fix(clients): flatten scoped remote output

- Render explicit --remote clients results with profile-only labels.

- Suppress remote host group headers for scoped client queries.

- Keep global and mixed client listings grouped by host.

- Update client and CLI tests for scoped remote rendering.

- Bump browser-cli and extension versions to 0.16.5.

tests/test_cli.py

@@ -294,29 +294,52 @@ def test_clients_reads_registry_with_trailing_garbage(tmp_path):
   assert "0.8.2" in result.output
 
 def test_clients_remote_uses_remote_endpoint_without_local_registry():
-  def fake_send_command(command, args=None, profile=None, remote=None, key=None):
-    assert command == "clients.list"
-    assert profile is None
-    assert remote == "127.0.0.1:8765"
-    return [{"name": "Chrome", "version": "1", "extensionVersion": "2.3.4"}]
+  target = BrowserTarget(
+    profile="work",
+    display_name="127.0.0.1:work",
+    socket_path="",
+    remote="127.0.0.1:8765",
+    browser_name="Chrome",
+    display_group="127.0.0.1",
+    version="1",
+    extension_version="2.3.4",
+  )
 
   with patch.dict(os.environ, {}, clear=True), patch(
     "browser_cli.commands.clients.REGISTRY_PATH", Path("/nonexistent/browser-cli-registry.json")
-  ), patch("browser_cli.client.core.send_command", side_effect=fake_send_command) as send_command:
+  ), patch("browser_cli.client.core.remote_browser_targets", return_value=[target]), patch(
+    "browser_cli.client.core.send_command"
+  ) as send_command:
     result = CliRunner().invoke(main, ["--remote", "127.0.0.1:8765", "clients"])
 
   assert result.exit_code == 0
-  send_command.assert_called_once()
-  assert "remote" in result.output
+  send_command.assert_not_called()
+  assert "work" in result.output
+  assert "127.0.0.1" not in result.output
   assert "Chrome" in result.output
   assert "2.3.4" in result.output
 
 def test_clients_remote_respects_global_browser_route():
-  with patch.dict(os.environ, {}, clear=True), patch("browser_cli.client.core.send_command", return_value=[]) as send_command:
+  target = BrowserTarget(
+    profile="work",
+    display_name="127.0.0.1:work",
+    socket_path="",
+    remote="127.0.0.1:8765",
+    browser_name="Chrome",
+    display_group="127.0.0.1",
+    version="1",
+    extension_version="2.3.4",
+  )
+
+  with patch.dict(os.environ, {}, clear=True), patch(
+    "browser_cli.client.core.remote_browser_targets", return_value=[target]
+  ), patch("browser_cli.client.core.send_command") as send_command:
     result = CliRunner().invoke(main, ["--remote", "127.0.0.1:8765", "--browser", "work", "clients"])
 
-  assert result.exit_code == 1
-  send_command.assert_called_once_with("clients.list", profile="work", remote="127.0.0.1:8765", key=None)
+  assert result.exit_code == 0
+  send_command.assert_not_called()
+  assert "work" in result.output
+  assert "127.0.0.1" not in result.output
 
 def test_clients_browser_alias_resolves_to_remote():
   """--browser <host> without --remote resolves the alias, fetches all targets from that remote,