Plain Space/x toggles the focused card and drops a range anchor there;
Shift+Space / Shift+x now selects everything from that anchor to the
focused card, sharing the same anchor (lastSelectedIdx) as Shift+click so
mouse and keyboard range-selection are interchangeable.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Adds a single window-level key dispatcher in the root layout: `g` then
c/t/f/p/s (or the digits 1–5) jump between the five sections, honouring
each section's remembered URL so you land back on the same filter and
scroll. `?` toggles a shortcuts cheat-sheet overlay. The handler stays
out of the way while typing in inputs or when a browser/OS modifier is
held. This is the foundation for the per-context keymaps (grid, viewer,
tag/filter pickers) that follow.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
H1K0