修复短信登录限流处理

backend/internal/integrations/sms/provider.go

@@ -3,10 +3,38 @@ package sms
 import (
 	"context"
 	"errors"
+	"fmt"
 )
 
-var ErrProviderConfigInvalid = errors.New("sms provider config invalid")
+var (
+	ErrProviderConfigInvalid = errors.New("sms provider config invalid")
+	ErrProviderRateLimited   = errors.New("sms provider rate limited")
+)
 
 type Provider interface {
 	SendLoginCode(ctx context.Context, phone string, code string) error
 }
+
+type ProviderError struct {
+	Code    string
+	Message string
+	Err     error
+}
+
+func (e *ProviderError) Error() string {
+	if e.Message != "" {
+		return fmt.Sprintf("sms provider rejected: %s: %s", e.Code, e.Message)
+	}
+	if e.Code != "" {
+		return fmt.Sprintf("sms provider rejected: %s", e.Code)
+	}
+	return "sms provider rejected"
+}
+
+func (e *ProviderError) Unwrap() error {
+	return e.Err
+}
+
+func IsProviderRateLimited(err error) bool {
+	return errors.Is(err, ErrProviderRateLimited)
+}