Fix default setting issue for first time install (#203)

* Fix default setting issue for first time install

* Update test expectations [skip ci]

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Co-authored-by: github-actions <[email protected]>

Author: huchenlei

browser_tests/nodeSearchBox.spec.ts-snapshots/added-node-chromium-linux.png

@@ -40,7 +40,8 @@ const updateTheme = (e) => {
 };
 
 const updateNodeSearchSetting = (e) => {
-  nodeSearchEnabled.value = e.detail.value === "default";
+  const settingValue = e.detail.value || "default";
+  nodeSearchEnabled.value = settingValue === "default";
 };
 
 const init = async () => {