feat: Complete Sprints 3 & 4 - Email, Reschedule, OCR, Upload, Contact Forms

Sprint 3 - Crisis y Agenda (100%):
- Implement SMTP email service with nodemailer
- Create email templates (reschedule, daily agenda, course inquiry)
- Add appointment reschedule functionality with modal
- Add Google Calendar updateEvent function
- Create scheduled job for daily agenda email at 10 PM
- Add manual trigger endpoint for testing

Sprint 4 - Pagos y Roles (100%):
- Add Payment proof upload with OCR (tesseract.js, pdf-parse)
- Extract data from proofs (amount, date, reference, sender, bank)
- Create PaymentUpload component with drag & drop
- Add course contact form to /cursos page
- Update Services button to navigate to /servicios
- Add Reschedule button to Assistant and Therapist dashboards
- Add PaymentUpload component to Assistant dashboard
- Add eventId field to Appointment model
- Add OCR-extracted fields to Payment model
- Update Prisma schema and generate client
- Create API endpoints for reschedule, upload-proof, courses contact
- Create manual trigger endpoint for daily agenda job
- Initialize daily agenda job in layout.tsx

Dependencies added:
- nodemailer, node-cron, tesseract.js, sharp, pdf-parse, @types/nodemailer

Files created/modified:
- src/infrastructure/email/smtp.ts
- src/lib/email/templates/*
- src/jobs/send-daily-agenda.ts
- src/app/api/calendar/reschedule/route.ts
- src/app/api/payments/upload-proof/route.ts
- src/app/api/contact/courses/route.ts
- src/app/api/jobs/trigger-agenda/route.ts
- src/components/dashboard/RescheduleModal.tsx
- src/components/dashboard/PaymentUpload.tsx
- src/components/forms/CourseContactForm.tsx
- src/app/dashboard/asistente/page.tsx (updated)
- src/app/dashboard/terapeuta/page.tsx (updated)
- src/app/cursos/page.tsx (updated)
- src/components/layout/Services.tsx (updated)
- src/infrastructure/external/calendar.ts (updated)
- src/app/layout.tsx (updated)
- prisma/schema.prisma (updated)
- src/lib/validations.ts (updated)
- src/lib/env.ts (updated)

Tests:
- TypeScript typecheck: No errors
- ESLint: Only warnings (img tags, react-hooks)
- Production build: Successful

Documentation:
- Updated CHANGELOG.md with Sprint 3/4 changes
- Updated PROGRESS.md with 100% completion status
- Updated TASKS.md with completed tasks

prisma/schema.prisma

@@ -0,0 +1,119 @@
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "sqlite"
+  url      = env("DATABASE_URL")
+}
+
+model User {
+  id        String   @id @default(cuid())
+  email     String   @unique
+  phone     String   @unique
+  name      String
+  role      String   @default("PATIENT")
+  password  String?
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  payments Payment[]
+}
+
+model Patient {
+  phone      String   @id
+  name       String
+  birthdate  DateTime
+  status     String   @default("active")
+  email      String?
+  createdAt  DateTime @default(now())
+  updatedAt  DateTime @updatedAt
+
+  appointments Appointment[]
+  clinicalNotes ClinicalNote[]
+  files       PatientFile[]
+}
+
+model Appointment {
+  id              Int       @id @default(autoincrement())
+  patientPhone    String
+  date            DateTime
+  status          String    @default("pending")
+  isCrisis        Boolean   @default(false)
+  eventId         String?
+  paymentProofUrl String?
+  payment         Payment?
+  paymentId       Int?
+  createdAt       DateTime @default(now())
+  updatedAt       DateTime @updatedAt
+
+  patient  Patient  @relation(fields: [patientPhone], references: [phone], onDelete: Cascade)
+
+  @@index([patientPhone])
+  @@index([date])
+}
+
+model ClinicalNote {
+  id        Int      @id @default(autoincrement())
+  patientId String
+  content   String
+  tags      String?
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  patient Patient @relation(fields: [patientId], references: [phone], onDelete: Cascade)
+
+  @@index([patientId])
+}
+
+model VoiceNote {
+  id        Int      @id @default(autoincrement())
+  filename  String
+  duration  Int
+  sentAt    DateTime @default(now())
+  expiresAt DateTime
+  createdAt DateTime @default(now())
+
+  @@index([expiresAt])
+}
+
+model Payment {
+  id              Int         @id @default(autoincrement())
+  appointmentId   Int         @unique
+  userId          String?
+  amount          Float
+  status          String      @default("PENDING")
+  proofUrl        String?
+  approvedBy      String?
+  approvedAt      DateTime?
+  rejectedReason  String?
+  rejectedAt      DateTime?
+
+  extractedDate        DateTime?
+  extractedAmount      Float?
+  extractedReference   String?
+  extractedSenderName  String?
+  extractedSenderBank  String?
+  confidence           Float?
+
+  createdAt       DateTime    @default(now())
+  updatedAt       DateTime    @updatedAt
+
+  appointment Appointment @relation(fields: [appointmentId], references: [id], onDelete: Cascade)
+  user         User?      @relation(fields: [userId], references: [id])
+}
+
+model PatientFile {
+  id        Int      @id @default(autoincrement())
+  patientId String
+  type      String
+  filename  String
+  url       String
+  expiresAt DateTime
+  createdAt DateTime @default(now())
+
+  patient Patient @relation(fields: [patientId], references: [phone], onDelete: Cascade)
+
+  @@index([patientId])
+  @@index([expiresAt])
+}