chore: upgrade TypeScript 4.9 to 5.9, ESLint 8.29 to 8.57, @typescript-eslint 5 to 7

Resolves all TS2345/TS2347/TS7006 type errors introduced by stricter TypeScript 5.x.
Fix Icons.Settings to Icons.Setting, cast account data returns, fix implicit any.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/features/settings/emojis-stickers/GlobalPacks.tsx

@@ -1,3 +1,4 @@
+import { MatrixEvent } from 'matrix-js-sdk';
 import React, { MouseEventHandler, useCallback, useEffect, useMemo, useState } from 'react';
 import {
   Box,
@@ -303,7 +304,9 @@ export function GlobalPacks({ onViewPack }: GlobalPacksProps) {
   const [applyState, applyChanges] = useAsyncCallback(
     useCallback(async () => {
       const content =
-        mx.getAccountData(AccountDataEvent.PoniesEmoteRooms)?.getContent<EmoteRoomsContent>() ?? {};
+        (
+          (mx as any).getAccountData(AccountDataEvent.PoniesEmoteRooms) as MatrixEvent | undefined
+        )?.getContent<EmoteRoomsContent>() ?? {};
       const updatedContent: EmoteRoomsContent = JSON.parse(JSON.stringify(content));
 
       selectedPacks.forEach((addr) => {
@@ -320,7 +323,7 @@ export function GlobalPacks({ onViewPack }: GlobalPacksProps) {
         }
       });
 
-      await mx.setAccountData(AccountDataEvent.PoniesEmoteRooms, updatedContent);
+      await (mx as any).setAccountData(AccountDataEvent.PoniesEmoteRooms, updatedContent);
     }, [mx, selectedPacks, removedPacks]),
   );