Add Notifications link to User Management page

- Add quick access button to notification settings in user management header
- Styled to match existing UI gradient theme
- Provides easy navigation from user management to notification configuration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/admin/users/page.tsx

@@ -234,15 +234,24 @@ export default function UsersPage() {
             <h2 className="text-4xl font-bold text-white mb-2">User Management</h2>
             <p className="text-violet-100 text-lg">Verwalte Benutzerkonten und Berechtigungen</p>
           </div>
-          <button
-            onClick={() => {
-              setFormData({ username: "", email: "", password: "", role: "VIEWER" });
-              setShowAddModal(true);
-            }}
-            className="px-6 py-3 bg-white text-violet-700 rounded-xl hover:bg-violet-50 font-semibold shadow-lg hover:shadow-xl transition-all transform hover:-translate-y-0.5"
-          >
-            + Add User
-          </button>
+          <div className="flex gap-3">
+            <a
+              href="/admin/settings/notifications"
+              className="px-6 py-3 bg-violet-500 text-white rounded-xl hover:bg-violet-600 font-semibold shadow-lg hover:shadow-xl transition-all transform hover:-translate-y-0.5 flex items-center gap-2"
+            >
+              <span>📱</span>
+              <span>Notifications</span>
+            </a>
+            <button
+              onClick={() => {
+                setFormData({ username: "", email: "", password: "", role: "VIEWER" });
+                setShowAddModal(true);
+              }}
+              className="px-6 py-3 bg-white text-violet-700 rounded-xl hover:bg-violet-50 font-semibold shadow-lg hover:shadow-xl transition-all transform hover:-translate-y-0.5"
+            >
+              + Add User
+            </button>
+          </div>
         </div>
       </div>