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/features/call/CallMemberCard.tsx

@@ -34,7 +34,7 @@ export function CallMemberCard({ member }: CallMemberCardProps) {
   const name = getMemberDisplayName(room, userId) ?? getMxIdLocalPart(userId) ?? userId;
   const avatarMxc = getMemberAvatarMxc(room, userId);
   const avatarUrl = avatarMxc
-    ? mxcUrlToHttp(mx, avatarMxc, useAuthentication, 96, 96) ?? undefined
+    ? (mxcUrlToHttp(mx, avatarMxc, useAuthentication, 96, 96) ?? undefined)
     : undefined;
 
   const audioOnly =
@@ -53,7 +53,7 @@ export function CallMemberCard({ member }: CallMemberCardProps) {
           undefined,
           userId,
           getMouseEventCords(evt.nativeEvent),
-          'Right'
+          'Right',
         )
       }
     >