refactor: 新增base.Repo与base.App，重构repo与app层代码

server/pkg/errorx/bizerror.go

@@ -0,0 +1,42 @@
+package errorx
+
+import (
+	"fmt"
+)
+
+// 业务错误
+type BizError struct {
+	code int16
+	err  string
+}
+
+var (
+	Success       BizError = NewBizCode(200, "success")
+	BizErr        BizError = NewBizCode(400, "biz error")
+	ServerError   BizError = NewBizCode(500, "server error")
+	PermissionErr BizError = NewBizCode(501, "token error")
+)
+
+// 错误消息
+func (e BizError) Error() string {
+	return e.err
+}
+
+// 错误码
+func (e BizError) Code() int16 {
+	return e.code
+}
+
+func (e BizError) String() string {
+	return fmt.Sprintf("errCode: %d, errMsg: %s", e.Code(), e.Error())
+}
+
+// 创建业务逻辑错误结构体，默认为业务逻辑错误
+func NewBiz(msg string, formats ...any) BizError {
+	return BizError{code: BizErr.code, err: fmt.Sprintf(msg, formats...)}
+}
+
+// 创建业务逻辑错误结构体，可设置指定错误code
+func NewBizCode(code int16, msg string, formats ...any) BizError {
+	return BizError{code: code, err: fmt.Sprintf(msg, formats...)}
+}