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feat(notify): add balance low & account quota notification system

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- User balance low notification: email alert when balance drops below
  configurable threshold (user email + verified extra emails)
- Account quota notification: broadcast email to admin-configured
  recipients when daily/weekly/total quota usage exceeds alert threshold
- Admin settings: global enable/disable, default threshold, quota
  notification email list (Email Settings tab)
- User profile: enable/disable, custom threshold, add/remove extra
  notification emails with verification code flow
- Account quota: per-dimension alert toggle and threshold in quota
  control card
- Trigger logic: first-crossing only (old >= threshold && new < threshold
  for balance; old < threshold && new >= threshold for quota), naturally
  prevents duplicate notifications without Redis dedup
This commit is contained in:
erio
2026-04-12 02:48:57 +08:00
parent 60b0fa81ec
commit b32d1a2c9f
47 changed files with 2375 additions and 121 deletions
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9
backend/internal/service/domain_constants.go
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@@ -250,9 +250,12 @@ const (
// SettingKeyEnableCCHSigning 是否对 billing header 中的 cch 进行 xxHash64 签名（默认 false）
SettingKeyEnableCCHSigning = "enable_cch_signing"
// Web Search Emulation
// SettingKeyWebSearchEmulationConfig 全局 web search 模拟配置（JSON）
SettingKeyWebSearchEmulationConfig = "web_search_emulation_config"
// Balance Low Notification
SettingKeyBalanceLowNotifyEnabled = "balance_low_notify_enabled" // 全局开关
SettingKeyBalanceLowNotifyThreshold = "balance_low_notify_threshold" // 默认阈值（USD）
// Account Quota Notification
SettingKeyAccountQuotaNotifyEmails = "account_quota_notify_emails" // 管理员通知邮箱列表（JSON 数组）
)
// AdminAPIKeyPrefix is the prefix for admin API keys (distinct from user "sk-" keys).