fix: change agent model to single

src/pages/AgentEditor/components/ModelSelectDropdown.tsx

@@ -1,19 +1,21 @@
 import { useState } from 'react';
-import { Button, Checkbox, Dropdown } from 'antd';
+import { Button, Radio, Dropdown } from 'antd';
 import { DownOutlined } from '@ant-design/icons';
 import { AiModel } from '../../../api';
 import { DEFAULT_RH_40X40_GRAY } from '../../../constants';
 
-interface ModelCheckboxDropdownProps {
-  value?: string[];
-  onChange?: (value: string[]) => void;
+interface ModelSelectDropdownProps {
+  value?: string;
+  onChange?: (value: string) => void;
   models: AiModel[];
   isMobile?: boolean;
 }
 
-export default function ModelCheckboxDropdown({ value = [], onChange, models, isMobile = false }: ModelCheckboxDropdownProps) {
+export default function ModelSelectDropdown({ value, onChange, models, isMobile = false }: ModelSelectDropdownProps) {
   const [open, setOpen] = useState(false);
-  const summary = value.length ? `${value.length} 个已选` : '选择模型';
+  
+  const selectedModel = models.find(m => m.id === value);
+  const summary = selectedModel ? selectedModel.model_name : '选择模型';
 
   return (
     <Dropdown
@@ -22,43 +24,44 @@ export default function ModelCheckboxDropdown({ value = [], onChange, models, is
       onOpenChange={setOpen}
       popupRender={() => (
         <div className={`agent-model-dropdown-panel${isMobile ? ' is-h5-panel' : ''}`} onClick={(e) => e.stopPropagation()}>
-          <Checkbox.Group
+          <Radio.Group
             value={value}
-            onChange={(checked) => onChange?.(checked.map((item) => String(item)))}
-            className="agent-model-checkbox-group"
+            onChange={(e) => {
+              onChange?.(e.target.value);
+              setOpen(false); // 单选选中后自动关闭
+            }}
+            className="agent-model-radio-group"
           >
             {models.map((m) => {
               const inputPrice = 2 * m.model_ratio;
               const outputPrice = inputPrice * m.completion_ratio;
               return (
-                <Checkbox key={m.id} value={m.id} className="agent-model-checkbox-item">
-                  <div className="agent-model-checkbox-content">
-                    <div className="agent-model-checkbox-meta">
+                <Radio key={m.id} value={m.id} className="agent-model-radio-item">
+                  <div className="agent-model-radio-content">
+                    <div className="agent-model-radio-meta">
                       <img
                         src={m.icon || DEFAULT_RH_40X40_GRAY}
                         alt={m.model_name}
-                        className="agent-model-checkbox-icon"
+                        className="agent-model-radio-icon"
                       />
-                      <span className="agent-model-checkbox-name">{m.model_name}</span>
+                      <span className="agent-model-radio-name">{m.model_name}</span>
                     </div>
-                    <div className="agent-model-checkbox-price">
+                    <div className="agent-model-radio-price">
                       <span>输入: ${inputPrice.toFixed(2)}/M</span>
                       <span>输出: ${outputPrice.toFixed(2)}/M</span>
                     </div>
                   </div>
-                </Checkbox>
+                </Radio>
               );
             })}
-          </Checkbox.Group>
+          </Radio.Group>
         </div>
       )}
     >
       <Button type="text" block className="agent-model-dropdown-trigger">
-        <span className="agent-model-dropdown-summary">{summary}</span>
+        <span className="agent-model-dropdown-summary">模型选择</span>
         <span className="agent-model-dropdown-values">
-          {value.length 
-            ? value.map(id => models.find(m => m.id === id)?.model_name || id).join(', ') 
-            : '未选择'}
+          {summary}
         </span>
         <DownOutlined className="agent-model-dropdown-arrow" />
       </Button>

src/pages/AgentEditor/components/capability/ModelSettingsCard.tsx

@@ -1,7 +1,7 @@
 import { Form, InputNumber } from 'antd';
 import { SettingOutlined } from '@ant-design/icons';
 import { parseModelSelections } from '../../constants';
-import ModelCheckboxDropdown from '../ModelCheckboxDropdown';
+import ModelSelectDropdown from '../ModelSelectDropdown';
 
 interface ModelSettingsCardProps {
   models: any[];
@@ -22,17 +22,18 @@ export default function ModelSettingsCard({ models, isMobile = false }: ModelSet
           required
           rules={[
             {
-              validator: async (_rule, value) => {
-                const selected = parseModelSelections(value);
-                if (selected.length > 0) return;
-                throw new Error('请选择至少一个模型');
-              },
+              required: true,
+              message: '请选择一个模型',
             },
           ]}
           className="mb-0"
-          getValueProps={(value) => ({ value: parseModelSelections(value) })}
+          getValueProps={(value) => {
+            // 如果后端返回的是数组或 JSON 字符串，取第一个作为单选值
+            const selected = parseModelSelections(value);
+            return { value: selected[0] || '' };
+          }}
         >
-          <ModelCheckboxDropdown models={models} isMobile={isMobile} />
+          <ModelSelectDropdown models={models} isMobile={isMobile} />
         </Form.Item>
         <Form.Item name="temperature" label="Temperature" className="mb-0" hidden>
           <div className="flex items-center gap-4">

src/styles.css

@@ -946,14 +946,16 @@ body {
   }
 }
 
-.agent-model-checkbox-group {
+.agent-model-checkbox-group,
+.agent-model-radio-group {
   display: flex;
   flex-direction: column;
   gap: 10px;
   width: 100%;
 }
 
-.agent-model-checkbox-item {
+.agent-model-checkbox-item,
+.agent-model-radio-item {
   display: flex;
   align-items: flex-start;
   margin-inline-start: 0;
@@ -963,15 +965,52 @@ body {
   background: var(--color-surface);
 }
 
-.agent-model-checkbox-item .ant-checkbox {
+.agent-model-checkbox-item .ant-checkbox,
+.agent-model-radio-item .ant-radio {
   margin-top: 3px;
 }
 
-.agent-model-checkbox-item .ant-checkbox + span {
+.agent-model-checkbox-item .ant-checkbox + span,
+.agent-model-radio-item .ant-radio + span {
   width: 100%;
   padding-inline-start: 10px;
 }
 
+.agent-model-radio-content {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  width: 100%;
+}
+
+.agent-model-radio-meta {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  min-width: 0;
+  flex: 1;
+}
+
+.agent-model-radio-name {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  font-weight: 500;
+  color: var(--color-text);
+}
+
+.agent-model-radio-price {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-end;
+  justify-content: center;
+  flex-shrink: 0;
+  margin-left: 8px;
+  font-size: 10px;
+  color: var(--color-text-tertiary);
+}
+
 .agent-model-checkbox-content {
   display: flex;
   align-items: center;
@@ -988,7 +1027,7 @@ body {
   flex: 1;
 }
 
-.agent-model-checkbox-icon {
+.agent-model-radio-icon {
   width: 20px;
   height: 20px;
   object-fit: contain;