fix: add error handling to middleware to prevent INVOCATION_FAILED

- Check if Supabase env vars are configured before using them
- Wrap Supabase auth call in try/catch to prevent 500 crashes
- Graceful fallback: pass through on error instead of crashing

https://claude.ai/code/session_01H2aRGDaKgarPvhay2HxN6Y

middleware.ts

@@ -2,14 +2,37 @@ import { createServerClient } from "@supabase/ssr";
 import { NextResponse, type NextRequest } from "next/server";
 
 export async function middleware(request: NextRequest) {
-  let supabaseResponse = NextResponse.next({
-    request,
-  });
+  // Si les env vars Supabase ne sont pas configurees, laisser passer
+  const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL;
+  const supabaseAnonKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY;
 
-  const supabase = createServerClient(
-    process.env.NEXT_PUBLIC_SUPABASE_URL!,
-    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
-    {
+  if (
+    !supabaseUrl ||
+    !supabaseAnonKey ||
+    supabaseUrl.includes("your-project") ||
+    supabaseAnonKey === "your-anon-key"
+  ) {
+    // Pas de Supabase configure : rediriger les routes protegees vers login
+    const protectedPaths = ["/dashboard", "/formations", "/profil"];
+    const isProtected = protectedPaths.some((p) =>
+      request.nextUrl.pathname.startsWith(p)
+    );
+
+    if (isProtected) {
+      const url = request.nextUrl.clone();
+      url.pathname = "/login";
+      return NextResponse.redirect(url);
+    }
+
+    return NextResponse.next();
+  }
+
+  try {
+    let supabaseResponse = NextResponse.next({
+      request,
+    });
+
+    const supabase = createServerClient(supabaseUrl, supabaseAnonKey, {
       cookies: {
         getAll() {
           return request.cookies.getAll();
@@ -26,37 +49,41 @@ export async function middleware(request: NextRequest) {
           );
         },
       },
+    });
+
+    const {
+      data: { user },
+    } = await supabase.auth.getUser();
+
+    // Rediriger vers login si pas connecte et route protegee
+    if (
+      !user &&
+      (request.nextUrl.pathname.startsWith("/dashboard") ||
+        request.nextUrl.pathname.startsWith("/formations") ||
+        request.nextUrl.pathname.startsWith("/profil"))
+    ) {
+      const url = request.nextUrl.clone();
+      url.pathname = "/login";
+      return NextResponse.redirect(url);
     }
-  );
 
-  const {
-    data: { user },
-  } = await supabase.auth.getUser();
+    // Rediriger vers dashboard si deja connecte et sur login/register
+    if (
+      user &&
+      (request.nextUrl.pathname === "/login" ||
+        request.nextUrl.pathname === "/register")
+    ) {
+      const url = request.nextUrl.clone();
+      url.pathname = "/dashboard";
+      return NextResponse.redirect(url);
+    }
 
-  // Rediriger vers login si pas connecte et route protegee
-  if (
-    !user &&
-    (request.nextUrl.pathname.startsWith("/dashboard") ||
-      request.nextUrl.pathname.startsWith("/formations") ||
-      request.nextUrl.pathname.startsWith("/profil"))
-  ) {
-    const url = request.nextUrl.clone();
-    url.pathname = "/login";
-    return NextResponse.redirect(url);
+    return supabaseResponse;
+  } catch (e) {
+    console.error("Middleware error:", e);
+    // En cas d'erreur, laisser passer la requete plutot que crasher
+    return NextResponse.next();
   }
-
-  // Rediriger vers dashboard si deja connecte et sur login/register
-  if (
-    user &&
-    (request.nextUrl.pathname === "/login" ||
-      request.nextUrl.pathname === "/register")
-  ) {
-    const url = request.nextUrl.clone();
-    url.pathname = "/dashboard";
-    return NextResponse.redirect(url);
-  }
-
-  return supabaseResponse;
 }
 
 export const config = {