feat(showcase): 加回 record.owner_id == os.user.id 归属门，并纠正一段已经过期的注释

合 main 之后重新实测：这条谓词现在**校验通过**。#5378 已经把答案放进
`packages/spec/src/data/injected-system-columns.ts`，让作者时校验能推导出平台注入
列 —— 我原先注释里写的「校验器拒绝它，已上报」在合并后的树上是**假话**，不能就
这么随 PR 发出去。

于是不只是改注释，而是把这条谓词作为正式标本加回来（`showcase_zoo_owner_gate`
+ 类型园里的 `showcase_zoo_t_owner`，三个记录面 + 两个视图的 `bulkActions`）。
它值得独立一条，因为 `owner_id` 是注入列而非声明字段，同时压两个面：

- 作者时：它就是 #5378 落地的活证据；
- 运行时：列表 `$select` 按对象声明字段构造，消费方若不认识平台列就会把它当拼错
  丢掉、让谓词在缺席键上 fault —— 即 objectui#3501 的 `PLATFORM_RECORD_COLUMNS`。

与既有的 `showcase_zoo_user_gate`（声明的 `user` 字段）成对：注入列与声明字段必须
门控一致。

标签当场补 zh-CN，棘轮仍是 451、`check-i18n-coverage: OK (none new)`；
`pnpm validate` exit 0、`typecheck` 通过、146 tests passed。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: baozhoutao

examples/app-showcase/src/system/translations/index.ts

@@ -452,6 +452,7 @@ export const ShowcaseTranslationBundle = {
           },
           showcase_zoo_relation_gate: { label: '查找 == 多值第一项', successMessage: '两个关系都解析到同一个 id。' },
           showcase_zoo_user_gate: { label: '指派给我（user 字段）', successMessage: '你是这条标本的指派用户。' },
+          showcase_zoo_owner_gate: { label: '归我所有（owner_id）', successMessage: '这条标本归你所有。' },
           showcase_zoo_dialect_split: { label: '仅 CEL：contains()' },
           showcase_zoo_toolbar_gate: { label: '仅登录可见（工具栏）', successMessage: '工具栏门通过。' },
           showcase_zoo_visible_string: { label: 'visible：字符串' },
@@ -469,6 +470,7 @@ export const ShowcaseTranslationBundle = {
           showcase_zoo_t_tree: { label: 'tree —— 未设置' },
           showcase_zoo_t_user: { label: 'user —— 未设置' },
           showcase_zoo_t_user_identity: { label: 'user —— 是我' },
+          showcase_zoo_t_owner: { label: 'owner_id（注入列）—— 属于我' },
           showcase_zoo_t_text: { label: 'text —— name 非空' },
           showcase_zoo_t_textarea: { label: 'textarea —— contains' },
           showcase_zoo_t_email: { label: 'email —— matches' },

examples/app-showcase/src/ui/actions/predicate-matrix.action.ts

@@ -137,18 +137,41 @@ export const ZooRelationGateAction = defineAction({
 });
 
