auto-claude: subtask-1-1 - Create Supabase middleware client utility

src/lib/supabase/middleware.ts

@@ -0,0 +1,25 @@
+import { createServerClient } from '@supabase/ssr';
+import { NextRequest, NextResponse } from 'next/server';
+
+export function createClient(request: NextRequest, response: NextResponse) {
+  return createServerClient(
+    process.env.NEXT_PUBLIC_SUPABASE_URL!,
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
+    {
+      cookies: {
+        getAll() {
+          return request.cookies.getAll();
+        },
+        setAll(cookiesToSet) {
+          try {
+            cookiesToSet.forEach(({ name, value, options }) => {
+              response.cookies.set(name, value, options);
+            });
+          } catch {
+            // Handle middleware context
+          }
+        },
+      },
+    }
+  );
+}