第 1 阶段：用户与认证, mock登陆ok

backend/pkg/response/response.go

@@ -0,0 +1,48 @@
+package response
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+type Body struct {
+	Code    string `json:"code"`
+	Message string `json:"message"`
+	Data    any    `json:"data,omitempty"`
+}
+
+func OK(c *gin.Context, data any) {
+	c.JSON(http.StatusOK, Body{
+		Code:    "ok",
+		Message: "ok",
+		Data:    data,
+	})
+}
+
+func Created(c *gin.Context, data any) {
+	c.JSON(http.StatusCreated, Body{
+		Code:    "ok",
+		Message: "created",
+		Data:    data,
+	})
+}
+
+func Error(c *gin.Context, status int, code, message string) {
+	c.JSON(status, Body{
+		Code:    code,
+		Message: message,
+	})
+}
+
+func BadRequest(c *gin.Context, message string) {
+	Error(c, http.StatusBadRequest, "bad_request", message)
+}
+
+func Unauthorized(c *gin.Context, message string) {
+	Error(c, http.StatusUnauthorized, "unauthorized", message)
+}
+
+func ServiceUnavailable(c *gin.Context, message string) {
+	Error(c, http.StatusServiceUnavailable, "service_unavailable", message)
+}