- Providers: add openrouter (https://openrouter.ai/api/v1) and lmstudio
(http://localhost:1234/v1), both OpenAI-compatible. Selecting a provider now
auto-fills its verified base URL, cost tier and default capabilities.
- API key is typed directly in the form and stored securely as a secret under the
provider's env name — no manual env var to manage.
- New POST /admin/api/provider/models validates the key and lists the provider's
models; a "Test & load models" button fills a searchable dropdown. The model
field now sits below the key (some providers list models from the key).
- Fuller capability set: tools, vision, audio, reasoning, json, caching.
infosave2007
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