feat(ui-models)!: single-key hand-written provider editors with derived credential references

The Models page drops the generic schema renderer and the visible
environment-variable field: each editor is a curated per-family card whose
primary input is one write-only API key stored under a derived
<ROUTE>_API_KEY reference (recorded as apiKeyEnv in the pi-ai profile), an
unkeyed whole-section provider opens as its setup card, and the collapsed
customized-settings fold carries baseURL/reasoningEffort (deepseek) or
reasoning (pi-ai). dsh-client-schema-form reduces to the schema/draft model
layer (no React).

packages/client/schema-form/src/invariant.ts

@@ -15,10 +15,10 @@ export const name = 'client-schema-form-invariant'
 export const inject = ['invariants']
 
 /**
- * No runtime invariant: a pure React rendering library — it emits no cordis
- * events and owns no cross-plugin mutable relation; draft immutability,
- * schema rehydration, and control/edit round trips are asserted directly by
- * this package's component and model specs.
+ * No runtime invariant: a pure schema/draft helper library — it emits no
+ * cordis events and owns no cross-plugin mutable relation; draft
+ * immutability, schema rehydration, and path-edit round trips are asserted
+ * directly by this package's model specs.
  */
 const install: InvariantInstaller = () => {}