fix: drop browser-cli ALPN restriction on TLS port 443

set_alpn_protocols(["browser-cli"]) caused TLS handshake failure
(no_application_protocol alert) when connecting through a reverse
proxy (e.g. Traefik) that terminates TLS but doesn't know the custom
ALPN. Plain TLS without ALPN negotiation works correctly.

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

browser_cli/client.py

@@ -287,7 +287,6 @@ def _send_remote(endpoint: str, msg: dict, private_key=None) -> bytes | None:
         if port == 443:
             import ssl
             ctx = ssl.create_default_context()
-            ctx.set_alpn_protocols(["browser-cli"])  # prevent h2/http1.1 ALPN confusion
             sock = ctx.wrap_socket(raw_sock, server_hostname=host)
         else:
             sock = raw_sock