Delete dashboard duplicates on create event

Event-driven cleanup removes stale dashboard messages as soon as Discord emits messageCreate, while preserving the tracked status message.

src/channels/discord-dashboard-create-cleanup.test.ts

@@ -0,0 +1,95 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+vi.mock('../config.js', () => ({
+  STATUS_CHANNEL_ID: 'status-channel',
+}));
+
+vi.mock('../logger.js', () => ({
+  logger: {
+    debug: vi.fn(),
+    info: vi.fn(),
+  },
+}));
+
+const readDashboardStatusMessageIdMock = vi.hoisted(() =>
+  vi.fn(() => 'dashboard-current'),
+);
+
+vi.mock('../status-dashboard.js', () => ({
+  readDashboardStatusMessageId: readDashboardStatusMessageIdMock,
+}));
+
+import {
+  deleteOwnDashboardDuplicateOnCreate,
+  isDashboardTrackedSend,
+} from './discord-dashboard-create-cleanup.js';
+
+function makeDashboardMessage(overrides: {
+  id?: string;
+  channelId?: string;
+  content?: string;
+}) {
+  return {
+    id: overrides.id ?? 'dashboard-stale',
+    channelId: overrides.channelId ?? 'status-channel',
+    content: overrides.content ?? '🤖 *모델 구성*\nMemory 3.3/91.4GB',
+    delete: vi.fn().mockResolvedValue(undefined),
+  } as any;
+}
+
+describe('discord dashboard create cleanup', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    readDashboardStatusMessageIdMock.mockReturnValue('dashboard-current');
+  });
+
+  it('detects tracked dashboard sends', () => {
+    expect(
+      isDashboardTrackedSend(
+        'dc:status-channel',
+        '🤖 *모델 구성*\nMemory 7.5/251.7GB',
+      ),
+    ).toBe(true);
+    expect(isDashboardTrackedSend('dc:other', '🤖 *모델 구성*')).toBe(false);
+    expect(isDashboardTrackedSend('dc:status-channel', 'normal')).toBe(false);
+  });
+
+  it('deletes stale own dashboard messages on create event', async () => {
+    const msg = makeDashboardMessage({ id: 'dashboard-stale' });
+
+    await deleteOwnDashboardDuplicateOnCreate({
+      message: msg,
+      channelName: 'discord',
+      graceUntil: 0,
+      now: 100,
+    });
+
+    expect(msg.delete).toHaveBeenCalledTimes(1);
+  });
+
+  it('keeps the tracked dashboard message', async () => {
+    const msg = makeDashboardMessage({ id: 'dashboard-current' });
+
+    await deleteOwnDashboardDuplicateOnCreate({
+      message: msg,
+      channelName: 'discord',
+      graceUntil: 0,
+      now: 100,
+    });
+
+    expect(msg.delete).not.toHaveBeenCalled();
+  });
+
+  it('keeps dashboard messages during tracked send grace period', async () => {
+    const msg = makeDashboardMessage({ id: 'dashboard-new' });
+
+    await deleteOwnDashboardDuplicateOnCreate({
+      message: msg,
+      channelName: 'discord',
+      graceUntil: 200,
+      now: 100,
+    });
+
+    expect(msg.delete).not.toHaveBeenCalled();
+  });
+});