[FEATURE]: [GSSoC26] feat: Show scroll progress bar on /quiz pages

[Prasad-Pitke]

Feature Description

ProgressBar.tsx currently only renders the scroll progress bar when pathname.startsWith('/sem'). Quiz pages (/quiz/[slug]) can be long but have no progress indicator.

[Prasad-Pitke]

I would like to work on this documentation consistency issue under GSSoC'26.
please assign it to me. Thankyou !!!