refactor: consolidate shared catalog and API helpers

webui/src/api/client.ts

@@ -127,6 +127,19 @@ export function apiPostJson<TResponse, TPayload = unknown>(
   return apiPost<TResponse>(settings, path, { ...init, body: JSON.stringify(payload) });
 }
 
+export function apiPatch<TResponse>(settings: ApiSettings, path: string, init: Omit<RequestInit, "method"> = {}): Promise<TResponse> {
+  return apiFetch<TResponse>(settings, path, { ...init, method: "PATCH" });
+}
+
+export function apiPatchJson<TResponse, TPayload = unknown>(
+  settings: ApiSettings,
+  path: string,
+  payload: TPayload,
+  init: Omit<RequestInit, "method" | "body"> = {}
+): Promise<TResponse> {
+  return apiPatch<TResponse>(settings, path, { ...init, body: JSON.stringify(payload) });
+}
+
 export function loadApiSettings(): ApiSettings {
   const storedBaseUrl = loadStoredSetting("baseUrl");
   const storedApiKey = sessionStorage.getItem(`${SESSION_STORAGE_KEY}.apiKey`);