Add "SPRINTER" Gamification Badge to User Profile

[jagdish-15]

We are expanding the gamification system on user profiles! We need to implement a new "SPRINTER" badge that unlocks dynamically based on a user's progress.

Badge Name: [SPRINTER]

Unlock Condition: The user solved 7 or more problems (of any difficulty) in a single 24-hour period (comparing today's snapshot to yesterday's snapshot).

Implementation Steps

This is a purely frontend feature. All logic belongs in frontend/js/user/badges.js and CSS styling in frontend/user.html.

1. Add the badge object to the ALL_BADGES array.
2. Write the evaluation logic inside the loadBadges() function to check the user's history data. If the condition is met, add the ID to the earnedSet.
3. Add a visually distinct CSS class (e.g. bright yellow/electric theme) for the badge in frontend/user.html.

[Yashaswini-K-P]

i would like to work on this