chore: 初始化仓库，排除二进制文件和覆盖率文件

internal/model/system_config.go

@@ -0,0 +1,41 @@
+package model
+
+import (
+	"time"
+)
+
+// ConfigType 配置类型
+type ConfigType string
+
+const (
+	ConfigTypeString  ConfigType = "STRING"
+	ConfigTypeInteger ConfigType = "INTEGER"
+	ConfigTypeBoolean ConfigType = "BOOLEAN"
+	ConfigTypeJSON    ConfigType = "JSON"
+)
+
+// SystemConfig 系统配置模型
+type SystemConfig struct {
+	ID          int64      `gorm:"column:id;primaryKey;autoIncrement" json:"id"`
+	Key         string     `gorm:"column:key;type:varchar(100);not null;uniqueIndex" json:"key"`
+	Value       string     `gorm:"column:value;type:text;not null" json:"value"`
+	Description string     `gorm:"column:description;type:varchar(255);not null;default:''" json:"description"`
+	Type        ConfigType `gorm:"column:type;type:varchar(50);not null;default:'STRING'" json:"type"` // STRING, INTEGER, BOOLEAN, JSON
+	IsPublic    bool       `gorm:"column:is_public;not null;default:false;index" json:"is_public"` // 是否可被前端获取
+	CreatedAt   time.Time  `gorm:"column:created_at;type:timestamp;not null;default:CURRENT_TIMESTAMP" json:"created_at"`
+	UpdatedAt   time.Time  `gorm:"column:updated_at;type:timestamp;not null;default:CURRENT_TIMESTAMP" json:"updated_at"`
+}
+
+// TableName 指定表名
+func (SystemConfig) TableName() string {
+	return "system_config"
+}
+
+// SystemConfigPublicResponse 公开配置响应
+type SystemConfigPublicResponse struct {
+	SiteName           string `json:"site_name"`
+	SiteDescription    string `json:"site_description"`
+	RegistrationEnabled bool   `json:"registration_enabled"`
+	MaintenanceMode    bool   `json:"maintenance_mode"`
+	Announcement       string `json:"announcement"`
+}