fix: support vision prompt modes

frontend/src/lib/api.ts

@@ -315,6 +315,8 @@ export type AnalysisConfig = {
   fields: AnalysisField[];
 };
 
+export type VisionPromptMode = "fixed" | "runtime" | "guided";
+
 /** 后端 AssistantOut(宽表 STI:瘦字段平铺,workflow 用 graph)。apiKey 读时打码 */
 export type Assistant = {
   id: string;
@@ -327,7 +329,8 @@ export type Assistant = {
   startup: StartupConfig;
   visionEnabled: boolean;
   visionModelResourceId: string | null;
-  visionFocusPrompt: string;
+  visionPromptMode: VisionPromptMode;
+  visionPrompt: string;
   modelResourceIds: Partial<Record<ModelType, string>>;
   knowledgeBaseId: string | null;
   knowledgeRetrievalConfig: KnowledgeRetrievalConfig;
@@ -372,14 +375,6 @@ export const assistantsApi = {
   // 服务端整行复制(含真 key,密钥不经浏览器)
   duplicate: (id: string) =>
     request<Assistant>(`/api/assistants/${id}/duplicate`, { method: "POST" }),
-  generateVisionFocus: (body: {
-    sourcePrompt: string;
-    modelResourceId: string;
-  }) =>
-    request<{ focusPrompt: string }>("/api/assistants/vision-focus/generate", {
-      method: "POST",
-      body: JSON.stringify(body),
-    }),
   remove: (id: string) =>
     request<{ ok: boolean }>(`/api/assistants/${id}`, { method: "DELETE" }),
 };