- Prompt history closes the viewer and, when its target is the route
already shown, re-renders it as the concept's go() does (navigateTo
plus a router refresh event), instead of doing nothing.
- The viewer details' disclosure summaries and "Download original" keep
40px targets on coarse pointers (#249 D34), as TESTING.md promises.
- Drop the dead `.prompt-positive` rules and merge the two
`pre.prompt-text` rules.
- TESTING.md records the side panel's D20/D21 deviations.