Reading Library V4.3.8 — Interface refinement

This release keeps the V4.3.7 persistence, regional PDF-page and UK/US localisation fixes and refines three teacher-facing areas.

1. Reading Framework
- Restores the cleaner sequence-style framework page.
- Each framework entry clearly identifies the overview/day, explains what the slide covers and shows its teaching focus.
- Open slide launches directly into the relevant full-screen framework slide.
- Open full framework launches the complete seven-slide slideshow.
- The seven framework artwork files remain built into Reading Library.

2. Discover search
- Search matches now appear directly beneath the search/filter panel as soon as a search is entered.
- Trending Resources and Recently Added remain the default discovery view before a search begins.
- Clearing the search restores the normal highlights view.

3. Resource materials
- Source filenames are no longer shown on Resource Materials cards.
- This prevents internal or region-specific filenames being mistaken for the displayed resource edition.
- Open and Download continue to use the correct underlying file automatically.
