feat: global error fallback and e2e (#91)

* fix(ui): add global route fallback with error toast and retry

* test(e2e): cover cloud accounts error fallback UI

package-lock.json

@@ -60,6 +60,7 @@
         "lucide-react": "^0.553.0",
         "react": "^19.2.0",
         "react-dom": "^19.2.0",
+        "react-error-boundary": "^6.1.0",
         "react-i18next": "^16.2.4",
         "reflect-metadata": "^0.2.2",
         "rxjs": "^7.8.2",
@@ -26393,6 +26394,15 @@
         "react": "^19.2.0"
       }
     },
+    "node_modules/react-error-boundary": {
+      "version": "6.1.0",
+      "resolved": "https://registry.npmmirror.com/react-error-boundary/-/react-error-boundary-6.1.0.tgz",
+      "integrity": "sha512-02k9WQ/mUhdbXir0tC1NiMesGzRPaCsJEWU/4bcFrbY1YMZOtHShtZP6zw0SJrBWA/31H0KT9/FgdL8+sPKgHA==",
+      "license": "MIT",
+      "peerDependencies": {
+        "react": "^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/react-i18next": {
       "version": "16.3.5",
       "resolved": "https://registry.npmjs.org/react-i18next/-/react-i18next-16.3.5.tgz",