fix: restore dependency update compatibility

Fix VS Code webview type-check with TypeScript 5.9
Align ghostty-web to 0.4.0 across the workspace
Refresh ghostty-web patch for the updated package

packages/vscode/webview/main.tsx

@@ -333,13 +333,14 @@ const getRequestDirectoryHint = (url: URL, input?: RequestInfo | URL, init?: Req
   return undefined;
 };
 
-const decodeBase64 = (value: string): Uint8Array => {
+const decodeBase64 = (value: string): ArrayBuffer => {
   const binary = atob(value);
-  const bytes = new Uint8Array(binary.length);
+  const buffer = new ArrayBuffer(binary.length);
+  const bytes = new Uint8Array(buffer);
   for (let i = 0; i < binary.length; i += 1) {
     bytes[i] = binary.charCodeAt(i);
   }
-  return bytes;
+  return buffer;
 };
 
 const jsonResponse = (body: unknown, status = 200): Response => {
@@ -371,7 +372,7 @@ const buildProxiedResponse = (
     return new Response(proxied.bodyText, { status: proxied.status, headers: proxied.headers });
   }
 
-  const body = proxied.bodyBase64 ? decodeBase64(proxied.bodyBase64) : new Uint8Array();
+  const body = proxied.bodyBase64 ? decodeBase64(proxied.bodyBase64) : new ArrayBuffer(0);
   return new Response(body, { status: proxied.status, headers: proxied.headers });
 };