refactor: cache sanitizeUrl to improve performance

Co-authored-by: huntie <2547783+huntie@users.noreply.github.com>

Author: Copilot

packages/cli-server-api/src/openURLMiddleware.ts

@@ -11,6 +11,17 @@ import {json} from 'body-parser';
 import connect from 'connect';
 import open from 'open';
 
+// Cache the imported sanitizeUrl function to avoid repeated dynamic imports
+let sanitizeUrlFn: ((url: string) => string) | null = null;
+
+async function getSanitizeUrl(): Promise<(url: string) => string> {
+  if (sanitizeUrlFn === null) {
+    const module = await import('strict-url-sanitise');
+    sanitizeUrlFn = module.sanitizeUrl;
+  }
+  return sanitizeUrlFn;
+}
+
 /**
  * Open a URL in the system browser.
  */
@@ -39,7 +50,7 @@ export async function openURLMiddleware(
 
     let sanitizedUrl: string;
     try {
-      const {sanitizeUrl} = await import('strict-url-sanitise');
+      const sanitizeUrl = await getSanitizeUrl();
       sanitizedUrl = sanitizeUrl(url);
     } catch (error) {
       res.writeHead(400);