Core Data: Move EntitiesSavedState component out of editor (rebase of #71948)

[enejb]

What / Why

This is a rebase of #71948 ("Core Data: Move EntitiesSavedState component out of editor" by @youknowriad) onto current trunk. The original PR was ~4,400 commits behind and conflicting; this branch reapplies it on top of the latest trunk.

Rebase of #71948

What the PR does

Moves the EntitiesSavedStates component, its hooks/utils, and the saveDirtyEntities action from @wordpress/editor into @wordpress/core-data:

• entities-saved-states/* component → core-data/src/components/entities-saved-states/
• get-template-info.js, get-template-part-icon.js utils → core-data/src/utils/
• saveDirtyEntities action → core-data/src/private-actions.js
• Exposed via core-data private APIs (EntitiesSavedStates, EntitiesSavedStatesExtensible, getTemplateInfo, getTemplatePartIcon, useEntitiesSavedStatesIsDirty)
• editor re-exports EntitiesSavedStates / useEntitiesSavedStatesIsDirty for back-compat; consumers updated to read getTemplateInfo/getTemplatePartIcon from core-data.

Notable rebase decisions (please verify)

1. saveDirtyEntities kept trunk's newer logic. The moved action uses trunk's current implementation (await onSave() from Editor: saveDirtyEntities: don't allow onSave to filter records #79850, successNoticeContent param) rather than the older version in the original PR.
2. __unstableMarkLastChangeAsPersistent() kept functional. Original PR commit 2 ("Remove useless code") deleted this blockEditorStore call. I instead kept it active in the core-data version to preserve trunk's exact save behavior (core-data already depends on block-editor here). Commit 2 was therefore skipped. This is the main thing to confirm.
3. New trunk consumers fixed: post-excerpt/panel.js and sidebar-navigation-screen-patterns now pull getTemplateInfo/getTemplatePartIcon from core-data; restored a blockEditorStore import in editor/store/private-actions.js that the move had dropped.
4. Trunk had independently added the wp-core-data style registration in client-assets.php, so that part is already present.

Testing done

• core-data unit tests: 217 pass (incl. moved use-is-dirty, private-actions, private-selectors)
• editor store selector tests: 145 pass
• Lint: only pre-existing trunk warnings remain (verified 1:1 against trunk)
• API docs regenerated (docs:api-ref)

Full editor/site-editor e2e (save flows, global styles save panel) still worth a manual pass.

[youknowriad]

For me this is a one of the two good paths forward, so I'm approving.

[Copilot]

Pull request overview

Moves the “entities saved states” UI and related save/template helpers out of @wordpress/editor into @wordpress/core-data, exposing them via core-data private APIs while keeping editor re-exports for backwards compatibility.

Changes:

• Relocates EntitiesSavedStates (and hook) plus related styles into core-data, and wires saveDirtyEntities as a core store private action.
• Switches editor/edit-site consumers to read getTemplateInfo / getTemplatePartIcon (and EntitiesSavedStates) from core-data private APIs.
• Updates core-data build deps/TS refs and adjusts private API documentation.

Reviewed changes

Copilot reviewed 27 out of 32 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/editor/src/utils/index.js	Stops re-exporting getTemplatePartIcon from editor utils.
packages/editor/src/style.scss	Removes entities-saved-states styles from editor bundle.
packages/editor/src/store/selectors.js	Switches template helpers to core-data private APIs.
packages/editor/src/store/private-selectors.js	Switches template icon helper to core-data private APIs; removes meta-change selector.
packages/editor/src/store/private-actions.js	Removes saveDirtyEntities from editor private actions (moved to core-data).
packages/editor/src/private-apis.js	Removes EntitiesSavedStatesExtensible and template helper from editor private APIs.
packages/editor/src/components/save-publish-panels/index.js	Uses core-data private EntitiesSavedStates instead of editor component import.
packages/editor/src/components/post-excerpt/panel.js	Uses core-data private getTemplateInfo instead of editor util.
packages/editor/src/components/post-card-panel/index.js	Uses core-data private getTemplateInfo instead of editor util.
packages/editor/src/components/index.js	Re-exports EntitiesSavedStates + hook from core-data private APIs for back-compat.
packages/editor/src/components/document-bar/index.js	Uses core-data private getTemplateInfo instead of editor util.
packages/editor/README.md	Regenerates API docs; EntitiesSavedStates + hook now show “Undocumented declaration.”
packages/edit-site/src/components/sidebar-navigation-screen-patterns/index.js	Switches template-part icon helper to core-data private APIs.
packages/edit-site/src/components/save-panel/index.js	Switches entities-saved-states imports/unlocks from editor to core-data.
packages/edit-site/src/components/save-button/index.js	Dispatches saveDirtyEntities from core store; reads dirty-state hook from core-data private APIs.
packages/edit-site/src/components/editor/use-editor-title.js	Switches template helper unlock from editor to core-data private APIs.
packages/core-data/tsconfig.json	Adds TS project references needed by moved component/utilities.
packages/core-data/src/utils/test/get-template-info.js	Adds unit tests for the moved getTemplateInfo helper.
packages/core-data/src/utils/get-template-part-icon.js	Adds moved getTemplatePartIcon helper.
packages/core-data/src/utils/get-template-info.js	Adds moved getTemplateInfo helper (currently needs a guard/defaults fix).
packages/core-data/src/style.scss	Adds core-data stylesheet entry for entities-saved-states styles.
packages/core-data/src/private-apis.ts	Exposes moved component/hook/utils via core-data private APIs.
packages/core-data/src/private-actions.js	Adds saveDirtyEntities to core-data private actions.
packages/core-data/src/components/entities-saved-states/test/use-is-dirty.js	Updates tests after moving hook into core-data.
packages/core-data/src/components/entities-saved-states/style.scss	Adds entities-saved-states styles under core-data.
packages/core-data/src/components/entities-saved-states/index.js	Moves EntitiesSavedStates + extensible variant into core-data.
packages/core-data/src/components/entities-saved-states/hooks/use-is-dirty.js	Updates hook to select from STORE_NAME instead of importing core-data store object.
packages/core-data/src/components/entities-saved-states/entity-type-list.js	Updates entity list to select from STORE_NAME.
packages/core-data/src/components/entities-saved-states/entity-record-item.js	Updates template-title lookup to use moved getTemplateInfo and core store selectors.
packages/core-data/package.json	Adds dependencies required by the moved component/utilities (components/icons/notices/etc, clsx).
package-lock.json	Lockfile update for the core-data dependency additions.
docs/private-apis.md	Documents new core-data private exports (needs follow-up doc accuracy fixes).

[github-actions]

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Co-authored-by: youknowriad <youknowriad@git.wordpress.org>
Co-authored-by: enejb <enej@git.wordpress.org>

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[manzoorwanijk]

This file was moved but not all of its dependencies were moved. @wordpress/base-styles needs to be declared.