fix(cli): guard interactive chat without tty

[yyydao]

Summary
- Add an early TTY guard for interactive hermes chat / bare hermes
- Avoid prompt_toolkit crashing on macOS when stdin is a pipe or regular file
- Keep hermes chat -q ... and image single-query flows usable in non-interactive environments

Test Plan
- venv/bin/python -m pytest tests/hermes_cli/test_setup_noninteractive.py -q -o 'addopts='
- venv/bin/python -m pytest tests/hermes_cli/test_tui_resume_flow.py tests/hermes_cli/test_setup_noninteractive.py -q -o 'addopts='
- printf '' | ./venv/bin/hermes chat --ignore-rules --ignore-user-config

[alt-glitch]

Duplicate of #18136 (and #19092, #8842, #7865). Same TTY guard for interactive chat without tty. Multiple competing PRs exist.

[teknium1]

Thanks for the focused guard and regression coverage.

Suggested changes

• Please add a no-TTY --image regression case next to the new -q case. Current cli.py:16043 makes either query or image select the one-shot path, and the proposed guard intentionally exempts both. Covering the image branch will preserve the behavior stated in this PR.

The premise remains valid on current main: hermes_cli/main.py:2404 invokes the classic CLI after the no-provider check, and cli.py:16265 enters its interactive prompt_toolkit loop whenever neither query nor image is supplied. This is an automated hermes-sweeper review.

[teknium1]

Please add the equivalent no-TTY image=... case here. cli.py:16043 treats an image without -q as one-shot mode too, and the production guard explicitly exempts it.