feat(routing): routing_rules schema + types — M4-001/002/003 (#315)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

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

@@ -1,15 +1,23 @@
-import { Body, Controller, Get, Inject, Post, UseGuards } from '@nestjs/common';
+import { Body, Controller, Delete, Get, Inject, Param, Post, UseGuards } from '@nestjs/common';
 import type { RoutingCriteria } from '@mosaic/types';
 import { AuthGuard } from '../auth/auth.guard.js';
+import { CurrentUser } from '../auth/current-user.decorator.js';
 import { ProviderService } from './provider.service.js';
+import { ProviderCredentialsService } from './provider-credentials.service.js';
 import { RoutingService } from './routing.service.js';
 import type { TestConnectionDto, TestConnectionResultDto } from './provider.dto.js';
+import type {
+  StoreCredentialDto,
+  ProviderCredentialSummaryDto,
+} from './provider-credentials.dto.js';
 
 @Controller('api/providers')
 @UseGuards(AuthGuard)
 export class ProvidersController {
   constructor(
     @Inject(ProviderService) private readonly providerService: ProviderService,
+    @Inject(ProviderCredentialsService)
+    private readonly credentialsService: ProviderCredentialsService,
     @Inject(RoutingService) private readonly routingService: RoutingService,
   ) {}
 
@@ -42,4 +50,49 @@ export class ProvidersController {
   rank(@Body() criteria: RoutingCriteria) {
     return this.routingService.rank(criteria);
   }
+
+  // ── Credential CRUD ──────────────────────────────────────────────────────
+
+  /**
+   * GET /api/providers/credentials
+   * List all provider credentials for the authenticated user.
+   * Returns provider names, types, and metadata — never decrypted values.
+   */
+  @Get('credentials')
+  listCredentials(@CurrentUser() user: { id: string }): Promise<ProviderCredentialSummaryDto[]> {
+    return this.credentialsService.listProviders(user.id);
+  }
+
+  /**
+   * POST /api/providers/credentials
+   * Store or update a provider credential for the authenticated user.
+   * The value is encrypted before storage and never returned.
+   */
+  @Post('credentials')
+  async storeCredential(
+    @CurrentUser() user: { id: string },
+    @Body() body: StoreCredentialDto,
+  ): Promise<{ success: boolean; provider: string }> {
+    await this.credentialsService.store(
+      user.id,
+      body.provider,
+      body.type,
+      body.value,
+      body.metadata,
+    );
+    return { success: true, provider: body.provider };
+  }
+
+  /**
+   * DELETE /api/providers/credentials/:provider
+   * Remove a stored credential for the authenticated user.
+   */
+  @Delete('credentials/:provider')
+  async removeCredential(
+    @CurrentUser() user: { id: string },
+    @Param('provider') provider: string,
+  ): Promise<{ success: boolean; provider: string }> {
+    await this.credentialsService.remove(user.id, provider);
+    return { success: true, provider };
+  }
 }