fix(ui): null in JSON array crashes ComplexLogItem (#4780)

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

assets/components/LogViewer/ComplexLogItem.spec.ts

@@ -53,6 +53,11 @@ describe("<ComplexLogItem />", () => {
     expect(wrapper.find(".array").text()).toContain("b");
   });
 
+  test("renders null inside an array without throwing", () => {
+    const wrapper = mountItem({ tags: ["a", null, "b"] } as any);
+    expect(wrapper.find(".array").text()).toContain("null");
+  });
+
   test("shows a placeholder when every value is hidden", () => {
     const visibleKeys = ref(new Map<string[], boolean>([[["a"], false]]));
     const wrapper = mountItem({ a: 1 }, visibleKeys);

assets/components/LogViewer/ComplexLogItem.vue

@@ -15,7 +15,7 @@
             class="after:text-base-content/70 not-last:after:content-[',']"
           >
             <ReuseTemplate :data="item" v-if="isObject(item) || Array.isArray(item)" />
-            <span v-else class="value" :class="typeof item" v-html="stripAnsi(item.toString())"></span>
+            <span v-else class="value" :class="typeof item" v-html="stripAnsi(String(item))"></span>
           </li>
         </ul>
       </li>