workspace: use URLSearchParams for upload/delete

wwwroot/api/workspace_files.dspy

@@ -38,14 +38,18 @@ if not os.path.isdir(full_dir):
 
 upload_url = entire_url("/pipeline-sdlc/api/workspace_upload.dspy")
 
-# 拖拽上传脚本：读取文件 → base64 → POST → 刷新浏览器
+# 拖拽上传脚本：读取文件 → base64 → form-encoded POST → 刷新浏览器
 upload_script = (
     "var fs=event.params.files;"
     "if(!fs||!fs.length)return;"
     "for(var i=0;i<fs.length;i++){"
     "var f=fs[i].file;"
     "var b64=await new Promise(function(res){var r=new FileReader();r.onload=function(){res(r.result);};r.readAsDataURL(f);});"
-    "var resp=await fetch(" + _json.dumps(upload_url) + ",{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({id:" + _json.dumps(folder_id) + ",filename:f.name,filedata:b64})});"
+    "var body=new URLSearchParams();"
+    "body.append('id'," + _json.dumps(folder_id) + ");"
+    "body.append('filename',f.name);"
+    "body.append('filedata',b64);"
+    "var resp=await fetch(" + _json.dumps(upload_url) + ",{method:'POST',body:body});"
     "var rj=await resp.json();"
     "if(rj.status!='ok'){var m=new bricks.Message({title:'上传失败',message:rj.message||'未知错误'});m.open();}"
     "}"

wwwroot/api/workspace_popup.dspy

@@ -44,7 +44,9 @@ async with DBPools().sqlorContext(dbname) as sor:
         # 删除：删除选中文件并刷新
         delete_script = (
             "if(!bricks.app._ws_sel)return;"
-            "var resp=await fetch(" + _json.dumps(delete_url) + ",{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({id:bricks.app._ws_sel.id})});"
+            "var body=new URLSearchParams();"
+            "body.append('id',bricks.app._ws_sel.id);"
+            "var resp=await fetch(" + _json.dumps(delete_url) + ",{method:'POST',body:body});"
             "var rj=await resp.json();"
             "if(rj.status=='ok'){"
             "bricks.app._ws_sel=null;bricks.app._ws_sel_el=null;"