fix: refine openExternalUrl to correctly import Tauri shell plugin based on environment

src/app/utils/tauri.ts

@@ -3,10 +3,11 @@
  * @param url The URL to open
  */
 export const openExternalUrl = async (url: string): Promise<void> => {
-  if (typeof window !== 'undefined' && (window as any).__TAURI__) {
+  // Only include Tauri shell import in Tauri builds
+  // @ts-ignore
+  if (import.meta.env.VITE_TAURI) {
     try {
-      // @ts-ignore
-      const { open } = await import(/* @vite-ignore */ '@tauri-apps/plugin-shell');
+      const { open } = await import('@tauri-apps/plugin-shell');
       await open(url);
       return;
     } catch (err) {