fix(remote): resolve remembered explicit-port endpoints

- Resolve bare remote hosts through the remote registry when one explicit port is stored.
- Preserve bare host behavior when no unique explicit-port registry match exists.
- Route requested remote targets through the new registry resolver.
- Add registry tests for unique and ambiguous explicit-port matches.
- Bump package and extension versions to 0.16.6.

browser_cli/remote/registry.py

@@ -22,6 +22,32 @@ def load_remotes() -> dict[str, dict[str, str]]:
   # Normalize keys so old entries stored as "domain:443" match current lookups.
   return {_normalize_endpoint(str(endpoint)): cfg for endpoint, cfg in data.items() if isinstance(cfg, dict)}
 
+def resolve_remote_endpoint(endpoint: str | None) -> str | None:
+  """Resolve a user-supplied remote alias to a remembered endpoint.
+
+  Domain-like remotes without an explicit port still default to :443 when no
+  matching remembered remote exists. If the user remembered exactly one
+  explicit-port remote for the same host (for example
+  ``browser-host.example:8765``), use that endpoint so ``--remote
+  browser-host.example`` targets the stored service instead of assuming HTTPS.
+  """
+  if not endpoint:
+    return None
+  normalized = _normalize_endpoint(endpoint)
+  host, sep, _port = normalized.rpartition(":")
+  if sep:
+    return normalized
+
+  remotes = load_remotes()
+  explicit_matches = []
+  for remote_endpoint in remotes:
+    remote_host, remote_sep, remote_port = remote_endpoint.rpartition(":")
+    if remote_sep and remote_host == normalized and remote_port != "443":
+      explicit_matches.append(remote_endpoint)
+  if len(explicit_matches) == 1:
+    return explicit_matches[0]
+  return normalized
+
 def is_valid_key_spec(value: str) -> bool:
   """Return True for 'agent', 'agent:<selector>', or a plausible key file path."""
   return value == "agent" or value.startswith("agent:") or (