fix: use correct /api/auth/me endpoint for coffee page user detection

src/app/coffee/page.tsx

@@ -54,8 +54,13 @@ export default function CoffeePage() {
         if (!res.ok) throw new Error('Failed to load menu');
         return res.json();
       }),
-      fetch('/api/auth/session').then(async (res) => {
-        if (res.ok) return res.json();
+      fetch('/api/auth/me').then(async (res) => {
+        if (res.ok) {
+          const data = await res.json();
+          if (data.authenticated && data.id) {
+            return { user: { id: data.id, username: data.username, role: data.role, first_name: data.first_name, last_name: data.last_name } };
+          }
+        }
         return { user: null };
       }),
       fetch('/api/rooms').then(async (res) => {