Template parts use string IDs (slugs like 'twentytwentyfive//footer')
rather than numeric IDs. The post-edit route was only handling
numeric IDs, causing 404s when navigating to edit template parts.

…vigation edit

Adapted from Jerry's PR #75791 approach, but with render-time unlock instead of
module-level unlock because wp-block-library is loaded lazily via useEditorAssets()
in the Extensible Site Editor.

- Access block-library private APIs via window.wp.blockLibrary.privateApis at render time
- Add NavigationLinkControls + Popover for editing existing navigation links
- Keep AdditionalBlockContent + LinkUI for newly inserted blocks
- Remove file-copying workaround in favor of proper private API usage

Replace breadcrumbs with title containing back button and menu name.
Adds subtitle for editing context.

- Add Badge component to show "Active (X locations)" or "Inactive" status
- Create useNavigationStatus hook to count template part usage per menu
- Preload template parts and fallback navigation in route loader
- Display badges inline with navigation menu titles in list view

- Use getBlockLibraryApis() to access both NavigationLinkUI and
  NavigationLinkControls at render time (runtime window lookup)
- NavigationLinkUI handles the appender/new-link flow via additionalBlockContent
- NavigationLinkControls + Popover handles clicking an existing link to edit it
- handleSelect opens the edit popover for blocks with a URL, falls through
  to offCanvasOnselect for blocks without one

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

- Default previewSize to max (430) so previews start full-width
- Wrap DataViews in a div that adds --full-width modifier when at max
- Override dataviews-view-grid__row grid-template-columns to 1fr
- Remove aspect-ratio: 1/1 and forced height from grid media so
  previews shrink to fit their content height (e.g. a header template
  part shows as a thin strip, not a tall square)
- Cap with max-height: 300px to prevent very tall templates overflowing

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

… editor

Reverts all edit-site and block-library changes that were introduced by
earlier cherry-picks but belong only in the routes module. The default
(trunk) navigation experience is now unchanged.

Deleted files are leftover from cherry-picks:
- navigation-menu-detail.js
- navigation-menu-template-areas.js
- use-navigation-menus-used-in.js

Adds an optional `isContentOnly` prop to the shared `Controls` component
so callers can override the store-derived blockEditingMode check without
side effects on existing usages. The v2 extensible editor passes
`isContentOnly` to hide description and rel fields by default in the
link edit popover, matching the trunk navigation editor behaviour.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

…one navigation route

Remove stale references to routes/navigation-edit and
routes/navigation-list which were combined into routes/navigation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Show "Navigation / [Menu Name]" breadcrumbs instead of a back arrow
button when editing a navigation menu. The "Navigation" link navigates
back to the menu list.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Use the same font-size, weight, family, line-height, and color as the
Page component's header title so the breadcrumbs blend with the section.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

This reverts commit f77292e.

Target all link states (default, visited, hover, focus) to override
browser/WordPress default blue link color.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Replace the Button component (variant="link") with a plain <button>
element and use `all: unset` to fully reset browser styles, ensuring
the text color inherits from the parent breadcrumb container.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

- Filter by action.id 'edit' (not 'edit-navigation') to actually
  hide the edit action in the breadcrumb menu
- Use margin-left: auto to push the kebab to the right of the panel

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Make the breadcrumb kebab menu right-aligned by expanding the header's
nested flex containers. Navigate back to navigation list after trashing
a menu, and to the edit screen for newly duplicated menus. Fix invalid
design system tokens and merge duplicate imports.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

When a navigation menu isn't used in any template parts, show a message
with an "Add to template part" button. The modal shows template part
previews with checkboxes; applying updates the first navigation block's
ref in selected parts. The preview area reactively updates by reading
pending entity edits for template part matching.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

…dy-used parts

Move the "Add to template part" button next to the dropdown so it's
always visible. Filter out template parts that already reference the
current navigation menu from the modal. Read pending entity edits so
the preview updates immediately after assigning a menu.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Read edited entity content (pending unsaved edits) for template parts
so the preview area immediately reflects the new navigation ref after
applying from the "Add to template part" modal.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Use a max-height on the scroll area so the footer with Cancel/Apply
buttons stays visible without needing to scroll to the bottom.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Show the "Create page" button for navigation links without a type
(new/custom links), not just page-type links. Also guard against
undefined content being passed to parse() in template part previews.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>