Add debugging to serveWeb to identify slow response generation

- Add debug logs for serveWeb calls and timing
- Measure content length and response creation time
- Help identify if createResponse is the bottleneck
- Debug Bad Gateway timeout issues

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

pkgs/server/serve-web.ts

@@ -7,17 +7,26 @@ export const serveWeb = async (arg: {
   cache_accept: string;
   opt?: {
     rewrite?: (arg: {
-      body: Bun.BodyInit;
+      body: Bun.BodyInputStream;
       headers: Headers | any;
-    }) => Bun.BodyInit;
+    }) => Bun.BodyInputStream;
   };
 }) => {
-  const type = mime.getType(arg.pathname);
+  console.log(`[DEBUG] serveWeb called for: ${arg.pathname}, content length: ${arg.content.length}`);
+  const startTime = Date.now();
 
-  return createResponse(arg.content, {
+  const type = mime.getType(arg.pathname);
+  console.log(`[DEBUG] MIME type: ${type}`);
+
+  const response = createResponse(arg.content, {
     cache_accept: arg.cache_accept,
     high_compression: true,
     headers: !type ? undefined : { "content-type": type },
     rewrite: arg.opt?.rewrite,
   });
+
+  const endTime = Date.now();
+  console.log(`[DEBUG] createResponse completed in ${endTime - startTime}ms`);
+
+  return response;
 };