fix(map) :: ignore map coordinates that are not a pair of numbers

[81reap]

Motivation

• parseCoords returns whatever Number.parseFloat gives it, so "48.8" becomes [48.8] and "north" becomes [NaN].
• Leaflet rejects such a value, and the exception stops the map being built, so one bad row hides every other marker.

Description

• parseCoords returns undefined unless it parsed exactly two finite numbers.
• createMarker returns undefined for a marker it cannot place, and the caller skips it.
• Add tests/end-to-end/map-component.spec.ts, covering a well-formed centre and marker, a centre and a marker with no longitude, and a centre that is not numeric at all.
• Add a changelog entry.

Testing

• The browser suite passes 26 tests, five of them new.
• The new tests assert that the other markers still appear when one is dropped.
• npm test checks 37 files and reports nothing.
• no console errors on card page fails for the reason described in fix(biome.js) :: fix remaining lint issues #1366, on this branch and on the unmodified base alike.

---

GitHub cannot base a pull request on a branch that lives in a fork, so all eight target main and each one carries the commits of those above it. Review and merge them in order:

1. fix(biome.js) :: fix remaining lint issues #1366 :: fix(biome.js) :: fix remaining lint issues
2. fix(modal) :: give modal component an accessible name #1367 :: fix(modal) :: give modal component an accessible name
3. fix(map) :: ignore map coordinates that are not a pair of numbers #1368 :: fix(map) :: ignore map coordinates that are not a pair of numbers ← this PR
4. feat(chart) :: render column charts as bar charts #1369 :: feat(chart) :: render column charts as bar charts
5. fix(chart) :: align stacked series on their X values #1370 :: fix(chart) :: align stacked series on their X values
6. fix(chart) :: line series up on a category axis for every chart type #1371 :: fix(chart) :: line series up on a category axis for every chart type
7. fix(npm) :: install dependencies only once at root level #1372 :: fix(npm) :: install dependencies only once at root level
8. feat(typescript) :: typecheck browser JavaScript in CI #1373 :: feat(typescript) :: typecheck browser JavaScript in CI

[lovasoa]

Just ignoring instead of throwing makes the issue harder to debug for the developer, doesn't it? I'd be okay with logging an error to the console instead of blocking all rendering, but I'd rather not silently swallow errors

[81reap]

that's a fair call out. I will make the changes and push up a fix once I get home from work

[81reap]

turns out i had my laptop on me. pushed up a fix during my lunch break