feat(asset-ai): add contextual analysis and unmet-demand feedback

src/modules/assets/assistant/client.ts

@@ -1,11 +1,21 @@
 import { fetchAuthenticated } from "../../../auth/api-client";
 import type {
   AssistantEvent,
-  QueryPlan,
+  AssistantRequest,
 } from "../../../shared/assets/assistant";
 
+export class AssistantRequestError extends Error {
+  constructor(
+    message: string,
+    public status: number,
+  ) {
+    super(message);
+    this.name = "AssistantRequestError";
+  }
+}
+
 export async function askAssetAssistant(
-  input: { message: string; subject: string | null; previous?: QueryPlan },
+  input: AssistantRequest,
   signal: AbortSignal,
   onEvent: (event: AssistantEvent) => void,
 ) {
@@ -17,7 +27,10 @@ export async function askAssetAssistant(
   });
   if (!response.ok) {
     const body = await response.json().catch(() => null);
-    throw new Error(body?.error || "查询服务暂时不可用。");
+    throw new AssistantRequestError(
+      body?.error || "查询服务暂时不可用。",
+      response.status,
+    );
   }
   if (!response.body) throw new Error("当前浏览器无法读取查询进度。");
   const reader = response.body.getReader();