diff --git a/wwwroot/knowledge_bases_list/detail.ui b/wwwroot/knowledge_bases_list/detail.ui
index 5e89ad3..68c6702 100644
--- a/wwwroot/knowledge_bases_list/detail.ui
+++ b/wwwroot/knowledge_bases_list/detail.ui
@@ -76,8 +76,10 @@
                                     "binds": [{
                                         "wid": "self",
                                         "event": "click",
-                                        "actiontype": "script",
-                                        "script": "(function(){var s=document.createElement('script');s.text='document.addEventListener(\"dragover\",function(e){e.preventDefault();e.stopPropagation()});document.addEventListener(\"drop\",function(e){e.preventDefault();e.stopPropagation();var files=e.dataTransfer.files;if(!files.length)return;for(var i=0;i<files.length;i++){var f=files[i];var xhr=new XMLHttpRequest();var kb=\"{{params_kw.kb_id}}\";xhr.open(\"POST\",\"/api/doc/upload?kb_id=\"+kb+\"&file_name=\"+encodeURIComponent(f.name));xhr.onload=function(){if(xhr.status===200){location.reload()}};xhr.send(f)}}});var inp=document.createElement(\"input\");inp.type=\"file\";inp.multiple=true;inp.onchange=function(){for(var j=0;j<inp.files.length;j++){var f=inp.files[j];var xhr=new XMLHttpRequest();var kb=\"{{params_kw.kb_id}}\";xhr.open(\"POST\",\"/api/doc/upload?kb_id=\"+kb+\"&file_name=\"+encodeURIComponent(f.name));xhr.onload=function(){if(xhr.status===200){location.reload()}};xhr.send(f)}};inp.click()';document.body.appendChild(s)})()"
+                                        "actiontype": "urlwidget",
+                                        "target": "app.detail_content",
+                                        "mode": "replace",
+                                        "options": {"url": "{{entire_url('./upload.dspy')}}", "params": {"kb_id": "{{params_kw.kb_id}}"}}
                                     }]
                                 }
                             ]
diff --git a/wwwroot/knowledge_bases_list/upload.dspy b/wwwroot/knowledge_bases_list/upload.dspy
index fac70ce..f44eea5 100644
--- a/wwwroot/knowledge_bases_list/upload.dspy
+++ b/wwwroot/knowledge_bases_list/upload.dspy
@@ -1,26 +1,38 @@
 ns = params_kw.copy()
 kb_id = ns.get('kb_id', '')
 
-body = """{
+import json
+body = json.dumps({
     "widgettype": "VBox",
-    "options": {"width": "100%", "padding": "0", "spacing": "16px"},
+    "options": {"spacing": "16px", "padding": "0"},
     "subwidgets": [
-        {"widgettype": "Text", "options": {"text": "📤 上传文件", "cfontsize": 20, "fontWeight": "bold", "color": "#333"}},
+        {"widgettype": "Text", "options": {"text": "📤 上传文件", "cfontsize": 18, "fontWeight": "bold", "color": "#333"}},
+        {"widgettype": "Text", "options": {"text": "知识库: " + kb_id, "cfontsize": 12, "color": "#888"}},
         {
             "widgettype": "VBox",
-            "options": {
-                "id": "drop_zone", "width": "100%", "cheight": 12,
-                "bgcolor": "#f8f9fa", "padding": "32px", "css": "card",
-                "border": "2px dashed #3b82f6",
-                "alignItems": "center", "justifyContent": "center"
-            },
+            "options": {"id": "upload_zone", "width": "100%", "cheight": 10, "bgcolor": "#f8f9fa", "padding": "24px", "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": "Text", "options": {"text": "拖拽文件到此处上传", "cfontsize": 15, "color": "#888"}},
+                {"widgettype": "Text", "options": {"text": "支持: TXT,PDF,JPG,PNG,MP3,WAV,MP4", "cfontsize": 12, "color": "#aaa"}},
+                {
+                    "widgettype": "Button",
+                    "options": {"label": "选择文件上传", "bgcolor": "#3b82f6", "color": "#fff", "marginTop": "12px"},
+                    "binds": [{
+                        "wid": "self",
+                        "event": "click",
+                        "actiontype": "script",
+                        "script": "var i=document.createElement('input');i.type='file';i.onchange=function(){for(var j=0;j<i.files.length;j++){var f=i.files[j];var x=new XMLHttpRequest();x.open('POST','/api/doc/upload?kb_id=" + kb_id + "&file_name='+encodeURIComponent(f.name));x.send(f)}};i.click()"
+                    }]
+                },
+                {"widgettype": "Text", "options": {"text": "", "id": "upload_status", "cfontsize": 12, "color": "#50b86c", "marginTop": "8px"}}
             ]
+        },
+        {
+            "widgettype": "Button",
+            "options": {"label": "← 返回文件管理", "bgcolor": "#e0e0e0", "color": "#666"},
+            "binds": [{"wid": "self", "event": "click", "actiontype": "urlwidget", "target": "app.rag_main_content", "mode": "replace", "options": {"url": entire_url('/knowledge_bases_list/index.ui')}}]
         }
     ]
-}"""
-import json
+})
 return json.loads(body)
diff --git a/wwwroot/knowledge_bases_list/upload.js b/wwwroot/knowledge_bases_list/upload.js
new file mode 100644
index 0000000..4230d39
--- /dev/null
+++ b/wwwroot/knowledge_bases_list/upload.js
@@ -0,0 +1,26 @@
+// File drop upload handler - prevents browser default, uploads to API
+(function(){
+var kb_id = '{{params_kw.kb_id}}';
+document.addEventListener('dragover', function(e){ e.preventDefault(); e.stopPropagation(); });
+document.addEventListener('drop', function(e){
+    e.preventDefault(); e.stopPropagation();
+    var files = e.dataTransfer.files;
+    if (!files.length) return;
+    var st = document.getElementById('status_text');
+    if (st) st.innerHTML = '上传中...';
+    for (var i=0; i<files.length; i++){
+        (function(f){
+            var xhr = new XMLHttpRequest();
+            xhr.open('POST', '/api/doc/upload?kb_id='+kb_id+'&file_name='+encodeURIComponent(f.name));
+            xhr.onload = function(){
+                if (xhr.status === 200){
+                    if (st) st.innerHTML = '上传成功: '+f.name;
+                } else {
+                    if (st) st.innerHTML = '上传失败: HTTP '+xhr.status;
+                }
+            };
+            xhr.send(f);
+        })(files[i]);
+    }
+});
+})();