- Subpages shown as compact visual tiles in a grid (like folders)
- Each tile shows the first album's cover image + name + album count
- Click a tile to expand/edit that subpage's details below
- Active tile highlighted with accent border
- Only one subpage expanded at a time — no more endless scrolling
- Move arrows changed to ← → (horizontal) matching the grid layout
- Smooth slide-down animation when expanding a subpage
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