chore: restore safe middleware session logic

src/middleware.ts

@@ -3,7 +3,19 @@ import { NextResponse } from 'next/server';
 import type { NextRequest } from 'next/server';
 
 export async function middleware(req: NextRequest) {
-    return NextResponse.next();
+    const res = NextResponse.next();
+
+    // Only attempt session refresh if variables are present
+    if (process.env.NEXT_PUBLIC_SUPABASE_URL && process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY) {
+        try {
+            const supabase = createMiddlewareClient({ req, res });
+            await supabase.auth.getSession();
+        } catch (e) {
+            console.error('Middleware session refresh failed:', e);
+        }
+    }
+
+    return res;
 }
 
 export const config = {