options": {
-                            "dataurl": files_url + "?id=__root__",
                             "css": "filler",
                             "padding": "8px",
                             "gap": "4px"
                         }
                     }
                 ]
-            }],
-            "binds": [{
-                "wid": "ws_tree",
-                "event": "selected",
-                "actiontype": "script",
-                "target": "self",
-                "script": f"console.log('BIND FIRED');var tree=bricks.getWidgetById('ws_tree',bricks.app);if(!tree){{console.log('no tree');return;}}var nid=tree.selected_node.user_data.id;console.log('nid='+nid);var fp=bricks.getWidgetById('ws_files',bricks.app);if(fp){{fetch('{files_url}?id='+encodeURIComponent(nid)).then(function(r){{return r.json()}}).then(function(d){{console.log('loaded type='+d.widgettype);fp.dom_element.innerHTML='';bricks.widgetBuild(d,fp);console.log('ws_files innerHTML='+fp.dom_element.innerHTML.length);}});}}else{{console.log('no fp');}}"
             }]
         }