feat: migrate gateway to nestjs

src/server/modules/proxy/proxy.module.ts

@@ -0,0 +1,11 @@
+import { Module } from '@nestjs/common';
+import { ProxyController } from './proxy.controller';
+import { ProxyService } from './proxy.service';
+import { TokenManagerService } from './token-manager.service';
+import { GeminiClient } from './clients/gemini.client';
+
+@Module({
+  controllers: [ProxyController],
+  providers: [ProxyService, TokenManagerService, GeminiClient],
+})
+export class ProxyModule {}