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).

pnpm-lock.yaml

@@ -956,9 +956,6 @@ importers:
 
   packages/client/schema-form:
     dependencies:
-      react:
-        specifier: ^18.2.0
-        version: 18.3.1
       schemastery:
         specifier: ^3.18.0
         version: 3.18.0
@@ -966,9 +963,6 @@ importers:
       '@deepseek-ai/dsh-invariants':
         specifier: workspace:^
         version: link:../../support/invariants
-      '@types/react':
-        specifier: ~18.3.1
-        version: 18.3.31
       cordis:
         specifier: ^4.0.0-rc.7
         version: 4.0.0-rc.7(@cordisjs/plugin-include@1.0.4)(@cordisjs/plugin-loader@1.0.0-rc.5)