feat(F-001): scaffold Next.js 15 project with TypeScript and Tailwind

- Initialize Next.js 15 with App Router and TypeScript strict mode
- Configure Tailwind CSS with shadcn/ui theme system
- Install shadcn/ui components (button, card, input, table, etc.)
- Set up ESLint and Prettier with automatic formatting
- Configure path aliases (@/*) in tsconfig.json
- Create full project structure per CLAUDE.md
- Add health check endpoint at /api/health
- Configure next.config.ts with output: 'standalone' for Docker
- Set up Prisma with placeholder schema
- Configure Vitest (unit) and Playwright (E2E) testing
- Add VS Code settings for consistent development experience

Build verification: TypeScript compilation, ESLint, and production build all pass.

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

.gitignore

@@ -1,5 +1,53 @@
+# Dependencies
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+.pnpm-debug.log*
+
+# Environment variables
 .env
+.env*.local
+!.env.example
+
+# Next.js
+.next/
+out/
+build/
+dist/
+*.tsbuildinfo
+next-env.d.ts
+
+# Testing
+coverage/
+.nyc_output
+playwright-report/
+test-results/
+
+# Misc
+.DS_Store
+*.pem
+*.log
+
+# Traefik
 traefik/acme.json
 traefik/logs/
-*.log
-node_modules/
+
+# IDE
+.vscode/*
+!.vscode/extensions.json
+!.vscode/settings.json
+.idea/
+*.swp
+*.swo
+*~
+
+# Vercel
+.vercel
+
+# TypeScript
+*.tsbuildinfo
+
+# Turbo
+.turbo