ns = params_kw.copy()
kb_id = ns.get('kb_id', '')

result = {
    "widgettype": "VBox",
    "options": {"width": "100%", "padding": "0", "spacing": "16px"},
    "subwidgets": [
        {"widgettype": "Text", "options": {"text": "📤 上传文件", "cfontsize": 20, "fontWeight": "bold", "color": "#333"}},
        {
            "widgettype": "VBox",
            "options": {
                "id": "drop_zone",
                "width": "100%",
                "cheight": 12,
                "bgcolor": "#f8f9fa",
                "padding": "32px",
                "css": "card",
                "border": "2px dashed #3b82f6",
                "alignItems": "center",
                "justifyContent": "center"
            },
            "subwidgets": [
                {"widgettype": "Text", "options": {"text": "📂", "cfontsize": 40}},
                {"widgettype": "Text", "options": {"text": "点击选择文件上传", "cfontsize": 16, "color": "#555"}},
                {"widgettype": "Text", "options": {"text": "支持: TXT, PDF, JPG, PNG, MP3, WAV, MP4", "cfontsize": 12, "color": "#999"}},
                {"widgettype": "Button", "options": {"label": "选择文件", "bgcolor": "#3b82f6", "color": "#fff", "padding": "8px 20px", "marginTop": "12px"},
                 "binds": [{"wid": "self", "event": "click", "actiontype": "script",
                     "script": "var inp=document.createElement('input');inp.type='file';inp.onchange=function(e){var f=e.target.files[0];if(!f)return;var st=document.getElementById('status_text');if(st)st.innerText='上传中: '+f.name;var r=new XMLHttpRequest();r.open('POST','/api/doc/upload?kb_id=" + kb_id + "&file_name='+encodeURIComponent(f.name));r.onload=function(){if(st)st.innerText=r.status===200?'上传成功: '+f.name:'上传失败: HTTP '+r.status;location.reload()};r.send(f)};inp.click()"}]}
            ]
        },
        {
            "widgettype": "VBox",
            "options": {"id": "upload_status", "width": "100%", "padding": "12px", "bgcolor": "#f0fdf4", "border": "1px solid #86efac"},
            "subwidgets": [
                {"widgettype": "Text", "options": {"text": "⏳ 选择文件开始上传", "cfontsize": 13, "color": "#666", "id": "status_text"}}
            ]
        }
    ]
}
result