chore: release v0.18.0

[doramirdor]

Bundles the ADC support + Gemini streaming fix landed since 0.17.0:

• Application Default Credentials for Gemini (Adc gemini #57, @froody) — falls back to google.auth.default() when no GOOGLE_API_KEY is set, so users can auth via GOOGLE_CLOUD_PROJECT / GOOGLE_CLOUD_LOCATION (Vertex AI / gcloud creds).
• Fix Gemini streaming (Adc gemini #57, @froody) — _dispatch_model_stream was consuming _stream_gemini (an async generator) with a plain for loop and would have raised TypeError on any real streaming Gemini call. Now uses async for. Robust to google-genai SDK returning enum-like chunks / finish_reason.
• savings tolerates None values (Adc gemini #57, @froody) — selected_model: None / tier: None in real logs (failed/aborted requests) no longer crash the report.
• nadirclaw status displays the mid model (Adc gemini #57, @froody) when one is configured.

Why a release

The Gemini streaming bug was latent — anyone who actually hit stream=true on a Gemini-routed request would have gotten TypeError: 'async_generator' object is not iterable. Worth pinning a version. ADC is also a meaningful UX win for Vertex AI users who can't easily mint an API key.

Diff

• nadirclaw/__init__.py — __version__ = "0.18.0"
• CHANGELOG.md — new [0.18.0] block under ### Added and ### Fixed

Verification

• CI green on Adc gemini #57 across Python 3.10 / 3.11 / 3.12 (run 26362224241).
• 663 tests passing on main at the merge of Adc gemini #57.

Co-Authored-By: Claude Opus 4.7 noreply@anthropic.com

🤖 Generated with Claude Code

[doramirdor]

CI green across Python 3.10 / 3.11 / 3.12 (run 26402176670) and the diff is the standard release shape (version bump + CHANGELOG). Merging now and cutting the v0.18.0 tag — no functional changes vs. main since #57 landed yesterday.

— scheduled review bot