feat: replace quota input with amount-first UI and atomic quota adjustment

- 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

model/user.go

@@ -523,7 +523,6 @@ func (user *User) Edit(updatePassword bool) error {
 		"username":     newUser.Username,
 		"display_name": newUser.DisplayName,
 		"group":        newUser.Group,
-		"quota":        newUser.Quota,
 		"remark":       newUser.Remark,
 	}
 	if updatePassword {
@@ -896,7 +895,7 @@ func increaseUserQuota(id int, quota int) (err error) {
 	return err
 }
 
-func DecreaseUserQuota(id int, quota int) (err error) {
+func DecreaseUserQuota(id int, quota int, db bool) (err error) {
 	if quota < 0 {
 		return errors.New("quota 不能为负数！")
 	}
@@ -906,7 +905,7 @@ func DecreaseUserQuota(id int, quota int) (err error) {
 			common.SysLog("failed to decrease user quota: " + err.Error())
 		}
 	})
-	if common.BatchUpdateEnabled {
+	if !db && common.BatchUpdateEnabled {
 		addNewRecord(BatchUpdateTypeUserQuota, id, -quota)
 		return nil
 	}
@@ -928,7 +927,7 @@ func DeltaUpdateUserQuota(id int, delta int) (err error) {
 	if delta > 0 {
 		return IncreaseUserQuota(id, delta, false)
 	} else {
-		return DecreaseUserQuota(id, -delta)
+		return DecreaseUserQuota(id, -delta, false)
 	}
 }