chore: upgrade i18next 26, prettier 3, fontsource-variable, domhandler 6, lint-staged 17

- i18next 23->26 + react-i18next 15->17
- prettier 2->3, reformat all files
- replace @fontsource/inter with @fontsource-variable/inter 5, update import path
- domhandler 5->6 (aligns with transitive deps)
- lint-staged 16->17

src/app/pages/client/sidebar/UnverifiedTab.tsx

@@ -29,7 +29,7 @@ function UnverifiedIndicator() {
   const verificationStatus = useDeviceVerificationStatus(
     crypto,
     mx.getSafeUserId(),
-    currentDevice?.device_id
+    currentDevice?.device_id,
   );
   const unverified = verificationStatus === VerificationStatus.Unverified;
 
@@ -37,7 +37,7 @@ function UnverifiedIndicator() {
   const unverifiedDeviceCount = useUnverifiedDeviceCount(
     crypto,
     mx.getSafeUserId(),
-    otherDevicesId
+    otherDevicesId,
   );
 
   const [settings, setSettings] = useState(false);