feat(account): add daily/weekly periodic quota limits for API Key accounts

Extend the existing total quota limit with daily and weekly periodic
dimensions. Each dimension is independently configurable and uses lazy
reset — when the period expires, usage is automatically reset to zero on
the next increment. Any dimension exceeding its limit will pause the
account from scheduling.

Backend:
- Add GetQuotaDailyLimit/Used, GetQuotaWeeklyLimit/Used, HasAnyQuotaLimit
- Rewrite IncrementQuotaUsed with atomic CTE SQL for 3-dimension update
- Rewrite ResetQuotaUsed to clear all dimensions and period timestamps
- Update postUsageBilling to use HasAnyQuotaLimit()
- Preserve daily/weekly used values on account edit

Frontend:
- Refactor QuotaLimitCard from single v-model to 3-dimension props
- Add QuotaBadge component for compact D/W/$ display
- Update AccountCapacityCell with per-dimension badges
- Update Create/Edit modals with daily/weekly quota fields
- Update AccountActionMenu hasQuotaLimit to check all dimensions
- Add i18n strings for daily/weekly/total quota labels

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/components/admin/account/AccountActionMenu.vue

@@ -76,10 +76,11 @@ const isRateLimited = computed(() => {
 })
 const isOverloaded = computed(() => props.account?.overload_until && new Date(props.account.overload_until) > new Date())
 const hasQuotaLimit = computed(() => {
-  return props.account?.type === 'apikey' &&
-    props.account?.quota_limit !== undefined &&
-    props.account?.quota_limit !== null &&
-    props.account?.quota_limit > 0
+  return props.account?.type === 'apikey' && (
+    (props.account?.quota_limit ?? 0) > 0 ||
+    (props.account?.quota_daily_limit ?? 0) > 0 ||
+    (props.account?.quota_weekly_limit ?? 0) > 0
+  )
 })
 
 const handleKeydown = (event: KeyboardEvent) => {