Detail pages already render a one-line description under their heading;
the overview section headings had no slot for one. Add an optional
subtitle to SectionHeading, rendered in the same muted typography, and
wire it into the obvious top-level sections: Trends (folding its existing
right-aligned caption into the slot), Your health scores, and Your
vitals.
Every overview section now leads with a single SectionHeading above its
card: a Lucide icon in the foreground colour and an h2 title at one size
and weight. Previously the overview mixed four heading dialects — a
purple Sparkles glyph on the briefing, no icon on Trends, a white-icon
tile header on the score and vitals strips, and in-card titles buried
inside the period-in-review, cycle-summary and signals cards.
- Add SectionHeading (icon + title + optional trailing action).
- Briefing: purple icon to white; heading moves through SectionHeading.
- Trends: add a TrendingUp icon (was icon-less); subtitle becomes the
trailing action.
- Health scores + vitals: migrate the section headers off TileHeader.
- Period in review, signals of the day, device notifications: lift the
in-card title out to a heading above the card.
- Signals card min-height drops to match its slimmer body now that the
title row left the card.