feat: implement scoped dataset catalog and template input drafts

frontend/src/ai/ChatPanel.tsx

@@ -434,9 +434,11 @@ export function ChatPanel({
       </div>
       <footer className="ai-composer" ref={input}>
         <div className="ai-context">
-          {context.page === "account"
-            ? "上下文：个人信息页"
-            : `上下文：${context.alpha_id ? `Alpha ${context.alpha_id}` : "Alpha 列表"}${context.selected_ids?.length ? ` · 已选 ${context.selected_ids.length} 条` : ""}`}
+          {context.page === "datasets"
+            ? "上下文：数据目录（未发送字段与备注）"
+            : context.page === "account"
+              ? "上下文：个人信息页"
+              : `上下文：${context.alpha_id ? `Alpha ${context.alpha_id}` : "Alpha 列表"}${context.selected_ids?.length ? ` · 已选 ${context.selected_ids.length} 条` : ""}`}
         </div>
         <TextArea
           aria-label="发送给研究助手"

frontend/src/ai/types.ts

@@ -11,7 +11,7 @@ export type ModelSettings = {
   test_results: Record<string, { ok: boolean; message: string }>;
 };
 export type PageContext = {
-  page: "alphas" | "account";
+  page: "alphas" | "account" | "datasets";
   alpha_id?: string | null;
   selected_ids?: string[];
   filters?: Record<string, unknown>;