diff --git a/package-lock.json b/package-lock.json
index d69d2c8..cea5b52 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -42,8 +42,8 @@
         "prisma": "^6.19.2",
         "puppeteer": "^24.40.0",
         "qrcode": "^1.5.4",
-        "react": "^18.3.1",
-        "react-dom": "^18.3.1",
+        "react": "^19.2.7",
+        "react-dom": "^19.2.7",
         "react-quill-new": "^3.8.3",
         "react-router-dom": "^6.30.3",
         "zod": "^4.3.6"
@@ -58,8 +58,8 @@
         "@types/node-cron": "^3.0.11",
         "@types/nodemailer": "^7.0.11",
         "@types/qrcode": "^1.5.6",
-        "@types/react": "^18.3.31",
-        "@types/react-dom": "^18.3.7",
+        "@types/react": "^19.2.17",
+        "@types/react-dom": "^19.2.3",
         "@types/supertest": "^7.2.0",
         "@vitejs/plugin-react": "^6.0.1",
         "concurrently": "^9.2.1",
@@ -2791,23 +2791,22 @@
       }
     },
     "node_modules/@types/react": {
-      "version": "18.3.31",
-      "resolved": "https://registry.npmjs.org/@types/react/-/react-18.3.31.tgz",
-      "integrity": "sha512-vfEqpXTvwT91yhmwdfouStN2hSKwTvyRs8qpLfADyrq/kxDw0hZM7Wk9Ug1FELj8hIby+S/+kQCSRFF32nv2Qw==",
+      "version": "19.2.17",
+      "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.17.tgz",
+      "integrity": "sha512-MXfmqaVPEVgkBT/aY0aGCkRWWtByiYQXo3xdQ8r5RzuFrPiRn8Gar2tQdXSUQ2GKV3bkXckek89V8wQBY2Q/Aw==",
       "license": "MIT",
       "dependencies": {
-        "@types/prop-types": "*",
         "csstype": "^3.2.2"
       }
     },
     "node_modules/@types/react-dom": {
-      "version": "18.3.7",
-      "resolved": "https://registry.npmjs.org/@types/react-dom/-/react-dom-18.3.7.tgz",
-      "integrity": "sha512-MEe3UeoENYVFXzoXEWsvcpg6ZvlrFNlOQ7EOsvhI3CfAXwzPfO8Qwuxd40nepsYKqyyVQnTdEfv68q91yLcKrQ==",
+      "version": "19.2.3",
+      "resolved": "https://registry.npmjs.org/@types/react-dom/-/react-dom-19.2.3.tgz",
+      "integrity": "sha512-jp2L/eY6fn+KgVVQAOqYItbF0VY/YApe5Mz2F0aykSO8gx31bYCZyvSeYxCHKvzHG5eZjc+zyaS5BrBWya2+kQ==",
       "dev": true,
       "license": "MIT",
       "peerDependencies": {
-        "@types/react": "^18.0.0"
+        "@types/react": "^19.2.0"
       }
     },
     "node_modules/@types/react-transition-group": {
@@ -7363,28 +7362,24 @@
       }
     },
     "node_modules/react": {
-      "version": "18.3.1",
-      "resolved": "https://registry.npmjs.org/react/-/react-18.3.1.tgz",
-      "integrity": "sha512-wS+hAgJShR0KhEvPJArfuPVN1+Hz1t0Y6n5jLrGQbkb4urgPE/0Rve+1kMB1v/oWgHgm4WIcV+i7F2pTVj+2iQ==",
+      "version": "19.2.7",
+      "resolved": "https://registry.npmjs.org/react/-/react-19.2.7.tgz",
+      "integrity": "sha512-HNe9WslTbXmFK8o8cmwgAeJFSBvt1bPdHCVKtaaV+WlAN36mpT4hcRpwbf3fY56ar2oIXzsBpOAiIRHAdY0OlQ==",
       "license": "MIT",
-      "dependencies": {
-        "loose-envify": "^1.1.0"
-      },
