feat: integrate feedback module

proxy.ts

@@ -0,0 +1,66 @@
+import createMiddleware from 'next-intl/middleware';
+import { NextResponse, NextRequest } from 'next/server';
+
+// Create the internationalization middleware
+const intlMiddleware = createMiddleware({
+  // A list of all locales that are supported
+  locales: ['en', 'de'],
+
+  // Used when no locale matches
+  defaultLocale: 'en',
+});
+
+export default function middleware(request: NextRequest) {
+  const { method, url, headers } = request;
+
+  // Build header object for logging
+  const headerObj: Record<string, string> = {};
+  headers.forEach((value, key) => {
+    headerObj[key] = value;
+  });
+
+  // Defensive URL correction for internal container leakage (0.0.0.0, klz-app, localhost)
+  // This prevents hydration mismatches and host poisoning in generated links/metadata.
+  const urlObj = new URL(url);
+  const internalHosts = ['0.0.0.0', 'klz-app', 'localhost', '127.0.0.1'];
+
+  let effectiveRequest = request;
+  if (internalHosts.includes(urlObj.hostname)) {
+    const proto = headers.get('x-forwarded-proto') || 'https';
+    // Prioritize x-forwarded-host (passed by Traefik) over the local Host header
+    const hostHeader =
+      headers.get('x-forwarded-host') || headers.get('host') || 'testing.klz-cables.com';
+    const [publicHostname] = hostHeader.split(':');
+
+    urlObj.protocol = proto;
+    // urlObj.hostname = publicHostname; // Don't rewrite hostname yet as it breaks internal fetches in dev
+    // urlObj.port = ''; // DON'T clear internal port (3000) anymore
+
+    effectiveRequest = new NextRequest(urlObj, {
+      headers: request.headers,
+      method: request.method,
+      body: request.body,
+    });
+
+    console.log(
+      `🛡️ Middleware: Fixed internal URL leak: ${url} -> ${urlObj.toString()} | Proto: ${proto} | Host: ${hostHeader}`,
+    );
+  }
+
+  try {
+    // Apply internationalization middleware
+    const response = intlMiddleware(effectiveRequest);
+    return response;
+  } catch (error) {
+    console.error(
+      `Request failed: method=${method} url=${url} headers=${JSON.stringify(headerObj)}`,
+      error,
+    );
+    throw error;
+  }
+}
+
+export const config = {
+  // Match only internationalized pathnames
+  matcher: ['/((?!api|_next|_vercel|stats|errors|health|.*\\..*).*)', '/', '/(de|en)/:path*'],
+};