fix: retry AAD client creation after a failed token request

The rejected promise was cached, so a single network hiccup while
getting the Dataverse or API token broke every request to that resource
until the page was reloaded. Seen once in T-OBJ-11.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/webparts/stroyBot/services/http/spfxClients.ts

@@ -23,9 +23,14 @@ export function createSharePointClient(context: WebPartContext): IHttpClient {
 export function createAadClient(context: WebPartContext, resource: string): IHttpClient {
   let clientPromise: Promise<AadHttpClient> | undefined;
 
+  // Неудачную попытку не запоминаем: иначе одна сетевая осечка при получении токена
+  // ломала бы все запросы к этому ресурсу до перезагрузки страницы.
   const getClient = (): Promise<AadHttpClient> => {
     if (!clientPromise) {
-      clientPromise = context.aadHttpClientFactory.getClient(resource);
+      clientPromise = context.aadHttpClientFactory.getClient(resource).catch((error: unknown) => {
+        clientPromise = undefined;
+        throw error;
+      });
     }
     return clientPromise;
   };