feat(web): prepare the fluxer.com domain migration (#2952)

fluxer_api/src/api/instance/InstanceController.ts

@@ -16,6 +16,7 @@ import type {HonoEnv} from '@app/api/types/HonoEnv';
 import {API_CODE_VERSION} from '@fluxer/constants/src/AppConstants';
 import {buildDiscoveryResponse, type DiscoveryStaticInput} from '@fluxer/instance_bootstrap/src/BuildDiscovery';
 import type {InstanceAppPublic} from '@fluxer/instance_bootstrap/src/Types';
+import {toDomainMigrationDiscovery} from '@fluxer/schema/src/domains/admin/DomainMigrationSchemas';
 import {WellKnownFluxerResponse} from '@fluxer/schema/src/domains/instance/InstanceSchemas';
 import type {Hono} from 'hono';
 
@@ -102,15 +103,16 @@ export function InstanceController(app: Hono<HonoEnv>) {
 			const limits = ctx.get('limitConfigService').getConfigWireFormat();
 			const sso = await ctx.get('ssoService').getPublicStatus();
 			const instanceConfigRepository = ctx.get('instanceConfigRepository');
-			const [registration, community, services, appPublicConfig, captcha, email] = await Promise.all([
+			const [registration, community, services, appPublicConfig, captcha, email, domainMigration] = await Promise.all([
 				instanceConfigRepository.getRegistrationPublicConfig(),
 				instanceConfigRepository.getInstanceCommunityPublicConfig(),
 				instanceConfigRepository.getResolvedServicesConfig(),
 				instanceConfigRepository.getAppPublicConfig(),
 				instanceConfigRepository.getEffectiveCaptchaConfig(),
 				instanceConfigRepository.getEffectiveEmailConfig(),
+				instanceConfigRepository.getDomainMigrationConfig(),
 			]);
-			const response = buildDiscoveryResponse(
+			const discovery = buildDiscoveryResponse(
 				buildDiscoveryStaticInput(
 					gifService,
 					{
@@ -133,6 +135,7 @@ export function InstanceController(app: Hono<HonoEnv>) {
 					limits,
 				},
 			);
+			const response = {...discovery, domain_migration: toDomainMigrationDiscovery(domainMigration)};
 			discoveryValidators = nextDiscoveryValidators(response, discoveryValidators);
 			ctx.header('ETag', discoveryValidators.etag);
 			ctx.header('Last-Modified', discoveryValidators.lastModified.toUTCString());