refactor: 调整项目结构为单向依赖

backend/internal/service/settings_view.go

@@ -0,0 +1,42 @@
+package service
+
+type SystemSettings struct {
+	RegistrationEnabled bool
+	EmailVerifyEnabled  bool
+
+	SmtpHost     string
+	SmtpPort     int
+	SmtpUsername string
+	SmtpPassword string
+	SmtpFrom     string
+	SmtpFromName string
+	SmtpUseTLS   bool
+
+	TurnstileEnabled   bool
+	TurnstileSiteKey   string
+	TurnstileSecretKey string
+
+	SiteName     string
+	SiteLogo     string
+	SiteSubtitle string
+	ApiBaseUrl   string
+	ContactInfo  string
+	DocUrl       string
+
+	DefaultConcurrency int
+	DefaultBalance     float64
+}
+
+type PublicSettings struct {
+	RegistrationEnabled bool
+	EmailVerifyEnabled  bool
+	TurnstileEnabled    bool
+	TurnstileSiteKey    string
+	SiteName            string
+	SiteLogo            string
+	SiteSubtitle        string
+	ApiBaseUrl          string
+	ContactInfo         string
+	DocUrl              string
+	Version             string
+}