第 1 阶段：用户与认证, mock登陆ok

backend/internal/modules/user/handler.go

@@ -0,0 +1,42 @@
+package user
+
+import (
+	"errors"
+
+	"hfb_sys/backend/internal/middleware"
+	"hfb_sys/backend/internal/modules/auth"
+	"hfb_sys/backend/pkg/response"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+type Handler struct {
+	users *auth.UserRepository
+}
+
+func NewHandler(users *auth.UserRepository) *Handler {
+	return &Handler{users: users}
+}
+
+func (h *Handler) Me(c *gin.Context) {
+	if h.users == nil {
+		response.ServiceUnavailable(c, "数据库未连接")
+		return
+	}
+	userID, ok := c.Get(middleware.ContextUserID)
+	if !ok {
+		response.Unauthorized(c, "缺少用户上下文")
+		return
+	}
+	user, err := h.users.FindByID(userID.(uint64))
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		response.Unauthorized(c, "用户不存在")
+		return
+	}
+	if err != nil {
+		response.ServiceUnavailable(c, "用户查询失败")
+		return
+	}
+	response.OK(c, user)
+}