Strip content-encoding/length from Go responses

Go server always sends gzip regardless of accept-encoding. Bun
decompresses it automatically but leaves the content-encoding
header. Strip it so the toes proxy doesn't try to decompress
the already-decompressed response.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/proxy.ts

@@ -20,14 +20,19 @@ export function createProxy(socketPath: string, isHealthy: () => boolean, isRunn
 
     const hasBody = req.method !== 'GET' && req.method !== 'HEAD'
     const body = hasBody ? await req.arrayBuffer() : undefined
-    const headers = new Headers(req.headers)
-    headers.delete('accept-encoding')
 
     return fetch(`http://localhost${url.pathname}${url.search}`, {
       method: req.method,
-      headers,
+      headers: req.headers,
       body,
       unix: socketPath,
+    }).then((r) => {
+      // Bun auto-decompresses gzip but leaves content-encoding header.
+      // Strip it so the next proxy layer doesn't try to decompress again.
+      const headers = new Headers(r.headers)
+      headers.delete('content-encoding')
+      headers.delete('content-length')
+      return new Response(r.body, { status: r.status, headers })
     }).catch((e) => {
       console.error('Proxy error:', e)
       return new Response('Tronbyt server is not responding', { status: 502 })