fix(extension): refresh plugin market install state after install (AstrBotDevs#6124)

* fix(extension): refresh market install state after plugin install

* chore: remove redundant call

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: letr007

dashboard/src/views/extension/useExtensionPage.js

@@ -1309,6 +1309,7 @@ export const useExtensionPage = () => {
     onLoadingDialogResult(1, resData.message);
     dialog.value = false;
     await getExtensions();
+    checkAlreadyInstalled();
 
     viewReadme({
       name: resData.data.name,