feat: multi-provider support — Anthropic + Ollama (P2-002) (#74)

Co-authored-by: Jason Woltje <[email protected]>
Co-committed-by: Jason Woltje <[email protected]>

apps/gateway/src/agent/providers.controller.ts

@@ -0,0 +1,19 @@
+import { Controller, Get, UseGuards } from '@nestjs/common';
+import { AuthGuard } from '../auth/auth.guard.js';
+import { ProviderService } from './provider.service.js';
+
+@Controller('api/providers')
+@UseGuards(AuthGuard)
+export class ProvidersController {
+  constructor(private readonly providerService: ProviderService) {}
+
+  @Get()
+  list() {
+    return this.providerService.listProviders();
+  }
+
+  @Get('models')
+  listModels() {
+    return this.providerService.listAvailableModels();
+  }
+}