feat: add updated_at to modpacks and /api/launcher/modpacks/summary endpoint

internal/api/launcher_handler.go

@@ -35,3 +35,15 @@ func (h *LauncherHandler) GetModpackManifest(w http.ResponseWriter, r *http.Requ
 	w.WriteHeader(http.StatusOK)
 	json.NewEncoder(w).Encode(manifest)
 }
+
+func (h *LauncherHandler) GetModpacksSummary(w http.ResponseWriter, r *http.Request) {
+	summaries, err := h.ModpackRepo.GetModpacksSummary(r.Context())
+	if err != nil {
+		http.Error(w, "Failed to get modpacks summary", http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(summaries)
+}