CaseMark lets operators bring their own AI keys

The change is structural, not cosmetic. CaseMark added encrypted storage for customer-supplied API keys - the kind of credential a firm might already hold with Anthropic (maker of Claude) or Google (maker of Gemini) - and then taught the model picker to read from those credentials to decide what's actually selectable. The platform's own Case.dev models stay in the mix; native Claude and Gemini join them as first-class options whenever a key is configured.

The settings page was reshaped to match: separate sections for Case.dev, model providers, defaults, and storage, with Case Vault kept as the canonical storage backend. Three follow-up commits chasing review feedback suggest the team took the credential and provider semantics seriously before merging.