feat: add all application source code

- apps/api: FastAPI backend with Dockerfile
- apps/web: Next.js frontend with Dockerfile
- apps/sensor: Signal collection agent
- packages: shared packages

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

apps/web/src/middleware.ts

@@ -0,0 +1,12 @@
+import createMiddleware from 'next-intl/middleware'
+import { routing } from './i18n/routing'
+
+export default createMiddleware(routing)
+
+export const config = {
+  // 匹配所有路徑，除了以下例外:
+  // - api 路由
+  // - _next 靜態檔案
+  // - 靜態資源 (images, fonts, etc.)
+  matcher: ['/((?!api|_next|_vercel|.*\\..*).*)'],
+}