feat: sase.tr v2 full application implementation

Complete rewrite of sase.tr VIN lookup platform with modern stack:

Backend (NestJS 10 + Drizzle ORM + PostgreSQL + Redis + BullMQ):
- 34 DB models (core + PL24 + EMEX schemas)
- Auth via Better Auth (email/password + social)
- Brands, Plans, Subscriptions, Payments (iyzico + EFT)
- VIN decode orchestration (Corgi + PL24 + EMEX + NHTSA)
- Interactive schema viewer backend (MinIO storage)
- EMEX scraping integration (Puppeteer + BullMQ workers)
- Translation module (EN→TR automotive dictionary)
- Admin dashboard API (stats, user mgmt, payment approval)
- Rate limiting, Helmet security, file upload validation

Frontend (Next.js 15 + Tailwind v4 + shadcn/ui + TanStack Query + Zustand):
- 20 routes: auth, dashboard, VIN search, schema viewer, admin
- Interactive schema viewer with zoom/pan/hotspot highlighting
- Subscription management with brand selector
- Payment flow (iyzico 3D Secure + EFT with receipt upload)
- i18n support (TR/EN)
- Error boundaries, loading skeletons, 404 page

Infrastructure:
- 85 tests (52 backend + 33 frontend, Vitest)
- CI/CD (GitHub Actions: lint, typecheck, test, build, deploy)
- Zero-downtime deploy script (PM2)
- Env validation script

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/shared/src/constants/error-codes.ts

@@ -0,0 +1,39 @@
+export const ERROR_CODES = {
+  // Auth
+  INVALID_CREDENTIALS: "AUTH_001",
+  EMAIL_ALREADY_EXISTS: "AUTH_002",
+  SESSION_EXPIRED: "AUTH_003",
+  UNAUTHORIZED: "AUTH_004",
+  FORBIDDEN: "AUTH_005",
+
+  // VIN
+  INVALID_VIN: "VIN_001",
+  VIN_DECODE_FAILED: "VIN_002",
+  BRAND_NOT_SUPPORTED: "VIN_003",
+
+  // Subscription
+  NO_ACTIVE_SUBSCRIPTION: "SUB_001",
+  BRAND_ACCESS_DENIED: "SUB_002",
+  INVALID_BRAND_COUNT: "SUB_003",
+  SUBSCRIPTION_ALREADY_ACTIVE: "SUB_004",
+
+  // Payment
+  PAYMENT_FAILED: "PAY_001",
+  IYZICO_ERROR: "PAY_002",
+  EFT_RECEIPT_REQUIRED: "PAY_003",
+  PAYMENT_ALREADY_PROCESSED: "PAY_004",
+
+  // General
+  NOT_FOUND: "GEN_001",
+  VALIDATION_ERROR: "GEN_002",
+  INTERNAL_ERROR: "GEN_003",
+  RATE_LIMITED: "GEN_004",
+  CONFLICT: "GEN_005",
+
+  // Integration
+  PL24_ERROR: "INT_001",
+  EMEX_ERROR: "INT_002",
+  CORGI_ERROR: "INT_003",
+} as const;
+
+export type ErrorCode = (typeof ERROR_CODES)[keyof typeof ERROR_CODES];

packages/shared/src/constants/plans.ts

@@ -0,0 +1,33 @@
+export const PLANS = {
+  SINGLE: {
+    name: "1 Marka",
+    brandCount: 1,
+    priceMonthly: 200_00,
+    priceYearly: 2000_00,
+  },
+  DOUBLE: {
+    name: "2 Marka",
+    brandCount: 2,
+    priceMonthly: 350_00,
+    priceYearly: 3500_00,
+  },
+  TRIPLE: {
+    name: "3 Marka",
+    brandCount: 3,
+    priceMonthly: 500_00,
+    priceYearly: 5000_00,
+  },
+  FULL: {
+    name: "Full Paket",
+    brandCount: 0,
+    priceMonthly: 999_00,
+    priceYearly: 9990_00,
+  },
+} as const;
+
+export const REFERRAL_REWARDS = {
+  TIER_1: { count: 3, extensionDays: 7 },
+  TIER_2: { count: 5, extensionDays: 30 },
+} as const;
+
+export const CURRENCY = "TRY" as const;

packages/shared/src/constants/regex.ts

@@ -0,0 +1,5 @@
+export const VIN_REGEX = /^[A-HJ-NPR-Z0-9]{17}$/;
+
+export const EMAIL_REGEX = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+
+export const OEM_CODE_REGEX = /^[A-Z0-9\-.\s]{3,30}$/i;