test: add jest test suite with controller specs and mocks

- add jest, ts-jest, supertest, and related dev dependencies
- add test scripts (test, test:debug, test:watch) to package.json
- add jest.config.js with ts-jest transform and module name mappers
- add controller specs for auth, browser, environment, mcp, scenario, session
- add mocks for jsdom, playwright, and readability
- add test/tsconfig.json and exclude test dir from main tsconfig

test/app.harness.ts

@@ -0,0 +1,78 @@
+import { INestApplication, ValidationPipe } from '@nestjs/common';
+import { Test, TestingModule } from '@nestjs/testing';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { ConfigModule } from '@nestjs/config';
+import { ScheduleModule } from '@nestjs/schedule';
+import debug from 'debug';
+
+jest.mock('@nestjs/common', () => {
+  const actual = jest.requireActual('@nestjs/common');
+  const log = require('debug')('test');
+  const { Logger } = require('@nestjs/common/services/logger.service');
+
+  Logger.prototype.error = function (message: unknown, stack?: string, context?: string) {
+    const ctx = context ?? this.context ?? 'App';
+    log(`[${ctx}]`, 'error', message, ...(stack ? [stack] : []));
+  };
+
+  for (const level of ['log', 'warn', 'debug', 'verbose', 'fatal'] as const) {
+    Logger.prototype[level] = function (message: unknown, context?: string) {
+      const ctx = context ?? this.context ?? 'App';
+      log(`[${ctx}]`, level, message);
+    };
+  }
+
+  return actual;
+});
+
+import { AuthModule } from '../src/auth/auth.module';
+import { BrowserModule } from '../src/browser/browser.module';
+import { SessionModule } from '../src/session/session.module';
+import { EnvironmentModule } from '../src/environment/environment.module';
+import { ScenarioModule } from '../src/scenario/scenario.module';
+import { McpModule } from '../src/mcp/mcp.module';
+import { SessionEntity } from '../src/session/session.entity';
+import { EnvironmentEntity } from '../src/environment/environment.entity';
+import { ScenarioEntity } from '../src/scenario/scenario.entity';
+import { ScenarioStepEntity } from '../src/scenario/scenario-step.entity';
+import { ScenarioRunEntity } from '../src/scenario/scenario-run.entity';
+import { ScenarioRunStepEntity } from '../src/scenario/scenario-run-step.entity';
+import { HealthController } from '../src/health/health.controller';
+import { HttpExceptionFilter } from '../src/filters/http-exception.filter';
+import { LoggingInterceptor } from '../src/interceptors/logging.interceptor';
+
+export async function buildTestApp(): Promise<INestApplication> {
+  const module: TestingModule = await Test.createTestingModule({
+    imports: [
+      ConfigModule.forRoot({ isGlobal: true, ignoreEnvFile: true }),
+      TypeOrmModule.forRoot({
+        type: 'better-sqlite3',
+        database: ':memory:',
+        entities: [
+          SessionEntity,
+          EnvironmentEntity,
+          ScenarioEntity,
+          ScenarioStepEntity,
+          ScenarioRunEntity,
+          ScenarioRunStepEntity,
+        ],
+        synchronize: true,
+      }),
+      ScheduleModule.forRoot(),
+      AuthModule,
+      BrowserModule,
+      SessionModule,
+      EnvironmentModule,
+      ScenarioModule,
+      McpModule,
+    ],
+    controllers: [HealthController],
+  }).compile();
+
+  const app = module.createNestApplication();
+  app.useGlobalPipes(new ValidationPipe({ transform: true, whitelist: true }));
+  app.useGlobalFilters(new HttpExceptionFilter());
+  app.useGlobalInterceptors(new LoggingInterceptor());
+  await app.init();
+  return app;
+}