diff --git a/wwwroot/agent_input.js b/wwwroot/agent_input.js
index 4672922..8d1ac67 100644
--- a/wwwroot/agent_input.js
+++ b/wwwroot/agent_input.js
@@ -1,5 +1,5 @@
 // AgentInput — 集成模型选择的输入控件
-// options: { model_dataurl, placeholder, url(提交图标), ...TextFiles 原有属性 }
+// options: { model_dataurl, model_cwidth, placeholder, url(提交图标), ...VBox 原有属性 }
 // event: inputed → { prompt, add_files, model_id }
 
 bricks.AgentInput = class extends bricks.VBox {
@@ -17,25 +17,18 @@ bricks.AgentInput = class extends bricks.VBox {
         // text input
         this.textw = new bricks.UiText({
             name: 'prompt',
-            placeholder: opts.placeholder || '输入你的需求...'
+            placeholder: opts.placeholder || ''
         });
 
-        // model selector (UiCode dropdown)
-        this.model_selector = new bricks.Form({
-            name: 'model_selector',
-            cols: 1,
-            cwidth: opts.model_cwidth || 14,
-            fields: [{
-                name: 'model_id',
-                uitype: 'code',
-                label: '',
-                placeholder: '选择模型',
-                cwidth: 12,
-                dataurl: opts.model_dataurl || '',
-                valueField: 'model_id',
-                textField: 'model_id_text',
-                params: { valueField: 'model_id', textField: 'model_id_text' }
-            }]
+        // model selector — 直接用 UiCode，不用 Form
+        this.model_selector = new bricks.UiCode({
+            name: 'model_id',
+            valueField: 'model_id',
+            textField: 'model_id_text',
+            dataurl: opts.model_dataurl || '',
+            params: opts.model_params || {},
+            cwidth: opts.model_cwidth || 12,
+            cfontsize: 0.85
         });
 
         // add file button
@@ -52,7 +45,7 @@ bricks.AgentInput = class extends bricks.VBox {
         });
         inputw.bind('click', this.input_finished.bind(this));
 
-        // button row: [add_file] [model_selector] [filler] [submit]
+        // button row: [+add] [model_selector] [filler] [submit]
         var hbox = new bricks.HBox({cheight: 1.5, gap: '4px', alignItems: 'center'});
         hbox.add_widget(addfilew);
         hbox.add_widget(this.model_selector);
@@ -73,11 +66,10 @@ bricks.AgentInput = class extends bricks.VBox {
         var txt = this.textw.getValue();
         if (!txt.prompt || txt.prompt.length < 1) return;
         var p = this.params || {};
-        var mv = this.model_selector.getValue() || {};
         var d = Object.assign({}, p, {
             add_files: this.add_files,
             prompt: txt.prompt,
-            model_id: mv.model_id || ''
+            model_id: this.model_selector.getValue() || ''
         });
         this.dispatch('inputed', d);
         this.textw.setValue('');
@@ -106,10 +98,9 @@ bricks.AgentInput = class extends bricks.VBox {
     }
 
     getValue() {
-        var mv = this.model_selector.getValue() || {};
         return {
             prompt: (this.textw.getValue() || {}).prompt || '',
-            model_id: mv.model_id || ''
+            model_id: this.model_selector.getValue() || ''
         };
     }
 };