Wire up image field in block settings with a modal picker that
browses the media library. Fix picker thumbnails collapsing to
14px by replacing overflow:hidden with overflow:clip on grid
items (hidden sets min-height:0 in grid context). Polish media
library mobile sheet with scrim overlay and tighter spacing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Admins can now edit pages directly on the live shop by clicking the
pencil icon in the header. A sidebar slides in with block management
controls (add, remove, reorder, edit settings, save, reset, done).
Key features:
- PageEditorHook on_mount with handle_params/event/info hooks
- BlockEditor pure functions extracted from admin editor
- Shared BlockEditorComponents with event_prefix namespacing
- Collapsible sidebar: X closes it, header pencil reopens it
- Backdrop overlay dismisses sidebar on tap
- Conditional admin.css loading for logged-in users
- content_body block now portable (textarea setting + rich text fallback)
13 integration tests, 26 unit tests, 1370 total passing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>