introduces workspace items as combined search+chat model

tui/src/api.ts

@@ -10,6 +10,7 @@ import type {
   SearchStreamHandlers,
   SearchSummary,
   SessionStatus,
+  WorkspaceItem,
 } from "./types.js";
 
 type RequestOptions = {
@@ -41,6 +42,11 @@ export class SybilApiClient {
     return data.chats;
   }
 
+  async listWorkspaceItems() {
+    const data = await this.request<{ items: WorkspaceItem[] }>("/v1/workspace-items");
+    return data.items;
+  }
+
   async createChat(title?: string) {
     const data = await this.request<{ chat: ChatSummary }>("/v1/chats", {
       method: "POST",