fix(mention): prefetch squads so @mention list shows all squads

Closes MUL-2176

packages/core/agents/use-workspace-presence-prefetch.ts

@@ -1,20 +1,22 @@
 "use client";
 
 import { useQuery } from "@tanstack/react-query";
-import { agentListOptions } from "../workspace/queries";
+import { agentListOptions, squadListOptions } from "../workspace/queries";
 import { runtimeListOptions } from "../runtimes/queries";
 import { agentTaskSnapshotOptions } from "./queries";
 
-// Subscribe to the three queries that power agent presence so they're warm
-// by the time any hover card / inline indicator first renders. Without this
-// warm-up, surfaces that don't otherwise touch the snapshot (inbox, issues,
-// chat) flash a skeleton on first hover while the fetch is in flight.
+// Subscribe to the queries that power agent presence and the @mention
+// suggestion list so they're warm by the time any hover card / inline
+// indicator / mention popup first renders. Without this warm-up, surfaces
+// that don't otherwise touch the snapshot (inbox, issues, chat) flash a
+// skeleton on first hover while the fetch is in flight, and the @mention
+// list may show incomplete results (e.g. missing squads).
 //
-// useRealtimeSync (WS task / agent / daemon invalidations) and the 30s
-// presence tick keep these caches fresh after the initial fetch — this hook
-// only collapses the cold-start window.
+// useRealtimeSync (WS task / agent / daemon / squad invalidations) and the
+// 30s presence tick keep these caches fresh after the initial fetch — this
+// hook only collapses the cold-start window.
 //
-// All three are workspace-scoped; the queryKeys include wsId so workspace
+// All queries are workspace-scoped; the queryKeys include wsId so workspace
 // switch automatically refetches the new workspace's data with no extra
 // wiring here. The workspace-scoped layouts on both apps gate rendering on
 // "workspace resolved", so callers can safely pass useWorkspaceId() — by the
@@ -23,4 +25,5 @@ export function useWorkspacePresencePrefetch(wsId: string | undefined): void {
   useQuery({ ...agentListOptions(wsId ?? ""), enabled: !!wsId });
   useQuery({ ...runtimeListOptions(wsId ?? ""), enabled: !!wsId });
   useQuery({ ...agentTaskSnapshotOptions(wsId ?? ""), enabled: !!wsId });
+  useQuery({ ...squadListOptions(wsId ?? ""), enabled: !!wsId });
 }

packages/views/editor/extensions/mention-suggestion.test.tsx

@@ -61,11 +61,17 @@ function fakeQc(data: {
     visibility?: "workspace" | "private";
     owner_id?: string | null;
   }>;
+  squads?: Array<{
+    id: string;
+    name: string;
+    archived_at: string | null;
+  }>;
   issues?: Array<{ id: string; identifier: string; title: string; status: string }>;
 }): QueryClient {
   const map = new Map<string, unknown>();
   map.set(JSON.stringify(workspaceKeys.members("ws-1")), data.members ?? []);
   map.set(JSON.stringify(workspaceKeys.agents("ws-1")), data.agents ?? []);
+  map.set(JSON.stringify(workspaceKeys.squads("ws-1")), data.squads ?? []);
   const byStatus: ListIssuesCache["byStatus"] = {};
   for (const status of PAGINATED_STATUSES) {
     const bucket = (data.issues ?? []).filter((i) => i.status === status);
@@ -244,4 +250,39 @@ describe("createMentionSuggestion", () => {
     const items = result as MentionItem[];
     expect(items.some((i) => i.type === "issue" && i.id === "i1")).toBe(true);
   });
+
+  it("includes all non-archived squads in the mention list", () => {
+    const qc = fakeQc({
+      members: [{ user_id: "u1", name: "Alice", role: "member" }],
+      squads: [
+        { id: "s1", name: "Jiayuan's Coding Team", archived_at: null },
+        { id: "s2", name: "独立团", archived_at: null },
+        { id: "s3", name: "Archived Squad", archived_at: "2026-01-01T00:00:00Z" },
+      ],
+    });
+    searchIssuesMock.mockReturnValue(new Promise(() => {}));
+
+    const config = createMentionSuggestion(qc);
+    const result = config.items!({ query: "", editor: {} as never });
+
+    const items = result as MentionItem[];
+    expect(items.filter((i) => i.type === "squad")).toHaveLength(2);
+    expect(items.some((i) => i.type === "squad" && i.label === "Jiayuan's Coding Team")).toBe(true);
+    expect(items.some((i) => i.type === "squad" && i.label === "独立团")).toBe(true);
+    expect(items.some((i) => i.type === "squad" && i.label === "Archived Squad")).toBe(false);
+  });
+
+  it("returns no squads when the squads cache is empty (not yet fetched)", () => {
+    const qc = fakeQc({
+      members: [{ user_id: "u1", name: "Alice", role: "member" }],
+      // squads not provided — simulates cache miss
+    });
+    searchIssuesMock.mockReturnValue(new Promise(() => {}));
+
+    const config = createMentionSuggestion(qc);
+    const result = config.items!({ query: "", editor: {} as never });
+
+    const items = result as MentionItem[];
+    expect(items.filter((i) => i.type === "squad")).toHaveLength(0);
+  });
 });