Add backend foundation and config-driven workbench

backend/internal/httpapi/handlers/me_handler.go

@@ -0,0 +1,34 @@
+package handlers
+
+import (
+	"net/http"
+
+	"cmr-backend/internal/apperr"
+	"cmr-backend/internal/httpapi/middleware"
+	"cmr-backend/internal/httpx"
+	"cmr-backend/internal/service"
+)
+
+type MeHandler struct {
+	meService *service.MeService
+}
+
+func NewMeHandler(meService *service.MeService) *MeHandler {
+	return &MeHandler{meService: meService}
+}
+
+func (h *MeHandler) Get(w http.ResponseWriter, r *http.Request) {
+	auth := middleware.GetAuthContext(r.Context())
+	if auth == nil {
+		httpx.WriteError(w, apperr.New(http.StatusUnauthorized, "unauthorized", "missing auth context"))
+		return
+	}
+
+	user, err := h.meService.GetMe(r.Context(), auth.UserID)
+	if err != nil {
+		httpx.WriteError(w, err)
+		return
+	}
+
+	httpx.WriteJSON(w, http.StatusOK, map[string]any{"data": user})
+}