refactor(auth): replace NextRefreshAfter with NextRetryAfter for clarity and consistency

- Renamed field `NextRefreshAfter` to `NextRetryAfter` across `AuthManager`, `types`, and selector logic.
- Updated references to ensure proper handling of retry timing logic.
- Improved code readability and clarified retry behavior for different auth states.

sdk/cliproxy/auth/manager.go

@@ -523,14 +523,14 @@ func (m *Manager) MarkResult(ctx context.Context, result Result) {
 			switch statusCode {
 			case 401:
 				auth.StatusMessage = "unauthorized"
-				auth.NextRefreshAfter = now.Add(30 * time.Minute)
+				auth.NextRetryAfter = now.Add(30 * time.Minute)
 				if result.Model != "" {
 					shouldSuspendModel = true
 					suspendReason = "unauthorized"
 				}
 			case 402, 403:
 				auth.StatusMessage = "payment_required"
-				auth.NextRefreshAfter = now.Add(30 * time.Minute)
+				auth.NextRetryAfter = now.Add(30 * time.Minute)
 				if result.Model != "" {
 					shouldSuspendModel = true
 					suspendReason = "payment_required"
@@ -540,14 +540,14 @@ func (m *Manager) MarkResult(ctx context.Context, result Result) {
 				auth.Quota.Exceeded = true
 				auth.Quota.Reason = "quota"
 				auth.Quota.NextRecoverAt = now.Add(30 * time.Minute)
-				auth.NextRefreshAfter = auth.Quota.NextRecoverAt
+				auth.NextRetryAfter = auth.Quota.NextRecoverAt
 				if result.Model != "" {
 					shouldSuspendModel = true
 					registry.GetGlobalRegistry().SetModelQuotaExceeded(auth.ID, result.Model)
 				}
 			case 408, 500, 502, 503, 504:
 				auth.StatusMessage = "transient upstream error"
-				auth.NextRefreshAfter = now.Add(1 * time.Minute)
+				auth.NextRetryAfter = now.Add(1 * time.Minute)
 				if result.Model != "" {
 					shouldSuspendModel = false
 					suspendReason = "forbidden"

sdk/cliproxy/auth/selector.go

@@ -28,7 +28,7 @@ func (s *RoundRobinSelector) Pick(ctx context.Context, provider, model string, o
 	now := time.Now()
 	for i := range auths {
 		candidate := auths[i]
-		if candidate.Unavailable && candidate.Quota.NextRecoverAt.After(now) {
+		if candidate.Unavailable && candidate.NextRetryAfter.After(now) {
 			continue
 		}
 		if candidate.Status == StatusDisabled || candidate.Disabled {

sdk/cliproxy/auth/types.go

@@ -43,6 +43,8 @@ type Auth struct {
 	LastRefreshedAt time.Time `json:"last_refreshed_at"`
 	// NextRefreshAfter is the earliest time a refresh should retrigger.
 	NextRefreshAfter time.Time `json:"next_refresh_after"`
+	// NextRetryAfter is the earliest time a retry should retrigger.
+	NextRetryAfter time.Time `json:"next_retry_after"`
 
 	// Runtime carries non-serialisable data used during execution (in-memory only).
 	Runtime any `json:"-"`