Bundle of small reconcile fixes from the W10 QA round:
- Switch tap-target padding -12 px -> -13 px closes the 1.6 px vertical short-fall to spec-strict WCAG 2.5.5 (design M1).
- animate-pulse skeleton sites in daily-briefing, trend-annotation and doctor-report dialog now carry motion-reduce:animate-none (design M2).
- Doctor-report unavailable rows render with text-muted-foreground instead of line-through so the visual reads as 'unavailable' rather than 'deleted'; the italic hint line below still carries the semantic (design M4).
- WelcomeCarousel scrollIntoView now reads scrollBehaviorForUser from src/lib/motion so all four advertised call-sites share the helper (simplifier L-1).
- Coach replay-injection audit row renamed audit.coach.replay-injection -> insights.coach.replay_injection to match the <surface>.<verb> convention across the audit ledger (simplifier L-2).
- /api/integrations/withings/resume drops the unused request param (the handler reads neither body nor headers; requireAuth scopes the call) (simplifier M-4).
- verifyRegistration body gets the same Zod boundary narrow W13 L-3 added to verifyAuthentication; SimpleWebAuthn still owns cryptographic validation (senior-dev L-1).
Marc-André Bombeck
468e38c3ef