- Refactor token, redemption, and user quota inputs to prioritize monetary
amount entry, with raw quota input collapsed by default
- Add atomic quota adjustment modal for users with add/subtract/override modes,
bypassing batch update queue for immediate DB consistency
- Make user quota fields readonly in edit form; all modifications go through
the dedicated adjust-quota modal via POST /api/user/manage
- Add DecreaseUserQuota `db` parameter for direct DB writes, matching
IncreaseUserQuota behavior
- Support negative quota display in amount conversion helpers
- Add i18n keys for all new UI strings across all locales
