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/create-chat/CreateChat.tsx

@@ -43,8 +43,8 @@ export function CreateChat({ defaultUserId }: CreateChatProps) {
 
         return result.room_id;
       },
-      [mx]
-    )
+      [mx],
+    ),
   );
   const loading = createState.status === AsyncStatus.Loading;
   const error = createState.status === AsyncStatus.Error ? createState.error : undefined;
@@ -126,7 +126,7 @@ export function CreateChat({ defaultUserId }: CreateChatProps) {
             <b>
               {error instanceof MatrixError && error.name === ErrorCode.M_LIMIT_EXCEEDED
                 ? `Server rate-limited your request for ${millisecondsToMinutes(
-                    (error.data.retry_after_ms as number | undefined) ?? 0
+                    (error.data.retry_after_ms as number | undefined) ?? 0,
                   )} minutes!`
                 : error.message}
             </b>