Add null guard before spreading fetchData result in MoreModal

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/Discover/Conformance/MoreModal.vue

@@ -386,7 +386,7 @@ async function fetchData() {
       showTraceId.value,
       startNum.value,
     );
-    infiniteData.value = [...infiniteData.value, ...result];
+    if (result) infiniteData.value = [...infiniteData.value, ...result];
     infiniteFinish.value = true;
   } catch (error) {
     console.error("Failed to load data:", error);