feat: add prompt startup actions and shared vision config

frontend/src/lib/api.ts

@@ -196,6 +196,19 @@ export type TurnConfig = {
   };
 };
 
+export type StartupAction = {
+  id: string;
+  phase: "preflight" | "opening";
+  toolId: string;
+  arguments: Record<string, unknown>;
+  required: boolean;
+};
+
+export type StartupConfig = {
+  executionMode: "sequential";
+  actions: StartupAction[];
+};
+
 /** 后端 AssistantOut(宽表 STI:瘦字段平铺,workflow 用 graph)。apiKey 读时打码 */
 export type Assistant = {
   id: string;
@@ -205,6 +218,7 @@ export type Assistant = {
   greeting: string;
   enableInterrupt: boolean;
   turnConfig: TurnConfig;
+  startup: StartupConfig;
   visionEnabled: boolean;
   visionModelResourceId: string | null;
   modelResourceIds: Partial<Record<ModelType, string>>;