Some updates

Bug fix

1. Fixed some color inconsistency issues
2. Fixed some issues where the microphone toggle was inverted from its icon

Feature

1. Added a check-in feature
2. Each check-in grants 2 EXP
   1. Currently it's just for fun and doesn't serve much purpose
   2. EXP may be used to redeem invitation codes in the future

Announcement

1. 10 invitation codes will be released this week
2. Those who obtain an invitation code agree by default to help test
3. If any frontend developers (React, etc.) wish to join the development, please send your GitHub profile or resume