The tour now floats over the page it describes and must be finished
before the app can be used: new readers straight after setup, returning
readers on their next visit, and anyone who saw the earlier tour. The
page behind stays visible and scrollable but inert.
"Pick a layout" (on the Checklist) and the Timeline step switch Relaxed /
Structured and New / Classic in place; the selected look is kept.
Returning readers start on Relaxed. A replay from Settings stays
optional and closable.
redesignTourSeen now records new / returning / replay / 2026-10-tour-2;
any other value means not yet taken.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
