Rename daily quiz to check-in and add collapsible journal calendar.

Replace user-facing quiz wording with daily check-in, add journal history on the Bit page with month browsing and read-only entry modals, and keep legacy quiz routes redirecting to the new anchor.

app/(app)/daily/quiz/page.tsx

@@ -3,5 +3,5 @@ import { redirect } from "next/navigation";
 import { routes } from "@/lib/routes";
 
 export default function DailyQuizPage() {
-  redirect(`${routes.avatar}#bit-daily-quiz`);
+  redirect(`${routes.avatar}#bit-daily-check-in`);
 }