chore(astro): ignore false unused import build warning

Suppress Astro's remote helper warning during Rollup builds
when it points to astro/dist/assets/utils/index.js.

astro.config.mjs

@@ -1,6 +1,27 @@
 import { defineConfig } from 'astro/config';
 
+const shouldIgnoreAstroUnusedImportWarning = (warning) => {
+  return (
+    warning.code === 'UNUSED_EXTERNAL_IMPORT' &&
+    warning.exporter === '@astrojs/internal-helpers/remote' &&
+    warning.ids?.some((id) => id.includes('node_modules/astro/dist/assets/utils/index.js'))
+  );
+};
+
 export default defineConfig({
   site: 'https://zblade.dev',
   output: 'static',
+  vite: {
+    build: {
+      rollupOptions: {
+        onwarn(warning, warn) {
+          if (shouldIgnoreAstroUnusedImportWarning(warning)) {
+            return;
+          }
+
+          warn(warning);
+        },
+      },
+    },
+  },
 });