feat: Full petmaster CRM with NestJS API and React frontend

- Client management (CRUD with JSONB custom fields)
- Pet profiles
- Service catalog with per-client pricing
- Booking calendar with recurring appointments
- Invoicing with Stripe integration
- Real-time messaging (WebSocket)
- Self-booking portal
- Staff assignment
- Docker multi-stage builds
- Prisma schema + seed

api/prisma/schema.prisma

@@ -0,0 +1,162 @@
+model Client {
+  id        String   @id @default(cuid())
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  firstName String
+  lastName  String
+  email     String   @unique
+  phone     String?
+  address   String?
+  notes     String?  @default("")
+  customFields Json?
+  isActive  Boolean  @default(true)
+
+  pets      Pet[]
+  bookings  Booking[]
+  invoices  Invoice[]
+  messages  Message[]  @relation("ClientMessages")
+
+  @@map("clients")
+}
+
+model Pet {
+  id        String   @id @default(cuid())
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  name      String
+  species   String
+  breed     String?
+  age       Int?
+  weight    String?  // e.g. "55 lbs"
+  color     String?
+  tags      String[] @default([])
+  notes     String?  @default("")
+  customFields Json?
+  clientId  String
+  client    Client   @relation(fields: [clientId], references: [id], onDelete: Cascade)
+
+  @@map("pets")
+}
+
+model Service {
+  id        String   @id @default(cuid())
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  name      String
+  description String @default("")
+  duration  Int      // minutes
+  basePrice Float    // dollars
+
+  perClientPricing ClientPricing[]
+
+  @@map("services")
+}
+
+model ClientPricing {
+  id        String   @id @default(cuid())
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  price     Float
+  discountType String @default("none") // none, percentage, flat
+  discountValue Float @default(0)
+
+  serviceId String
+  service   Service @relation(fields: [serviceId], references: [id], onDelete: Cascade)
+  clientId  String
+  client    Client  @relation(fields: [clientId], references: [id], onDelete: Cascade)
+
+  @@unique([serviceId, clientId])
+  @@map("client_pricing")
+}
+
+model Booking {
+  id          String    @id @default(cuid())
+  createdAt   DateTime  @default(now())
+  updatedAt   DateTime  @updatedAt
+  startAt     DateTime
+  endAt       DateTime
+  status      BookingStatus @default(scheduled)
+  notes       String?   @default("")
+  customFields Json?
+
+  clientId    String
+  client      Client    @relation(fields: [clientId], references: [id])
+  serviceId   String
+  service     Service   @relation(fields: [serviceId], references: [id])
+  assignedStaff String?
+  priceOverride Float?
+  petId       String?
+  pet         Pet?      @relation(fields: [petId], references: [id])
+  invoice     Invoice?
+
+  recurringRule Json? // { interval: "weekly" | "biweekly" | "monthly", count: Int, endDate: DateTime? }
+
+  @@map("bookings")
+}
+
+enum BookingStatus {
+  scheduled
+  confirmed
+  in_progress
+  completed
+  cancelled
+}
+
+model Invoice {
+  id          String       @id @default(cuid())
+  createdAt   DateTime     @default(now())
+  updatedAt   DateTime     @updatedAt
+  invoiceNumber String     @unique
+  dueDate     DateTime
+  status      InvoiceStatus @default(draft)
+  stripePaymentIntentId String?
+  subtotal    Float        @default(0)
+  tax         Float        @default(0)
+  total       Float        @default(0)
+  notes       String?      @default("")
+
+  clientId    String
+  client      Client       @relation(fields: [clientId], references: [id])
+  bookingId   String?
+  booking     Booking?     @relation(fields: [bookingId], references: [id])
+
+  items       InvoiceItem[]
+
+  @@map("invoices")
+}
+
+enum InvoiceStatus {
+  draft
+  sent
+  paid
+  overdue
+  cancelled
+}
+
+model InvoiceItem {
+  id          String   @id @default(cuid())
+  createdAt   DateTime @default(now())
+  description String
+  quantity    Int      @default(1)
+  unitPrice   Float
+  amount      Float
+
+  invoiceId   String
+  invoice     Invoice  @relation(fields: [invoiceId], references: [id], onDelete: Cascade)
+
+  @@map("invoice_items")
+}
+
+model Message {
+  id        String   @id @default(cuid())
+  createdAt DateTime @default(now())
+  readAt    DateTime?
+  content   String
+  isFromStaff Boolean @default(false)
+
+  clientId  String
+  client    Client   @relation("ClientMessages", fields: [clientId], references: [id])
+  staffId   String   // staff member identifier
+
+  @@map("messages")
+}

api/prisma/seed.ts

@@ -0,0 +1,32 @@
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+async function main() {
+  // Create default services
+  const services = [
+    { name: 'Full Groom', description: 'Complete bath, haircut, nail trim', duration: 90, basePrice: 75 },
+    { name: 'Bath & Brush', description: 'Thorough bath with brushing', duration: 45, basePrice: 45 },
+    { name: 'Nail Trim', description: 'Quick nail clipping', duration: 15, basePrice: 15 },
+    { name: 'Dog Walking', description: '30 minute supervised walk', duration: 30, basePrice: 25 },
+    { name: 'Boarding (Standard)', description: 'Overnight boarding with feeding', duration: 1440, basePrice: 55 },
+    { name: 'Drop-in Visit', description: '20 min play/walk visit', duration: 20, basePrice: 30 },
+  ];
+
+  for (const svc of services) {
+    await prisma.service.upsert({
+      where: { name: svc.name },
+      update: svc,
+      create: svc,
+    });
+  }
+
+  console.log('Seed completed: default services created');
+}
+
+main().catch((e) => {
+  console.error(e);
+  process.exit(1);
+}).finally(async () => {
+  await prisma.$disconnect();
+});