fix(windows): native Windows correctness for CLI, gateway status, banner, and WSL browser paths

Salvaged from #57016 by @lEWFkRAD:
- cli.py: handle file:///C:/... drive-letter URIs on nt (strip the
  leading slash urlparse leaves); join Termux example paths with literal
  forward slashes so hints stay POSIX on Windows.
- gateway/status.py + hermes_cli/gateway.py: normalize backslashes to
  forward slashes before the HERMES_HOME substring match so separator
  style cannot defeat profile ownership detection.
- hermes_cli/banner.py: cprint degrades to plain print when
  prompt_toolkit has no console (NoConsoleScreenBufferError on
  redirected/absent Windows stdout).
- hermes_cli/browser_connect.py: posixpath.join for WSL /mnt/c/... bases
  (os.path.join would emit backslashes on nt).
- Test hardening: symlink skip-guards, USERPROFILE alongside HOME for
  ntpath.expanduser, SIGKILL absence skipif fixed via monkeypatch,
  drive-letter URI / separator-normalization / banner-fallback coverage.

Dropped from the original PR: tests/cli/conftest.py fixture and the
AppSession _output monkeypatch — main's merged tests/cli/conftest.py
already handles that prompt_toolkit pollution.

tests/cli/test_cli_browser_connect.py

@@ -83,6 +83,17 @@ class TestChromeDebugLaunch:
         assert candidates == [brave, edge]
 
 
+    def test_wsl_install_candidates_keep_posix_separators_on_nt_host(self):
+        expected = "/mnt/c/Program Files/Google/Chrome/Application/chrome.exe"
+
+        with patch("hermes_cli.browser_connect.shutil.which", return_value=None), \
+             patch("hermes_cli.browser_connect.os.path.isfile", side_effect=lambda path: path == expected):
+            candidates = get_chrome_debug_candidates("Linux")
+
+        assert candidates == [expected]
+        assert "\\" not in candidates[0]
+
+
     def test_wait_for_browser_debug_ready_or_exit_detects_early_exit(self, monkeypatch):
         class _Proc:
             def __init__(self):