The step and the Models page both asked one question of a join that
describes every provider: is deepseek-official's credential stored? A user
who configured some other route was taken over on every blank session, and
the DeepSeek setup card opened over them on every visit to Models with a
Cancel that could not close it — while clearing the add card's draft,
because it shared the row-editor close handler.
providerUsable(row) now answers what both surfaces need: the route is
registered and whatever credential its profile names is stored. Readiness
(renamed onboardingReadiness) ends on any usable row, needsSetup takes the
same fact, and each card kind owns its own close handler.
Fixes#2325
A test file under packages/client now says which face it covers:
`*.client.spec.{ts,tsx}` and its `*.client.{ts,tsx}` helpers belong to the
Client aggregate, `*.host.spec.ts` to the host aggregate. The carrier's four
node-half specs take the Host suffix.
The two suffixes are mutually exclusive, so each aggregate excludes the
other's and both keep one broad test glob: `exclude` wins over `include`, and
`packages/client/**` no longer has to be excluded wholesale from the host
program with per-file `files` entries carved back out of it. A Host-face spec
that reaches only Host source therefore needs no cross-face project
reference, which the split-project rule rejects.
vitest still discovers every file through `**/*.spec.{ts,tsx}`.
