Initial commit: Helpdesk application setup

- Backend: Node.js/TypeScript with Prisma ORM
- Frontend: Vite + TypeScript
- Project configuration and documentation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/services/rma.api.ts

@@ -0,0 +1,75 @@
+import { get, getPaginated, post, put, del } from './api';
+import type { RMA } from '@/types';
+
+export interface RMAFilters {
+  search?: string;
+  customerId?: string;
+  statusId?: string;
+  assignedToId?: string;
+  page?: number;
+  limit?: number;
+}
+
+export interface CreateRMAData {
+  customerId?: string;
+  customerName?: string;
+  customerAddress?: string;
+  customerEmail?: string;
+  customerPhone?: string;
+  customerICO?: string;
+  submittedBy: string;
+  productName: string;
+  invoiceNumber?: string;
+  purchaseDate?: string;
+  productNumber?: string;
+  serialNumber?: string;
+  accessories?: string;
+  issueDescription: string;
+  statusId: string;
+  requiresApproval?: boolean;
+  assignedToId?: string;
+}
+
+export interface UpdateRMAData {
+  statusId?: string;
+  proposedSolutionId?: string;
+  requiresApproval?: boolean;
+  approvedById?: string;
+  receivedDate?: string;
+  receivedLocation?: string;
+  internalNotes?: string;
+  resolutionDate?: string;
+  resolutionNotes?: string;
+  assignedToId?: string;
+}
+
+function buildQueryString(filters: RMAFilters): string {
+  const params = new URLSearchParams();
+  if (filters.search) params.append('search', filters.search);
+  if (filters.customerId) params.append('customerId', filters.customerId);
+  if (filters.statusId) params.append('statusId', filters.statusId);
+  if (filters.assignedToId) params.append('assignedToId', filters.assignedToId);
+  if (filters.page) params.append('page', String(filters.page));
+  if (filters.limit) params.append('limit', String(filters.limit));
+  return params.toString();
+}
+
+export const rmaApi = {
+  getAll: (filters: RMAFilters = {}) =>
+    getPaginated<RMA>(`/rma?${buildQueryString(filters)}`),
+
+  getById: (id: string) =>
+    get<RMA>(`/rma/${id}`),
+
+  create: (data: CreateRMAData) =>
+    post<RMA>('/rma', data),
+
+  update: (id: string, data: UpdateRMAData) =>
+    put<RMA>(`/rma/${id}`, data),
+
+  delete: (id: string) =>
+    del<void>(`/rma/${id}`),
+
+  approve: (id: string) =>
+    post<RMA>(`/rma/${id}/approve`),
+};