feat: detect duplicates in csv

web/delivery-log.html

@@ -90,7 +90,7 @@
     <div class="mt-auto pt-3" style="border-top:1px solid var(--border);">
       <div class="nav-link-custom" style="cursor:default;">
         <i class="fa-solid fa-circle-user fa-fw"></i>
-        <span style="font-size:0.82rem;">Admin</span>
+        <span class="nav-username" style="font-size:0.82rem;">User</span>
       </div>
     </div>
   </div>
@@ -245,12 +245,21 @@
     loadLog();
   </script>
   <script>
-    (async function () {
+    async function checkAuth() {
       try {
-        const d = await fetch('/api/admin.php').then(r => r.json());
+        const r = await fetch('/api/admin.php', { redirect: 'manual' });
+        if (r.type === 'opaqueredirect' || !r.ok) { window.location.reload(); return; }
+        const d = await r.json();
         document.getElementById('sandboxBanner').style.display = d.sandbox_mode ? '' : 'none';
+        document.querySelectorAll('.admin-nav-link').forEach(el => el.classList.toggle('d-none', !d.is_admin));
+        const name = d.name || d.username;
+        if (name) {
+          document.querySelectorAll('.nav-username').forEach(el => { el.textContent = name; });
+        }
       } catch { }
-    }());
+    }
+    checkAuth();
+    document.addEventListener('visibilitychange', () => { if (document.visibilityState === 'visible') checkAuth(); });
   </script>
 </body>