* fix: gate OSS email/password auth endpoints outside local auth mode
The /auth signup/login/me routes were mounted unconditionally, so the
SaaS deployment accepted unauthenticated signups that created oss_*
provider-id users (and auto-provisioned MPS service keys) bypassing
Stack Auth entirely.
Gate them with a router-level dependency that 404s when AUTH_PROVIDER
is not "local", rather than conditionally mounting the router, so the
OpenAPI spec and the clients generated from it stay identical across
deployment modes.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* fix: keep current user route available in stack auth
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Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
* feat: add model config v2
* chore: centralize user org selection
* chore: move preferences to platform settings
* fix: decouple org preference and ai model preferences
