feat(backend): add kiro account support

backend/internal/service/account_usage_service.go

@@ -103,10 +103,17 @@ type antigravityUsageCache struct {
 	timestamp time.Time
 }
 
+// kiroUsageCache 缓存 Kiro 额度快照
+type kiroUsageCache struct {
+	usageInfo *UsageInfo
+	timestamp time.Time
+}
+
 const (
 	apiCacheTTL             = 3 * time.Minute
 	apiErrorCacheTTL        = 1 * time.Minute        // 负缓存 TTL：429 等错误缓存 1 分钟
 	antigravityErrorTTL     = 1 * time.Minute        // Antigravity 错误缓存 TTL（可恢复错误）
+	kiroUsageErrorTTL       = 1 * time.Minute        // Kiro 错误缓存 TTL（可恢复错误）
 	apiQueryMaxJitter       = 800 * time.Millisecond // 用量查询最大随机延迟
 	windowStatsCacheTTL     = 1 * time.Minute
 	openAIProbeCacheTTL     = 10 * time.Minute
@@ -118,8 +125,10 @@ type UsageCache struct {
 	apiCache          sync.Map           // accountID -> *apiUsageCache
 	windowStatsCache  sync.Map           // accountID -> *windowStatsCache
 	antigravityCache  sync.Map           // accountID -> *antigravityUsageCache
+	kiroUsageCache    sync.Map           // accountID -> *kiroUsageCache
 	apiFlight         singleflight.Group // 防止同一账号的并发请求击穿缓存（Anthropic）
 	antigravityFlight singleflight.Group // 防止同一 Antigravity 账号的并发请求击穿缓存
+	kiroUsageFlight   singleflight.Group // 防止同一 Kiro 账号的并发请求击穿缓存
 	openAIProbeCache  sync.Map           // accountID -> time.Time
 }
 
@@ -176,6 +185,23 @@ type AICredit struct {
 	MinimumBalance float64 `json:"minimum_balance,omitempty"`
 }
 
+// KiroCreditProgress 表示 Kiro 主额度或 Bonus 的用量进度。
+type KiroCreditProgress struct {
+	CurrentUsage   float64    `json:"current_usage"`
+	UsageLimit     float64    `json:"usage_limit"`
+	PercentageUsed float64    `json:"percentage_used"`
+	DaysRemaining  int        `json:"days_remaining,omitempty"`
+	ExpiryDate     *time.Time `json:"expiry_date,omitempty"`
+}
+
+// KiroOverageInfo 表示 Kiro 账号的 overage 状态。
+type KiroOverageInfo struct {
+	CurrentOverages float64 `json:"current_overages"`
+	OverageCharges  float64 `json:"overage_charges"`
+	CurrencyCode    string  `json:"currency_code,omitempty"`
+	CurrencySymbol  string  `json:"currency_symbol,omitempty"`
+}
+
 // UsageInfo 账号使用量信息
 type UsageInfo struct {
 	Source             string         `json:"source,omitempty"`               // "passive" or "active"
@@ -203,6 +229,21 @@ type UsageInfo struct {
 	// Antigravity AI Credits 余额
 	AICredits []AICredit `json:"ai_credits,omitempty"`
 
+	// Kiro Credits 额度与 overage 信息
+	KiroSubscriptionName string              `json:"kiro_subscription_name,omitempty"`
+	KiroSubscriptionType string              `json:"kiro_subscription_type,omitempty"`
+	KiroResetAt          *time.Time          `json:"kiro_reset_at,omitempty"`
+	KiroOveragesEnabled  bool                `json:"kiro_overages_enabled,omitempty"`
+	KiroCredit           *KiroCreditProgress `json:"kiro_credit,omitempty"`
+	KiroBonus            *KiroCreditProgress `json:"kiro_bonus,omitempty"`
+	KiroOverage          *KiroOverageInfo    `json:"kiro_overage,omitempty"`
+	KiroQuotaState       string              `json:"kiro_quota_state,omitempty"`
+	KiroQuotaReason      string              `json:"kiro_quota_reason,omitempty"`
+	KiroQuotaResetAt     *time.Time          `json:"kiro_quota_reset_at,omitempty"`
+	KiroRuntimeState     string              `json:"kiro_runtime_state,omitempty"`
+	KiroRuntimeReason    string              `json:"kiro_runtime_reason,omitempty"`
+	KiroRuntimeResetAt   *time.Time          `json:"kiro_runtime_reset_at,omitempty"`
+
 	// Antigravity 废弃模型转发规则 (old_model_id -> new_model_id)
 	ModelForwardingRules map[string]string `json:"model_forwarding_rules,omitempty"`
 
@@ -266,6 +307,7 @@ type AccountUsageService struct {
 	cache                   *UsageCache
 	identityCache           IdentityCache
 	tlsFPProfileService     *TLSFingerprintProfileService
+	kiroCooldownStore       KiroCooldownStore
 }
 
 // NewAccountUsageService 创建AccountUsageService实例
@@ -291,6 +333,13 @@ func NewAccountUsageService(
 	}
 }
 
+func (s *AccountUsageService) SetKiroCooldownStore(store KiroCooldownStore) *AccountUsageService {
+	if s != nil {
+		s.kiroCooldownStore = store
+	}
+	return s
+}
+
 // GetUsage 获取账号使用量
 // OAuth账号: 调用Anthropic API获取真实数据（需要profile scope），API响应缓存10分钟，窗口统计缓存1分钟
 // Setup Token账号: 根据session_window推算5h窗口，7d数据不可用（没有profile scope）
@@ -317,6 +366,10 @@ func (s *AccountUsageService) GetUsage(ctx context.Context, accountID int64) (*U
 		return usage, err
 	}
 
+	if account.Platform == PlatformKiro && account.Type == AccountTypeOAuth {
+		return s.getKiroUsage(ctx, account, "active", false)
+	}
+
 	// Antigravity 平台：使用 AntigravityQuotaFetcher 获取额度
 	if account.Platform == PlatformAntigravity {
 		usage, err := s.getAntigravityUsage(ctx, account)
@@ -425,6 +478,13 @@ func (s *AccountUsageService) GetPassiveUsage(ctx context.Context, accountID int
 		return nil, fmt.Errorf("get account failed: %w", err)
 	}
 
+	if account.Platform == PlatformKiro {
+		if account.Type != AccountTypeOAuth {
+			return nil, fmt.Errorf("passive usage only supported for Kiro OAuth accounts")
+		}
+		return s.getKiroUsage(ctx, account, "passive", false)
+	}
+
 	if !account.IsAnthropicOAuthOrSetupToken() {
 		return nil, fmt.Errorf("passive usage only supported for Anthropic OAuth/SetupToken accounts")
 	}