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/components/message/content/PollContent.tsx

@@ -34,7 +34,7 @@ function computeVotes(
   mx: ReturnType<typeof useMatrixClient>,
   roomId: string,
   eventId: string,
-  isStable: boolean
+  isStable: boolean,
 ): VoteState {
   const empty: VoteState = { counts: new Map(), myVote: null, total: 0 };
   const room = mx.getRoom(roomId);
@@ -44,12 +44,12 @@ function computeVotes(
   const stableRels = timelineSet.relations.getChildEventsForEvent(
     eventId,
     'm.reference',
-    'm.poll.response'
+    'm.poll.response',
   );
   const unstableRels = timelineSet.relations.getChildEventsForEvent(
     eventId,
     'org.matrix.msc3381.poll.response' as any,
-    'org.matrix.msc3381.poll.response'
+    'org.matrix.msc3381.poll.response',
   );
 
   // Collect all response events; per-sender keep only latest
@@ -129,12 +129,12 @@ export function PollContent({
     const stableRels = timelineSet.relations.getChildEventsForEvent(
       eventId,
       'm.reference',
-      'm.poll.response'
+      'm.poll.response',
     );
     const unstableRels = timelineSet.relations.getChildEventsForEvent(
       eventId,
       'org.matrix.msc3381.poll.response' as any,
-      'org.matrix.msc3381.poll.response'
+      'org.matrix.msc3381.poll.response',
     );
 
     stableRels?.on(RelationsEvent.Add, refresh);