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/common-settings/developer-tools/DevelopTools.tsx

@@ -58,7 +58,8 @@ export function DeveloperTools({ requestClose }: DeveloperToolsProps) {
 
   const submitAccountData: AccountDataSubmitCallback = useCallback(
     async (type, content) => {
-      await mx.setRoomAccountData(room.roomId, type, content);
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      await mx.setRoomAccountData(room.roomId, type as any, content);
     },
     [mx, room.roomId],
   );