       "engines": {
         "node": ">=0.10.0"
       }
     },
     "node_modules/react-dom": {
-      "version": "18.3.1",
-      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-18.3.1.tgz",
-      "integrity": "sha512-5m4nQKp+rZRb09LNH59GM4BxTh9251/ylbKIbpe7TpGxfJ+9kv6BLkLBXIjjspbgbnIBNqlI23tRnTWT0snUIw==",
+      "version": "19.2.7",
+      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.2.7.tgz",
+      "integrity": "sha512-t0BRVXvbiE/o20Hfw669rLbMCDWtYZLvmJigy2f0MxsXF+71pxhR3xOkspmsO8h3ZlNzyibAmtCa3l4lYKk6gQ==",
       "license": "MIT",
       "dependencies": {
-        "loose-envify": "^1.1.0",
-        "scheduler": "^0.23.2"
+        "scheduler": "^0.27.0"
       },
       "peerDependencies": {
-        "react": "^18.3.1"
+        "react": "^19.2.7"
       }
     },
     "node_modules/react-is": {
@@ -7720,13 +7715,10 @@
       }
     },
     "node_modules/scheduler": {
-      "version": "0.23.2",
-      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.23.2.tgz",
-      "integrity": "sha512-UOShsPwz7NrMUqhR6t0hWjFduvOzbtv7toDH1/hIrfRNIDBnnBWd0CwJTGvTpngVlmwGCdP9/Zl/tVrDqcuYzQ==",
-      "license": "MIT",
-      "dependencies": {
-        "loose-envify": "^1.1.0"
-      }
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.27.0.tgz",
+      "integrity": "sha512-eNv+WrVbKu1f3vbYJT/xtiF5syA5HPIMtf9IgY/nKg0sWqzAUEvqY/xm7OcZc/qafLx/iO9FgOmeSAp4v5ti/Q==",
+      "license": "MIT"
     },
     "node_modules/secure-json-parse": {
       "version": "4.1.0",
diff --git a/package.json b/package.json
index 80dc4e3..bfb30df 100644
--- a/package.json
+++ b/package.json
@@ -66,8 +66,8 @@
     "prisma": "^6.19.2",
     "puppeteer": "^24.40.0",
     "qrcode": "^1.5.4",
-    "react": "^18.3.1",
-    "react-dom": "^18.3.1",
+    "react": "^19.2.7",
+    "react-dom": "^19.2.7",
     "react-quill-new": "^3.8.3",
     "react-router-dom": "^6.30.3",
     "zod": "^4.3.6"
@@ -82,8 +82,8 @@
     "@types/node-cron": "^3.0.11",
     "@types/nodemailer": "^7.0.11",
     "@types/qrcode": "^1.5.6",
-    "@types/react": "^18.3.31",
-    "@types/react-dom": "^18.3.7",
+    "@types/react": "^19.2.17",
+    "@types/react-dom": "^19.2.3",
     "@types/supertest": "^7.2.0",
     "@vitejs/plugin-react": "^6.0.1",
     "concurrently": "^9.2.1",
diff --git a/src/admin/ui/AppShell.tsx b/src/admin/ui/AppShell.tsx
index c3347c8..efa9606 100644
--- a/src/admin/ui/AppShell.tsx
+++ b/src/admin/ui/AppShell.tsx
@@ -19,7 +19,9 @@ export default function AppShell() {
   const [mobileOpen, setMobileOpen] = useState(false);
   const [loggingOut, setLoggingOut] = useState(false);
   const location = useLocation();
-  const logoutTimer = useRef<ReturnType<typeof setTimeout>>();
+  const logoutTimer = useRef<ReturnType<typeof setTimeout> | undefined>(
+    undefined,
+  );
 
   const handleLogout = useCallback(() => {
     setLoggingOut(true);