Onboarding · Flows and highlights: wizard, hotspot, highlight, setup checklist

OnboardingWizard runs a first run on navigation::Wizard without its
numbered steps: "Step 2 of 4" over a bar in as many parts, the step's
title, line and content, Back and Next once ready, Finish last, and
Skip for now. Hotspot pulses on a dot that opens a tip on a press or
Enter, with Got it. FeatureHighlight names something new under a New
badge, with Try it and Not now, and rises in. SetupChecklist counts
first things to do in words and a bar, offers Start on each left, eases
a check in as one gets done, and offers Hide once all are.

navigation::Wizard now keys its buttons, steps and motion by its own id
and takes on_step and on_finish at render, failing loud without them.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tasks/ch31-43.md

@@ -198,13 +198,16 @@
 - [x] RoleSelector
 - [x] InvitationList
 
-## T37 Onboarding & Help — `src/onboarding`
+## T37a Onboarding · Flows and highlights — `src/onboarding`
+
+- [x] OnboardingWizard — on `navigation::Wizard` without its numbered steps
+- [x] WelcomeTour → `overlays::Tour` (T09b)
+- [x] Coachmark / Hotspot — Coachmark → `overlays::Spotlight`; Hotspot here
+- [x] FeatureHighlight / NewBadge — NewBadge → `data_display::Badge` with `Tone::Accent`, which FeatureHighlight wears
+- [x] Checklist (first-run tasks) → `onboarding::SetupChecklist`; a to-do list ticked by hand is `documents::Checklist`
+
+## T37b Onboarding · Help
 
-- [ ] OnboardingWizard
-- [ ] WelcomeTour → `overlays::Tour` (T09b)
-- [ ] Coachmark / Hotspot — Coachmark → `overlays::Spotlight`; Hotspot here
-- [ ] FeatureHighlight / NewBadge
-- [ ] Checklist (first-run tasks)
 - [ ] HelpTooltip
 - [ ] HelpPanel / DocsSidebar
 - [ ] KeyboardShortcutCheatsheet