Grid view currently shows thumbnails at a single fixed size. Some users want bigger tiles to inspect images, others want smaller tiles to see more files at once. Add a size control (slider or stepped selector — small / medium / large) so the user can scale grid tiles to taste. The chosen size should persist across sessions (localStorage UI pref, same pattern as the other stashhub.* prefs).
Out of scope: Table view; focus mode (separate task).
Acceptance:
- Grid view has a visible size control (slider or stepped buttons).
- Adjusting it re-flows the grid live.
- Choice persists across reloads.
Source: User feedback session, 2026-05-08.