Changelog: Wellness Hub v8

Standards compliance pass (in place on the latest version, no design or behaviour change)

Done under the AGENTS.md exception for the latest, unreviewed-for-standards version. Copy, layout, brand look and flows are unchanged; the only visible differences are slightly darker secondary text, 44 px minimum touch targets, and a new dark theme that follows the system setting.

Accessibility

Responsive

Not changed

Copy, data, brand look, the flip cards, the AI chat call, the disclaimer gate, v7 and earlier versions.