From 4450776826dcc2ac83164e1dbdf84a48e561b0ce Mon Sep 17 00:00:00 2001
From: Zaid Marzguioui <zaid.marzguioui@outlook.de>
Date: Tue, 31 Mar 2026 22:47:55 +0200
Subject: [PATCH] fix(i18n): add next-intl middleware for locale routing
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The middleware was deleted in the Next.js 16 upgrade but is still required
by next-intl to handle locale detection and URL rewriting. Without it,
/auth/sign-in can't resolve to [locale=de]/auth/sign-in → 404.

Uses createMiddleware from next-intl/middleware with the shared routing config.
---
 Dockerfile             |  2 +-
 apps/web/middleware.ts | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 apps/web/middleware.ts

diff --git a/Dockerfile b/Dockerfile
index 0e87096d2..7eb92fcc9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ WORKDIR /app
 
 # --- Install + Build in one stage ---
 FROM base AS builder
-ARG CACHE_BUST=3
+ARG CACHE_BUST=4
 COPY . .
 RUN pnpm install --no-frozen-lockfile
 ENV NEXT_TELEMETRY_DISABLED=1
diff --git a/apps/web/middleware.ts b/apps/web/middleware.ts
new file mode 100644
index 000000000..1e1fff1de
--- /dev/null
+++ b/apps/web/middleware.ts
@@ -0,0 +1,15 @@
+import createMiddleware from 'next-intl/middleware';
+
+import { routing } from '@kit/i18n/routing';
+
+export default createMiddleware(routing);
+
+export const config = {
+  matcher: [
+    // Match all pathnames except:
+    // - API routes (/api/...)
+    // - Next.js internals (/_next/...)
+    // - Static files with extensions
+    '/((?!api|_next|.*\\..*).*)',
+  ],
+};