fix(spec): regenerate skill references, keep the error map internal (#3405)

Two more generated-artifact gates behind `check:docs`, both tripped by the same
commit:

- `check:skill-refs` — importing `shared/suggestions.zod.ts` from
  `ui/action.zod.ts` pulls it into the transitive reference set of the
  objectstack-data / -ui / -platform skills. Regenerated via `gen:skill-refs`;
  the diff is the one expected line per skill, and `action.zod.ts` still
  resolves to "Action Parameter Schema", confirming the JSDoc-order fix held.

- `check:api-surface` — `actionParamUnknownKeyError` was exported, which added
  it to the package's public API. It has no caller outside its own module, so
  the export was unnecessary: unlike `strictVisibilityError`, which is shared
  across the view/page schemas, this map is wired into exactly one schema.
  Made it module-private; the public API surface is now unchanged by this PR.

All ten `check:*` gates in packages/spec pass locally, alongside 258 files /
6716 tests and a clean `tsc --noEmit`.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LkvDs4y4gveyB5NJZKxaZt

Author: claude

packages/spec/src/ui/action.zod.ts

@@ -106,7 +106,7 @@ const aliasProbe = (key: string): string => key.toLowerCase().replace(/[_\-\s]/g
  * *fixable*: it names the offending key(s) and, when one is a recognisable
  * spelling of a declared key, points at the canonical one.
  */
-export const actionParamUnknownKeyError: z.core.$ZodErrorMap = (issue) => {
+const actionParamUnknownKeyError: z.core.$ZodErrorMap = (issue) => {
   if (issue.code !== 'unrecognized_keys') return undefined;
   const keys = (issue as { keys?: readonly string[] }).keys ?? [];
   const suggestions = keys.flatMap((key) => {

skills/objectstack-data/references/_index.md

@@ -27,6 +27,7 @@ from `node_modules` — there is no local copy in the skill bundle.
 - `node_modules/@objectstack/spec/src/shared/http.zod.ts` — Shared HTTP Schemas
 - `node_modules/@objectstack/spec/src/shared/identifiers.zod.ts` — System Identifier Schema
 - `node_modules/@objectstack/spec/src/shared/protection.zod.ts` — Package-level metadata protection (ADR-0010 §3.7 — Phase 4.3)
+- `node_modules/@objectstack/spec/src/shared/suggestions.zod.ts` — "Did you mean?" Suggestion Utilities
 - `node_modules/@objectstack/spec/src/ui/action.zod.ts` — Action Parameter Schema
 - `node_modules/@objectstack/spec/src/ui/i18n.zod.ts` — I18n Object Schema
 - `node_modules/@objectstack/spec/src/ui/responsive.zod.ts` — Breakpoint Name Enum

skills/objectstack-platform/references/_index.md

@@ -32,6 +32,7 @@ from `node_modules` — there is no local copy in the skill bundle.
 - `node_modules/@objectstack/spec/src/shared/expression.zod.ts` — Expression Protocol
 - `node_modules/@objectstack/spec/src/shared/identifiers.zod.ts` — System Identifier Schema
 - `node_modules/@objectstack/spec/src/shared/protection.zod.ts` — Package-level metadata protection (ADR-0010 §3.7 — Phase 4.3)
+- `node_modules/@objectstack/spec/src/shared/suggestions.zod.ts` — "Did you mean?" Suggestion Utilities
 - `node_modules/@objectstack/spec/src/system/tenant.zod.ts` — Tenant Schema (Multi-Tenant Architecture)
 - `node_modules/@objectstack/spec/src/ui/action.zod.ts` — Action Parameter Schema
 - `node_modules/@objectstack/spec/src/ui/app.zod.ts` — Base Navigation Item Schema

skills/objectstack-ui/references/_index.md

@@ -34,6 +34,7 @@ from `node_modules` — there is no local copy in the skill bundle.
 - `node_modules/@objectstack/spec/src/shared/http.zod.ts` — Shared HTTP Schemas
 - `node_modules/@objectstack/spec/src/shared/identifiers.zod.ts` — System Identifier Schema
 - `node_modules/@objectstack/spec/src/shared/protection.zod.ts` — Package-level metadata protection (ADR-0010 §3.7 — Phase 4.3)
+- `node_modules/@objectstack/spec/src/shared/suggestions.zod.ts` — "Did you mean?" Suggestion Utilities
 - `node_modules/@objectstack/spec/src/ui/i18n.zod.ts` — I18n Object Schema
 - `node_modules/@objectstack/spec/src/ui/responsive.zod.ts` — Breakpoint Name Enum
 - `node_modules/@objectstack/spec/src/ui/sharing.zod.ts` — Sharing & Embedding Protocol