refactor: full codebase overhaul — dead code removal, env validation, logger migration, date consolidation, Prisma schema cleanup, button consistency, useEffect deps, test coverage

- env.ts: added 10 missing Zod-validated env vars (imager, paypal currency, argon2/bcrypt params)
- Migrated 6 modules from process.env to validated env.* (auth, proxy-auth, paypal, password, redis, imager, moderation, alert, logger)
- Replaced console.warn/error with pino logger in 9 server-side modules
- Removed 50+ dead exports (SWF wrappers, coalesceHotelName, signIn, isStaff re-export, formatTimestamp, Skeleton/SkeletonCard, 4 unused housekeeping sections)
- Consolidated date formatting: 28 files migrated to shared formatDate() from @/lib/format-date
- Wired 4 radio/settings API routes through cached siteSettings service instead of raw Prisma queries
- Added getMany()/getAll() helpers to SiteSettings service
- Removed 88 dead Prisma model definitions (schema 2763→1846 lines)
- Created admin action-helper.ts with wrapAction() for standardized error handling
- Fixed useEffect dependency arrays in 4 data-heavy components
- Replaced raw btn CSS classes with shadcn Button component across admin pages
- Stripped dead i18n namespaces (common, pages.client) from all 22 translation files
- Removed 2 dead scripts (create-release.sh, check-local-imports.ts)
- Fixed knip.json configuration
- Added 7 new test suites: format-date, paypal, moderation, alert, webhook, action-helper, and fixed password.test.ts for env mocking
- All 358 tests passing across 72 test files
- TypeScript: 0 errors

package.json

@@ -68,7 +68,7 @@
 		"next-auth": "5.0.0-beta.32",
 		"next-intl": "^4.13.3",
 		"next-view-transitions": "^0.3.5",
-		"nodemailer": "^7.0.13",
+		"nodemailer": "^9.0.0",
 		"otplib": "^13.4.1",
 		"pino": "^10.3.1",
 		"react": "^19.2.8",
@@ -94,12 +94,11 @@
 		"@tailwindcss/typography": "^0.5.20",
 		"@types/bcrypt": "^6.0.0",
 		"@types/node": "^26.1.1",
-		"@types/nodemailer": "^7.0.12",
+		"@types/nodemailer": "^8.0.0",
 		"@types/react": "^19.2.17",
 		"@types/react-dom": "^19.2.3",
 		"@types/sanitize-html": "^2.16.1",
-		"babel-plugin-react-compiler": "^1.0.0",
-		"dotenv": "^16.4.0",
+		"dotenv": "^17.0.0",
 		"eslint": "^10.7.0",
 		"eslint-plugin-unused-imports": "^4.4.1",
 		"husky": "^9.1.7",
@@ -109,7 +108,7 @@
 		"prisma": "^7.9.0",
 		"tailwindcss": "^4.3.3",
 		"tsx": "^4.23.1",
-		"typescript": "^5.9.3",
+		"typescript": "^7.0.0",
 		"typescript-eslint": "^8.65.0",
 		"vite": "^8.1.5",
 		"vitest": "^4.1.10"