Review fixes on top of #1528:
- Narrowing the age window only removes markers; a product loaded with a
narrower window is reloaded when the window widens again. Fixes markers
missing after 7d -> 1d -> 7d and avoids reparsing every KMZ on narrowing.
- A wider window over the same edition keeps the open report card.
- Date-only event dates cover their whole UTC day, so 1d still shows
yesterday's reports.
- The age options are one labelled "Event age" radio switch (row
`segmented` control, as FIRMS confidence) instead of toggle chips mixed
with the product chips.
- Un-nest the per-product age test; QA compares data-source counts with the
live defaults instead of a hard-coded 2.
Co-Authored-By: Claude Opus 5.5 <[email protected]>