fix: Add reserved subdomains constant and update validation on generateSubdomain (#15217)

## Description

Fixes #15160 

- Moved the reserved subdomains to a separate shared constant file:
`packages/twenty-server/src/engine/core-modules/workspace/constants/reserved-subdomains.constant.ts`
- Updated the validation while generating subdomain to check if the
extracted subdomain (from email or display name) is reserved
- When a reserved subdomain is detected, the server will automatically
fall back to a random subdomain

---------

Co-authored-by: Naineel Soyantar <naineelsoyantar@gmail.com>
Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/engine/core-modules/client-config/client-config.module.ts

@@ -1,13 +1,13 @@
 import { Module } from '@nestjs/common';
 
-import { DomainManagerModule } from 'src/engine/core-modules/domain-manager/domain-manager.module';
+import { DomainServerConfigModule } from 'src/engine/core-modules/domain/domain-server-config/domain-server-config.module';
 
 import { ClientConfigController } from './client-config.controller';
 
 import { ClientConfigService } from './services/client-config.service';
 
 @Module({
-  imports: [DomainManagerModule],
+  imports: [DomainServerConfigModule],
   controllers: [ClientConfigController],
   providers: [ClientConfigService],
 })

packages/twenty-server/src/engine/core-modules/client-config/services/client-config.service.spec.ts

@@ -6,14 +6,14 @@ import { SupportDriver } from 'src/engine/core-modules/twenty-config/interfaces/
 import { AiModelRegistryService } from 'src/engine/core-modules/ai/services/ai-model-registry.service';
 import { CaptchaDriverType } from 'src/engine/core-modules/captcha/interfaces';
 import { ClientConfigService } from 'src/engine/core-modules/client-config/services/client-config.service';
-import { DomainManagerService } from 'src/engine/core-modules/domain-manager/services/domain-manager.service';
+import { DomainServerConfigService } from 'src/engine/core-modules/domain/domain-server-config/services/domain-server-config.service';
 import { PUBLIC_FEATURE_FLAGS } from 'src/engine/core-modules/feature-flag/constants/public-feature-flag.const';
 import { TwentyConfigService } from 'src/engine/core-modules/twenty-config/twenty-config.service';
 
 describe('ClientConfigService', () => {
   let service: ClientConfigService;
   let twentyConfigService: TwentyConfigService;
-  let domainManagerService: DomainManagerService;
+  let domainServerConfigService: DomainServerConfigService;
 
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
@@ -26,7 +26,7 @@ describe('ClientConfigService', () => {
           },
         },
         {
-          provide: DomainManagerService,
+          provide: DomainServerConfigService,
           useValue: {
             getFrontUrl: jest.fn(),
           },
@@ -42,8 +42,9 @@ describe('ClientConfigService', () => {
 
     service = module.get<ClientConfigService>(ClientConfigService);
     twentyConfigService = module.get<TwentyConfigService>(TwentyConfigService);
-    domainManagerService =
-      module.get<DomainManagerService>(DomainManagerService);
+    domainServerConfigService = module.get<DomainServerConfigService>(
+      DomainServerConfigService,
+    );
   });
 
   it('should be defined', () => {
@@ -91,7 +92,7 @@ describe('ClientConfigService', () => {
           return mockValues[key];
         });
 
-      jest.spyOn(domainManagerService, 'getFrontUrl').mockReturnValue({
+      jest.spyOn(domainServerConfigService, 'getFrontUrl').mockReturnValue({
         hostname: 'app.twenty.com',
       } as URL);
     });

packages/twenty-server/src/engine/core-modules/client-config/services/client-config.service.ts

@@ -15,7 +15,7 @@ import {
   type ClientAIModelConfig,
   type ClientConfig,
 } from 'src/engine/core-modules/client-config/client-config.entity';
-import { DomainManagerService } from 'src/engine/core-modules/domain-manager/services/domain-manager.service';
+import { DomainServerConfigService } from 'src/engine/core-modules/domain/domain-server-config/services/domain-server-config.service';
 import { PUBLIC_FEATURE_FLAGS } from 'src/engine/core-modules/feature-flag/constants/public-feature-flag.const';
 import { TwentyConfigService } from 'src/engine/core-modules/twenty-config/twenty-config.service';
 
@@ -23,7 +23,7 @@ import { TwentyConfigService } from 'src/engine/core-modules/twenty-config/twent
 export class ClientConfigService {
   constructor(
     private twentyConfigService: TwentyConfigService,
-    private domainManagerService: DomainManagerService,
+    private domainServerConfigService: DomainServerConfigService,
     private aiModelRegistryService: AiModelRegistryService,
   ) {}
 
@@ -107,7 +107,7 @@ export class ClientConfigService {
         'IS_EMAIL_VERIFICATION_REQUIRED',
       ),
       defaultSubdomain: this.twentyConfigService.get('DEFAULT_SUBDOMAIN'),
-      frontDomain: this.domainManagerService.getFrontUrl().hostname,
+      frontDomain: this.domainServerConfigService.getFrontUrl().hostname,
       debugMode:
         this.twentyConfigService.get('NODE_ENV') ===
         NodeEnvironment.DEVELOPMENT,