feat: 扩展 Model 设置功能

- 添加 Embedding 模型类型支持
- 优化模型设置表单样式

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/views/Settings.vue

@@ -476,7 +476,7 @@ const saveStorageSettings = () => {
                   {{ model.model }}
                 </td>
                 <td class="text-center">
-                  <span class="model-type-tag">{{ model.model_type }}</span>
+                  <span class="model-type-tag" :class="model.model_type">{{ model.model_type }}</span>
                 </td>
                 <td class="text-center text-sm">
                   {{ model.base_url }}

web/src/views/settings/modelSettings.css

@@ -65,14 +65,33 @@
 
 /* Model Type 标签 */
 .model-type-tag {
-  background-color: rgba(249, 115, 22, 0.2);
-  color: #f97316;
   padding: 4px 8px;
   border-radius: 4px;
   font-size: 14px;
   text-transform: capitalize;
 }
 
+/* 不同类型的不同颜色 */
+.model-type-tag.chat {
+  background-color: rgba(59, 130, 246, 0.2);
+  color: #3b82f6;
+}
+
+.model-type-tag.embedding {
+  background-color: rgba(34, 197, 94, 0.2);
+  color: #22c55e;
+}
+
+.model-type-tag.rerank {
+  background-color: rgba(168, 85, 247, 0.2);
+  color: #a855f7;
+}
+
+.model-type-tag.vlm {
+  background-color: rgba(249, 115, 22, 0.2);
+  color: #f97316;
+}
+
 /* 操作按钮 */
 .btn-icon {
   padding: 6px;

web/src/views/settings/useModelSettings.ts

@@ -27,6 +27,8 @@ export function useModelSettings() {
 
   // 默认 Base URL 映射
   const defaultBaseUrls: Record<string, string> = {
+    OpenAI: 'http://localhost:1234/v1',
+    Ollama: 'http://localhost:11434',
     ali: 'https://dashscope.aliyuncs.com/compatible-mode/v1',
   }
 
@@ -120,6 +122,7 @@ export function useModelSettings() {
         body: JSON.stringify({
           provider: newModelForm.value.provider,
           model: newModelForm.value.model,
+          model_type: newModelForm.value.modelType || 'chat',
           api_key: newModelForm.value.apiKey,
           base_url: newModelForm.value.baseUrl,
           api_endpoint: newModelForm.value.apiEndpoint,