v0.3.27

Fixes:
- Auto-detect LLM provider on fresh install — scans env for any configured API key instead of failing when Anthropic key is missing
- Strip temperature parameter for o-series reasoning models (o1/o3/o4) — fixes 400 errors from OpenAI
- Auto-retry on temperature rejection for any model that returns unsupported_parameter
- Serde alias on ModelConfig.model field — TOML manifests with name = "..." under [model] now work correctly
- Image display preserved in dashboard session history — images no longer lost on page reload
- Custom provider setup UI in Settings tab — add any OpenAI-compatible endpoint from the dashboard
- Claude Code added to wizard popular providers with install instructions