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/room/message/ForwardMessageDialog.tsx

@@ -39,7 +39,8 @@ export function ForwardMessageDialog({ mEvent, onClose }: Props) {
   const forward = (roomId: string, roomName: string) => {
     const fwdContent: Record<string, unknown> = { ...mEvent.getContent() };
     delete fwdContent['m.relates_to'];
-    mx.sendEvent(roomId, mEvent.getType(), fwdContent as any);
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    (mx as any).sendEvent(roomId, mEvent.getType(), fwdContent);
     setSentTo(roomName);
     setTimeout(onClose, 1200);
   };