feat: migrate gateway to nestjs

src/server/main.ts

@@ -0,0 +1,78 @@
+import { NestFactory } from '@nestjs/core';
+import { FastifyAdapter, NestFastifyApplication } from '@nestjs/platform-fastify';
+import { AppModule } from './app.module';
+import { logger } from '../utils/logger';
+import { TokenManagerService } from './modules/proxy/token-manager.service';
+
+let app: NestFastifyApplication | null = null;
+let currentPort: number = 0;
+
+export async function bootstrapNestServer(port: number = 8045): Promise<boolean> {
+  if (app) {
+    logger.info('NestJS server already running.');
+    return true;
+  }
+
+  try {
+    app = await NestFactory.create<NestFastifyApplication>(AppModule, new FastifyAdapter(), {
+      logger: ['error', 'warn', 'log'],
+    });
+
+    // Enable CORS
+    app.enableCors();
+
+    await app.listen(port, '0.0.0.0');
+    currentPort = port;
+    logger.info(`NestJS Proxy Server running on http://localhost:${port}`);
+    return true;
+  } catch (error) {
+    logger.error('Failed to start NestJS server', error);
+    return false;
+  }
+}
+
+export async function stopNestServer(): Promise<boolean> {
+  if (app) {
+    try {
+      await app.close();
+      app = null;
+      currentPort = 0;
+      logger.info('NestJS server stopped.');
+      return true;
+    } catch (e) {
+      logger.error('Failed to stop NestJS server', e);
+      return false;
+    }
+  }
+  return true;
+}
+
+export function isNestServerRunning(): boolean {
+  return app !== null;
+}
+
+export async function getNestServerStatus(): Promise<{
+  running: boolean;
+  port: number;
+  base_url: string;
+  active_accounts: number;
+}> {
+  const running = isNestServerRunning();
+  let activeAccounts = 0;
+
+  if (app) {
+    try {
+      const tokenManager = app.get(TokenManagerService);
+      activeAccounts = tokenManager.getAccountCount();
+    } catch (e) {
+      // TokenManager might not be available
+    }
+  }
+
+  return {
+    running,
+    port: currentPort,
+    base_url: running ? `http://localhost:${currentPort}` : '',
+    active_accounts: activeAccounts,
+  };
+}