Rework request context handler

backend/internal/handlers/user_handlers.go

@@ -0,0 +1,24 @@
+package handlers
+
+import (
+	"net/http"
+
+	"novamd/internal/httpcontext"
+)
+
+func (h *Handler) GetUser() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		ctx, ok := httpcontext.GetRequestContext(w, r)
+		if !ok {
+			return
+		}
+
+		user, err := h.DB.GetUserByID(ctx.UserID)
+		if err != nil {
+			http.Error(w, "Failed to get user", http.StatusInternalServerError)
+			return
+		}
+
+		respondJSON(w, user)
+	}
+}