perf(team): cap global task projections earlier

src/main/services/team/TeamDataService.ts

@@ -1041,9 +1041,21 @@ export class TeamDataService {
 
     const deletedTeams = new Set(teams.filter((t) => t.deletedAt).map((t) => t.teamName));
 
-    const teamNames = [
-      ...new Set(rawTasks.map((t) => t.teamName).filter((n) => teamInfoMap.has(n))),
-    ];
+    const MAX_GLOBAL_TASKS_EXPORTED = 500;
+    let tasksToExport = rawTasks.filter((task) => teamInfoMap.has(task.teamName));
+    if (tasksToExport.length > MAX_GLOBAL_TASKS_EXPORTED) {
+      // Prefer newest first before reading kanban and building the lightweight IPC projection.
+      tasksToExport = tasksToExport
+        .slice()
+        .sort((a, b) => {
+          const at = Date.parse(a.updatedAt ?? a.createdAt ?? '') || 0;
+          const bt = Date.parse(b.updatedAt ?? b.createdAt ?? '') || 0;
+          return bt - at;
+        })
+        .slice(0, MAX_GLOBAL_TASKS_EXPORTED);
+    }
+
+    const teamNames = [...new Set(tasksToExport.map((task) => task.teamName))];
     const kanbanByTeam = new Map<string, KanbanState>();
     await Promise.all(
       teamNames.map(async (teamName) => {
@@ -1058,10 +1070,7 @@ export class TeamDataService {
 
     const out: GlobalTask[] = [];
     let processed = 0;
-    for (const task of rawTasks) {
-      if (!teamInfoMap.has(task.teamName)) {
-        continue;
-      }
+    for (const task of tasksToExport) {
       const info = teamInfoMap.get(task.teamName)!;
       const kanbanTaskState = kanbanByTeam.get(task.teamName)?.tasks[task.id];
       const reviewState = this.resolveTaskReviewState(task, kanbanTaskState);
@@ -1117,18 +1126,6 @@ export class TeamDataService {
       }
     }
 
-    // Hard cap: keep renderer responsive even with huge task sets.
-    const MAX_GLOBAL_TASKS_EXPORTED = 500;
-    if (out.length > MAX_GLOBAL_TASKS_EXPORTED) {
-      // Prefer newest first if timestamps exist.
-      out.sort((a, b) => {
-        const at = Date.parse(a.updatedAt ?? a.createdAt ?? '') || 0;
-        const bt = Date.parse(b.updatedAt ?? b.createdAt ?? '') || 0;
-        return bt - at;
-      });
-      return out.slice(0, MAX_GLOBAL_TASKS_EXPORTED);
-    }
-
     return out;
   }
 

test/main/services/team/TeamDataService.test.ts

@@ -1524,7 +1524,7 @@ describe('TeamDataService', () => {
       {} as never,
       {} as never,
       {} as never,
-      (teamName: string) =>
+      (_teamName: string) =>
         ({
           tasks: {
             createTask: createTaskMock,
@@ -1612,7 +1612,7 @@ describe('TeamDataService', () => {
       {} as never,
       {} as never,
       {} as never,
-      (teamName: string) =>
+      (_teamName: string) =>
         ({
           tasks: {
             createTask: createTaskMock,
@@ -1724,7 +1724,7 @@ describe('TeamDataService', () => {
       {} as never,
       {} as never,
       {} as never,
-      (teamName: string) =>
+      (_teamName: string) =>
         ({
           tasks: {
             createTask: createTaskMock,
@@ -2235,6 +2235,71 @@ describe('TeamDataService', () => {
     });
   });
 
+  it('caps global task projections before building lightweight comment payloads', async () => {
+    const rawTasks = Array.from({ length: 501 }, (_, index) => ({
+      id: `task-${index}`,
+      teamName: index === 0 ? 'old-team' : 'my-team',
+      subject: `Task ${index}`,
+      status: 'pending' as const,
+      owner: 'bob',
+      createdAt: `2026-03-01T00:${String(index % 60).padStart(2, '0')}:00.000Z`,
+      updatedAt: `2026-03-01T${String(Math.floor(index / 60)).padStart(2, '0')}:${String(
+        index % 60
+      ).padStart(2, '0')}:00.000Z`,
+      comments: [
+        {
+          id: `comment-${index}`,
+          author: 'bob',
+          text: `Comment ${index}`,
+          createdAt: '2026-03-01T09:00:00.000Z',
+          type: 'comment' as const,
+        },
+      ],
+    }));
+    const getState = vi.fn(async (teamName: string) => ({
+      teamName,
+      reviewers: [],
+      tasks: {},
+    }));
+    const service = new TeamDataService(
+      {
+        listTeams: vi.fn(async () => [
+          {
+            teamName: 'my-team',
+            displayName: 'My team',
+            projectPath: '/repo',
+          },
+          {
+            teamName: 'old-team',
+            displayName: 'Old team',
+            projectPath: '/old-repo',
+          },
+        ]),
+      } as never,
+      {
+        getAllTasks: vi.fn(async () => rawTasks),
+      } as never,
+      {} as never,
+      {} as never,
+      {} as never,
+      {} as never,
+      {
+        getState,
+      } as never
+    );
+
+    const tasks = await service.getAllTasks();
+
+    expect(tasks).toHaveLength(500);
+    expect(tasks[0]?.id).toBe('task-500');
+    expect(tasks.some((task) => task.id === 'task-0')).toBe(false);
+    expect(tasks[0]?.comments?.[0]).toMatchObject({
+      id: 'comment-500',
+      text: 'Comment 500',
+    });
+    expect(getState).not.toHaveBeenCalledWith('old-team');
+  });
+
   it('lets kanban approved overlay win over stale review history in global task projections', async () => {
     const service = new TeamDataService(
       {