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/i18n/locales/zh.ts

@@ -1801,11 +1801,17 @@ export default {
       resetQuota: '重置配额',
       quotaLimit: '配额限制',
       quotaLimitPlaceholder: '0 表示不限制',
-      quotaLimitHint: '设置最大使用额度（美元），达到后账号暂停调度。修改限额不会重置已用额度。',
+      quotaLimitHint: '设置日/周/总使用额度（美元），任一维度达到限额后账号暂停调度。修改限额不会重置已用额度。',
       quotaLimitToggle: '启用配额限制',
       quotaLimitToggleHint: '开启后，当账号用量达到设定额度时自动暂停调度',
-      quotaLimitAmount: '限额金额',
-      quotaLimitAmountHint: '账号最大可用额度（美元），达到后自动暂停。修改限额不会重置已用额度。',
+      quotaDailyLimit: '日限额',
+      quotaDailyLimitHint: '从首次使用起每 24 小时自动重置。',
+      quotaWeeklyLimit: '周限额',
+      quotaWeeklyLimitHint: '从首次使用起每 7 天自动重置。',
+      quotaTotalLimit: '总限额',
+      quotaTotalLimitHint: '累计消费上限，不会自动重置 — 使用「重置配额」手动清零。',
+      quotaLimitAmount: '总限额',
+      quotaLimitAmountHint: '累计消费上限，不会自动重置。',
       testConnection: '测试连接',
       reAuthorize: '重新授权',
       refreshToken: '刷新令牌',