Apply tenant theme on business login and polish login branding.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/business/src/services/tenantService.ts

@@ -1,5 +1,6 @@
 import { apiRequest } from '../lib/api'
 import type { DashboardLocale } from '@meshkee/dashboard-core'
+import type { BusinessPrimaryColorId } from '../utils/businessPrimaryColors'
 
 export interface ResolvedTenant {
   id: string
@@ -7,12 +8,13 @@ export interface ResolvedTenant {
   nameFa: string | null
   slug: string
   domain: string
+  primaryColor: BusinessPrimaryColorId
   defaultLocale?: DashboardLocale
   logoUrl?: string | null
   faviconUrl?: string | null
 }
 
-export async function resolveTenantByDomain(host: string) {
+export async function resolveTenantByDomain(host: string, signal?: AbortSignal) {
   const encodedHost = encodeURIComponent(host)
-  return apiRequest<ResolvedTenant>(`/tenants/${encodedHost}`)
+  return apiRequest<ResolvedTenant>(`/tenants/${encodedHost}`, { signal })
 }