fix: 重置密码功能新增UI配置发送邮件域名

backend/internal/service/domain_constants.go

@@ -80,6 +80,7 @@ const (
 	SettingKeyRegistrationEmailSuffixWhitelist = "registration_email_suffix_whitelist" // 注册邮箱后缀白名单（JSON 数组）
 	SettingKeyPromoCodeEnabled                 = "promo_code_enabled"                  // 是否启用优惠码功能
 	SettingKeyPasswordResetEnabled             = "password_reset_enabled"              // 是否启用忘记密码功能（需要先开启邮件验证）
+	SettingKeyFrontendURL                      = "frontend_url"                        // 前端基础URL，用于生成邮件中的重置密码链接
 	SettingKeyInvitationCodeEnabled            = "invitation_code_enabled"             // 是否启用邀请码注册
 
 	// 邮件服务设置

backend/internal/service/setting_service.go

@@ -116,6 +116,15 @@ func (s *SettingService) GetAllSettings(ctx context.Context) (*SystemSettings, e
 	return s.parseSettings(settings), nil
 }
 
+// GetFrontendURL 获取前端基础URL（数据库优先，fallback 到配置文件）
+func (s *SettingService) GetFrontendURL(ctx context.Context) string {
+	val, err := s.settingRepo.GetValue(ctx, SettingKeyFrontendURL)
+	if err == nil && strings.TrimSpace(val) != "" {
+		return strings.TrimSpace(val)
+	}
+	return s.cfg.Server.FrontendURL
+}
+
 // GetPublicSettings 获取公开设置（无需登录）
 func (s *SettingService) GetPublicSettings(ctx context.Context) (*PublicSettings, error) {
 	keys := []string{
@@ -401,6 +410,7 @@ func (s *SettingService) UpdateSettings(ctx context.Context, settings *SystemSet
 	updates[SettingKeyRegistrationEmailSuffixWhitelist] = string(registrationEmailSuffixWhitelistJSON)
 	updates[SettingKeyPromoCodeEnabled] = strconv.FormatBool(settings.PromoCodeEnabled)
 	updates[SettingKeyPasswordResetEnabled] = strconv.FormatBool(settings.PasswordResetEnabled)
+	updates[SettingKeyFrontendURL] = settings.FrontendURL
 	updates[SettingKeyInvitationCodeEnabled] = strconv.FormatBool(settings.InvitationCodeEnabled)
 	updates[SettingKeyTotpEnabled] = strconv.FormatBool(settings.TotpEnabled)
 
@@ -767,6 +777,7 @@ func (s *SettingService) parseSettings(settings map[string]string) *SystemSettin
 		RegistrationEmailSuffixWhitelist: ParseRegistrationEmailSuffixWhitelist(settings[SettingKeyRegistrationEmailSuffixWhitelist]),
 		PromoCodeEnabled:                 settings[SettingKeyPromoCodeEnabled] != "false", // 默认启用
 		PasswordResetEnabled:             emailVerifyEnabled && settings[SettingKeyPasswordResetEnabled] == "true",
+		FrontendURL:                      settings[SettingKeyFrontendURL],
 		InvitationCodeEnabled:            settings[SettingKeyInvitationCodeEnabled] == "true",
 		TotpEnabled:                      settings[SettingKeyTotpEnabled] == "true",
 		SMTPHost:                         settings[SettingKeySMTPHost],

backend/internal/service/settings_view.go

@@ -6,6 +6,7 @@ type SystemSettings struct {
 	RegistrationEmailSuffixWhitelist []string
 	PromoCodeEnabled                 bool
 	PasswordResetEnabled             bool
+	FrontendURL                      string
 	InvitationCodeEnabled            bool
 	TotpEnabled                      bool // TOTP 双因素认证