use full terminal columns for completion test and add native host app as a single script wraper for native host app import

tests/test_cli.py

@@ -80,22 +80,15 @@ def test_install_help_lists_supported_browsers():
     assert "[chrome|chromium|brave|edge|vivaldi]" in result.output
 
 
-def test_install_windows_registers_native_host(tmp_path, monkeypatch):
-    local_app_data = tmp_path / "LocalAppData"
-    extension_dir = tmp_path / "extension"
-    extension_dir.mkdir()
-    native_host_src = tmp_path / "native_host.py"
-    native_host_src.write_text("print('ok')", encoding="utf-8")
+def test_install_windows_registers_native_host(tmp_path):
     writes = []
 
     class FakeKey:
         def __init__(self, path):
             self.path = path
-
         def __enter__(self):
             return self
-
-        def __exit__(self, exc_type, exc, tb):
+        def __exit__(self, _exc_type, _exc, _tb):
             return False
 
     fake_winreg = SimpleNamespace(
@@ -104,35 +97,47 @@ def test_install_windows_registers_native_host(tmp_path, monkeypatch):
         KEY_WOW64_32KEY=0x0200,
         KEY_WOW64_64KEY=0x0100,
         REG_SZ=1,
+        CreateKeyEx=lambda _root, path, _reserved, _access: FakeKey(path),
+        SetValueEx=lambda key, name, _reserved, _reg_type, value: writes.append((key.path, name, value)),
     )
 
-    def fake_create_key(root, path, reserved, access):
-        return FakeKey(path)
-
-    def fake_set_value(key, name, reserved, reg_type, value):
-        writes.append((key.path, name, value))
-
-    fake_winreg.CreateKeyEx = fake_create_key
-    fake_winreg.SetValueEx = fake_set_value
-
-    monkeypatch.setenv("LOCALAPPDATA", str(local_app_data))
-
+    host_exe = tmp_path / "browser-cli-native-host.exe"
     with patch("browser_cli.cli.is_windows", return_value=True), patch(
-        "browser_cli.cli.Path.home", return_value=tmp_path
-    ), patch("browser_cli.cli.click.prompt", return_value="abc123"), patch(
-        "browser_cli.cli.shutil.copy2"
-    ) as copy2, patch("browser_cli.cli.Path.write_text") as write_text, patch.dict(
-        sys.modules, {"winreg": fake_winreg}
-    ):
-        copy2.side_effect = lambda src, dst: Path(dst).write_text(native_host_src.read_text(encoding="utf-8"), encoding="utf-8")
+        "browser_cli.cli._native_host_exe", return_value=host_exe
+    ), patch("browser_cli.cli._write_native_host_exe"), patch(
+        "browser_cli.cli.Path.write_text"
+    ), patch.dict(sys.modules, {"winreg": fake_winreg}):
         result = CliRunner().invoke(main, ["install", "edge"])
 
     assert result.exit_code == 0
     assert any("Software\\Microsoft\\Edge\\NativeMessagingHosts\\com.browsercli.host" in path for path, _, _ in writes)
-    assert "Registered native host" in result.output
-    assert "Wrote native host manifest" in result.output
-    wrapper_writes = [call.args[0] for call in write_text.call_args_list if call.args]
-    assert any("@echo off" in text for text in wrapper_writes)
+
+def test_write_native_host_exe_unix(tmp_path):
+    from browser_cli.cli import _write_native_host_exe
+
+    host = tmp_path / "libexec" / "browser-cli-native-host"
+    with patch("browser_cli.cli.is_windows", return_value=False):
+        _write_native_host_exe(host)
+
+    assert host.exists()
+    content = host.read_text()
+    assert content.startswith(f"#!{sys.executable}")
+    assert "from browser_cli.native_host import main" in content
+    assert host.stat().st_mode & 0o111  # executable bit set
+
+
+def test_write_native_host_exe_windows(tmp_path):
+    from browser_cli.cli import _write_native_host_exe
+
+    host = tmp_path / "libexec" / "browser-cli-native-host.cmd"
+    with patch("browser_cli.cli.is_windows", return_value=True):
+        _write_native_host_exe(host)
+
+    assert host.exists()
+    content = host.read_text(encoding="utf-8")
+    assert "@echo off" in content
+    assert "browser_cli.native_host" in content
+
 
 def test_clients_exits_cleanly_when_registry_is_missing():
     with patch("browser_cli.cli.REGISTRY_PATH", Path("/nonexistent/browser-cli-registry.json")), patch(