Add turn configuration support for assistants

- Introduce a new `turnConfig` field in `AssistantConfig` and `Assistant` models to manage user interaction settings.
- Implement `TurnConfig`, `BargeInConfig`, `VadConfig`, and `TurnDetectionConfig` schemas to define turn management strategies.
- Update the backend to handle turn configuration in the database and during assistant operations.
- Enhance frontend components with a `TurnConfigEditor` for configuring turn settings, including VAD and barge-in strategies.
- Modify existing pages to integrate turn configuration, improving user experience and interaction capabilities.

frontend/src/lib/api.ts

@@ -150,6 +150,21 @@ export type AssistantType =
   | "fastgpt"
   | "opencode";
 export type RuntimeMode = "pipeline" | "realtime";
+export type TurnConfig = {
+  bargeIn: {
+    strategy: "vad" | "transcription";
+  };
+  vad: {
+    confidence: number;
+    startSecs: number;
+    stopSecs: number;
+    minVolume: number;
+  };
+  turnDetection: {
+    strategy: "silence" | "smart_turn";
+    silenceTimeoutSecs: number;
+  };
+};
 
 /** 后端 AssistantOut(宽表 STI:瘦字段平铺,workflow 用 graph)。apiKey 读时打码 */
 export type Assistant = {
@@ -159,6 +174,7 @@ export type Assistant = {
   runtimeMode: RuntimeMode;
   greeting: string;
   enableInterrupt: boolean;
+  turnConfig: TurnConfig;
   visionEnabled: boolean;
   visionModelResourceId: string | null;
   modelResourceIds: Partial<Record<ModelType, string>>;