fix: always set loading

ui/src/message/MessagesStore.ts

@@ -55,15 +55,18 @@ export class MessagesStore {
         }
         this.loading = true;
 
+        try {
             const pagedResult = await this.fetchMessages(appId, state.nextSince).then(
                 (resp) => resp.data
             );
-
             state.messages.replace([...state.messages, ...pagedResult.messages]);
             state.nextSince = pagedResult.paging.since ?? 0;
             state.hasMore = 'next' in pagedResult.paging;
             state.loaded = true;
+        } finally {
             this.loading = false;
+        }
+
         return Promise.resolve();
     };