- An add tile after the pictures opens the file picker, and the image
chosen joins the backgrounds on offer without being put on; it is in
force once chosen, like a shipped one. The tile is a command rather
than a choice, so a menu item beside the radios, and it isn't offered
where effects can't run.
- Kept in IndexedDB on this device and never sent anywhere, behind a
small interface, so the unit tests use an in-memory store; the
IndexedDB store itself is tested against fake-indexeddb, a new dev
dependency.
- The picker takes the focus, which the menu reads as a click elsewhere,
so the menu holds itself open until a file is chosen or the picker is
cancelled.
- A chosen image the device no longer keeps, as after its storage is
cleared, falls back to no effect once the device has said what it
keeps.
- Switching is checked between any two kinds of effect. End to end on
Chromium and Firefox: an added image shows in the preview once chosen;
once it is in force, no request carries the file or the copy kept,
which a deliberate upload fails; chosen, it is in force again after a
reload, gone once storage is cleared, and can be added again.
- Kept as given here; what can be added is checked in the commit after.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
