test: update non-Termux workspace-scope fixtures for #38358 fix

The non-Termux web/TUI install path now scopes to --workspace <name>;
update two fixtures that asserted the old unscoped install commands.

tests/hermes_cli/test_tui_npm_install.py

@@ -255,6 +255,8 @@ def test_make_tui_argv_keeps_desktop_workspace_install_behaviour(
     assert calls[0][0][0] == [
         "/bin/npm",
         "install",
+        "--workspace",
+        "ui-tui",
         "--silent",
         "--no-fund",
         "--no-audit",

tests/hermes_cli/test_web_ui_build.py

@@ -218,7 +218,7 @@ class TestBuildWebUISkipsWhenFresh:
 
         assert result is True
         args, kwargs = mock_run.call_args
-        assert args[0] == ["/usr/bin/npm", "ci", "--silent"]
+        assert args[0] == ["/usr/bin/npm", "ci", "--workspace", "web", "--silent"]
         assert kwargs["cwd"] == tmp_path