fix(integration): restore subprocess encoding/stdin guards dropped in simplification
Simplification workers collapsed subprocess call sites into shared kwargs
helpers and dropped the Windows/TUI safety kwargs on the way:
- encoding='utf-8', errors='replace' restored on text=True runs in
copilot_acp_client, hermes_cli/setup (vercel install), managed_uv
(codesign steps), local_runtime/hardware._stdout, a2a adapter.
- stdin=subprocess.DEVNULL restored on copilot probe, verify/runner
_SUBPROCESS_KW, iron_proxy._run, google_meet playwright/system_profiler,
simplex convert, whatsapp _RUN_TEXT, mem0 ollama serve Popen.
google_meet sudo/brew install keeps inherited stdin (user-confirmed,
may prompt) — marked noqa: subprocess-stdin.
- Windows-safe SIGKILL: getattr(signal, 'SIGKILL', SIGTERM) in
verify/runner; photon _kill call re-marked windows-footgun: ok
(unreachable on win32).
- scripts/check_subprocess_stdin.py now recognizes **kwargs splats
(**_KW / **_kw(...)) ONLY when the same-file definition provably sets
stdin= — covers tui_gateway _capture_run_kwargs/run_kw. Parity test added.
4d1880e0bf