deepthi hotfix for 3345

[deepthikannan]

Description

Related PRS (if any):

This frontend PR is related to the #3345 PR.
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Main changes explained:

• LeaderBoard.jsx: Dynamic 0.75 screen width check introduced.
  …

How to test:

1. check into current branch
2. do npm install and ... to run this PR locally
3. Clear site data/cache
4. log as admin user/ owner user
5. go to dashboard→ leaderboard
6. verify function “A” (feel free to include screenshot here)
7. verify the headers are displayed in abbreviations, and numbers under each time column stay on a single line without wrapping at half screen size and below.

Screenshots or videos of changes:

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