test(server): src/config takes fixed test values from the setup file, so suites stop mocking it

tests/setup.ts mocks src/config once with tests/helpers/test-config.ts. A suite that needs other values calls overrideTestConfig(), and the setup file restores the defaults after every case. The 191 per-file factories are gone; config.test.ts takes the real module through vi.unmock, and the few suites that signed tokens with their own literal secret read it from TEST_CONFIG.

server/tests/unit/mcp/tools-notes.test.ts

@@ -8,16 +8,10 @@
 import { describe, it, expect, vi, beforeAll, beforeEach, afterAll } from 'vitest';
 import { db as testDb } from '../../../src/db/database';
 
-
 vi.mock('../../../src/db/database', async () => {
   const { createSnapshotTestDb, buildDbMock } = await import('../../helpers/db-mock');
   return buildDbMock(createSnapshotTestDb());
 });
-vi.mock('../../../src/config', () => ({
-  JWT_SECRET: 'test-jwt-secret-for-trek-testing-only',
-  ENCRYPTION_KEY: 'a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6a7b8c9d0e1f2a3b4c5d6a7b8c9d0e1f2',
-  updateJwtSecret: () => {},
-}));
 
 const { broadcastMock, unlinkSyncMock } = vi.hoisted(() => ({
   broadcastMock: vi.fn(),