Add ASR interim results support in Assistant model and API

- Introduced `asr_interim_enabled` field in the Assistant model to control interim ASR results.
- Updated AssistantBase and AssistantUpdate schemas to include the new field.
- Modified the database schema to add the `asr_interim_enabled` column.
- Enhanced runtime metadata to reflect interim ASR settings.
- Updated API endpoints and tests to validate the new functionality.
- Adjusted documentation to include details about interim ASR results configuration.

web/pages/Assistants.tsx

@@ -259,6 +259,7 @@ export const AssistantsPage: React.FC = () => {
       speed: 1,
       hotwords: [],
       tools: [],
+      asrInterimEnabled: false,
       botCannotBeInterrupted: false,
       interruptionSensitivity: 180,
       configMode: 'platform',
@@ -1358,6 +1359,41 @@ export const AssistantsPage: React.FC = () => {
                                     </p>
                                 </div>
 
+                                <div className="space-y-3">
+                                    <div className="flex items-center justify-between gap-3">
+                                        <label className="text-sm font-medium text-white flex items-center">
+                                            <Mic className="w-4 h-4 mr-2 text-primary"/> 离线 ASR 中间结果
+                                        </label>
+                                        <div className="inline-flex rounded-lg border border-white/10 bg-white/5 p-1">
+                                            <button
+                                              type="button"
+                                              onClick={() => updateAssistant('asrInterimEnabled', false)}
+                                              className={`px-3 py-1 text-xs rounded-md transition-colors ${
+                                                selectedAssistant.asrInterimEnabled === true
+                                                  ? 'text-muted-foreground hover:text-foreground'
+                                                  : 'bg-primary text-primary-foreground shadow-sm'
+                                              }`}
+                                            >
+                                              关闭
+                                            </button>
+                                            <button
+                                              type="button"
+                                              onClick={() => updateAssistant('asrInterimEnabled', true)}
+                                              className={`px-3 py-1 text-xs rounded-md transition-colors ${
+                                                selectedAssistant.asrInterimEnabled === true
+                                                  ? 'bg-primary text-primary-foreground shadow-sm'
+                                                  : 'text-muted-foreground hover:text-foreground'
+                                              }`}
+                                            >
+                                              开启
+                                            </button>
+                                        </div>
+                                    </div>
+                                    <p className="text-xs text-muted-foreground">
+                                        仅影响离线 ASR 模式（OpenAI Compatible / buffered）。默认关闭。
+                                    </p>
+                                </div>
+
                                 <div className="space-y-3">
                                     <div className="flex items-center justify-between gap-3">
                                         <label className="text-sm font-medium text-white flex items-center">