 /**
- * The identity spelling over a declared `user` relation. `f_user` is unseeded
- * by design — `sys_user` rows come from sign-up, not seeds (see the note on
+ * **The ownership gate every app writes first**, over the platform-injected
+ * `owner_id` column. Both specimens are owned by the seeding user, so the
+ * honest reading is: this appears on all four surfaces for whoever seeded the
+ * workspace, and on none of them for anyone else.
+ *
+ * `owner_id` is injected by `applySystemFields` and is NOT among the object's
+ * declared fields, which is what makes it worth a specimen of its own on two
+ * counts. Author-time: it was rejected as `unknown field owner_id` until #5378
+ * taught the linter to derive the injected set (`packages/spec/src/data/
+ * injected-system-columns.ts`) — this predicate is the live proof that landed.
+ * Run time: a list's `$select` is built from the object's declared fields, so
+ * a consumer harvesting the fields a predicate reads has to know the platform
+ * columns too, or drop this one as a typo and leave the predicate faulting on
+ * an absent key (objectui#3501's `PLATFORM_RECORD_COLUMNS`).
+ */
+export const ZooOwnerGateAction = defineAction({
+  name: 'showcase_zoo_owner_gate',
+  label: 'Mine (owner_id)',
+  icon: 'user-check',
+  objectName: zoo,
+  type: 'script',
+  body: echo,
+  successMessage: 'You own this specimen.',
+  visible: 'record.owner_id == os.user.id',
+  locations: [...RECORD_SURFACES],
+  refreshAfter: false,
+});
+
+/**
+ * The same idea over a DECLARED `user` relation. `f_user` is unseeded by design
+ * — `sys_user` rows come from sign-up, not seeds (see the note on
  * field-zoo.object.ts) — so this is HIDDEN on both specimens out of the box and
  * becomes visible on whichever record you assign to yourself in the UI. That
- * makes it the manual half of the matrix, and the one that most resembles what
- * an app actually writes.
- *
- * Note what it is NOT written against: `record.owner_id`, the platform-injected
- * ownership column. That is the predicate every app reaches for first, and the
- * author-time validator rejects it — `unknown field owner_id` — because
- * injected columns are absent from published object metadata. Filed upstream
- * rather than worked around here.
+ * makes it the manual half of the matrix, and the pair with `owner_id` above is
+ * the point: an injected column and a declared field must gate identically.
  */
 export const ZooUserIdentityGateAction = defineAction({
   name: 'showcase_zoo_user_gate',
@@ -389,6 +412,7 @@ export const ZooTypeGates = [
   zooTypeGate('tree', 'tree — unset', 'record.f_tree == null'),
   zooTypeGate('user', 'user — unset', 'record.f_user == null'),
   zooTypeGate('user_identity', 'user — is me', 'record.f_user == os.user.id'),
+  zooTypeGate('owner', 'owner_id (injected) — mine', 'record.owner_id == os.user.id'),
 
   // ── Text family: contains() / matches(), never startsWith() ──────────────
   zooTypeGate('text', 'text — name non-empty', 'record.name != null && record.name.size() > 0'),
@@ -443,6 +467,7 @@ export const ZooTypeGates = [
 
 export const allPredicateMatrixActions = [
   ZooRelationGateAction,
+  ZooOwnerGateAction,
   ZooUserIdentityGateAction,
   ZooDialectSplitAction,
   ZooToolbarGateAction,

examples/app-showcase/src/ui/views/field-zoo.view.ts

@@ -68,6 +68,11 @@ export const FieldZooViews = defineView({
      *   • `showcase_zoo_relation_gate` — offered (Full's two lookups resolve
      *     to the same account id), and offered identically in the row `⋮` menu
      *     and the record header. Three surfaces, one verdict.
+     *   • `showcase_zoo_owner_gate` — offered to whoever seeded the workspace
+     *     (both specimens are theirs). `owner_id` is a platform-INJECTED column
+     *     that object metadata never publishes, so it is also what proves a
+     *     `$select` harvest knows the platform columns and does not drop it as
+     *     a typo (objectui#3501).
      *   • `showcase_zoo_user_gate` — absent until you assign `f_user` to
      *     yourself on a record; `sys_user` rows cannot be seeded.
      *   • `showcase_zoo_visible_*` — the three authoring forms of one
@@ -83,6 +88,7 @@ export const FieldZooViews = defineView({
      */
     bulkActions: [
       'showcase_zoo_relation_gate',
+      'showcase_zoo_owner_gate',
       'showcase_zoo_user_gate',
       'showcase_zoo_visible_string',
       'showcase_zoo_visible_tagged',
@@ -118,6 +124,7 @@ export const FieldZooViews = defineView({
       ],
       bulkActions: [
         'showcase_zoo_relation_gate',
+        'showcase_zoo_owner_gate',
         'showcase_zoo_user_gate',
         'showcase_zoo_visible_string',
         'showcase_zoo_visible_tagged',