refactor(frontend): migrate Customer domain to centralized API services

- Replaced all direct axios imports with service layer calls across 8 customer files
- Migrated core pages: home.vue, create.vue, edit.vue
- Migrated profile pages: profile.vue (1100+ lines), TankEstimation.vue
- Migrated supporting pages: ServicePlanEdit.vue, tank/edit.vue, list.vue

Services integrated:
- customerService: CRUD, descriptions, tank info, automatic status
- authService: authentication and Authorize.net account management
- paymentService: credit cards, transactions, payment authorization
- deliveryService: delivery records and automatic delivery data
- serviceService: service calls, parts, and service plans
- adminService: statistics, social comments, and reports
- queryService: dropdown data (customer types, states)

Type safety improvements:
- Updated paymentService.ts with accurate AxiosResponse types
- Fixed response unwrapping to match api.ts interceptor behavior
- Resolved all TypeScript errors in customer domain (0 errors)

Benefits:
- Consistent authentication via centralized interceptors
- Standardized error handling across all API calls
- Improved type safety with proper TypeScript interfaces
- Single source of truth for API endpoints
- Better testability through mockable services

Verified with vue-tsc --noEmit - all customer domain files pass type checking

src/pages/transactions/authorize/index.vue

@@ -198,7 +198,7 @@ export default defineComponent({
         url: path,
         headers: authHeader(),
       }).then((response: any) => {
-        this.transactions = response.data
+        this.transactions = response.data?.transactions || response.data || []
       }).catch(() => {
         this.transactions = []
       })
@@ -221,6 +221,7 @@ export default defineComponent({
       }
     },
     formatDate(dateStr: string) {
+      if (!dateStr) return 'N/A';
       return dateStr.split('T')[0]; // YYYY-MM-DD
     },
     getCaptureRoute(transaction: AuthorizeTransaction) {