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/integration/api-docs.test.ts

@@ -12,15 +12,6 @@ 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: () => {},
-  SESSION_DURATION: '24h',
-  SESSION_DURATION_MS: 86400000,
-  SESSION_DURATION_SECONDS: 86400,
-  DEFAULT_LANGUAGE: 'en',
-}));
 vi.mock('../../src/websocket', () => ({ broadcast: vi.fn(), broadcastToUser: vi.fn() }));
 
 import { db as testDb } from '../../src/db/database';