Albums: name search and sort by name / modification date

The album grid now shows a filtered + sorted view of the list:
- SQUARE (or tap the header pill) opens the keyboard to filter albums
  by name (case-insensitive); O clears the filter before going back.
- SELECT (or tap the chip) cycles the order: modified newest/oldest,
  name A-Z/Z-A. Uses the album's updatedAt from GET /api/albums.
- Cover eviction no longer drops a texture that a visible card still
  uses when two albums share the same cover photo.
- README: albums controls.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -81,6 +81,17 @@ handheld.
 | SELECT | Sync overview |
 | START | Exit |
 
+**Albums**
+
+| Button | Action |
+| --- | --- |
+| D‑pad / drag | Move selection / scroll |
+| X | Open the album |
+| □ (or tap the search bar) | Search albums by name |
+| SELECT (or tap the chip) | Sort: modified newest → oldest → name A‑Z → Z‑A |
+| △ | Reload the album list |
+| O | Clear the search, then back |
+
 **Places map**
 
 | Button | Action |