docs(spec): the TranslationDataSchema comment counts sixteen per-app groups, not fifteen (#27033)

Follow-up of #26170

## What changes

One word in a TSDoc comment.
`packages/spec/src/system/translation.zod.ts`, on
`TranslationDataSchema`, said "Fifteen groups: every group the platform
bundle declares EXCEPT `settings`". It now says "Sixteen groups".

## Why

The round-4 contract review on #26831 (comment 6458660736) found this
one stale count. When #26831 merged main's `books` group (#26819), both
parents had made the same Fourteen to Fifteen edit on this line, so git
kept it without a conflict, and the hand pass that moved the other
spelled counts did not reach it. At this head
`appTranslationDataShape()` has sixteen keys, and the same comment block
already calls the platform face "the seventeen-group face".

The line is a code comment only. It is not a `describe`, a refusal
message, the JSON Schema or a generated doc, and no gate reads it.

## Verification

- `git diff origin/main` is one line in `translation.zod.ts` plus the
patch changeset. `check-changeset-no-major` and `check-empty-changeset`
pass locally.
- `appTranslationDataShape()` at this head lists sixteen keys: objects,
picklists, apps, messages, globalActions, dashboards, datasets, reports,
pages, flows, hooks, positions, permissions, books, metadataForms,
settingsCommon.
- The pre-push hook `check:commit-card-trailers` passed.

Clause-②: no
Metadata-protocol: none
Skills-docs: none, because no `skills/**` file states the per-app group
count.

## Human Minimum

- [x] 1. Schemas start as Zod; `packages/spec` holds no runtime logic.
- [x] 2. Every name I added uses the casing for its kind (no names
added).
- [x] 3. No formatter ran; `pnpm lint` is left to CI for a one-word
comment edit.
- [x] 4. One issue, one branch off an up-to-date `main`, one pull
request.
- [x] 5. A change that publishes carries a changeset, and both
declaration lines are filled in here and in the changeset
(`.changeset/26170-translation-data-comment-count.md`,
`@objectstack/spec` patch).
- [x] 6. `packages/spec` touched: its generated artifacts are
regenerated and committed (a comment moves no generated artifact).
- [x] 7. No hand edits to `content/docs/references/`,
`packages/*/CHANGELOG.md` or `content/docs/releases/`.
- [x] 8. Title, body and comments are in English.
- [x] The *Before Submitting* list in CONTRIBUTING.md is done.

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: objectstack-fleet[bot]

.changeset/26170-translation-data-comment-count.md

@@ -0,0 +1,10 @@
+---
+'@objectstack/spec': patch
+---
+
+docs(spec): the `TranslationDataSchema` TSDoc counts sixteen per-app translation groups, not fifteen
+
+Clause-②: no
+Metadata-protocol: none
+
+The comment on `TranslationDataSchema` said "Fifteen groups" after the `hooks` and `books` groups both landed; the per-app bundle (`appTranslationDataShape()`) has sixteen. Comment only: no schema, describe, refusal message or generated artifact changes.

packages/spec/src/system/translation.zod.ts

@@ -2079,7 +2079,7 @@ const platformSettingsShape = () => ({
  * One locale of a PER-APP translation bundle — `stack.translations`, and
  * everything {@link defineTranslationBundle} builds.
  *
- * Fifteen groups: every group the platform bundle declares EXCEPT `settings`,
+ * Sixteen groups: every group the platform bundle declares EXCEPT `settings`,
  * which is platform-only and is refused here by name with
  * {@link PER_APP_SETTINGS_PLATFORM_ONLY} as the remedy. See
  * {@link PlatformTranslationDataSchema} for the seventeen-group face and for why