The filter shows WHERE the gap is; it could not say which part of it is biggest. The
3,444 groups with nothing were reachable only by tapping dots until a large one turned
up, which is not how anyone chooses a field.
"See the 40 largest" now opens a ranked list in the sheet — the slot the country and
group views already use, so no new geometry and no new collision with the control rail.
Sorted by population, because choosing where to go is choosing how many people are
behind the decision. Tapping a row flies there and opens that group. Fly first, THEN
open: opening sets `selected`, which swaps the sheet away from the list, so the other
order loses the map movement behind a re-render.
THE LIST EXPOSED A REAL DEFECT. The largest gaps are exactly the groups with no entry
in any pool, so they had no record to carry a language name and the sheet rendered
"Language: (blank) cjy" for a 60-million-speaker group. Every language is now named
from the people-group dataset, creating the entry where no pool has one: 2,251 codes
are named-only — the language is known, nothing was found for it anywhere.
That makes "has a code entry" ~100% by construction, so it is relabelled in the build
output as naming and NOT coverage. Coverage is the line under it and still reads 8,935
of 12,379, 72.2%. A metric that reaches 100% because its meaning changed is worse than
no metric.
Verified on the served tree: 40 rows, populations strictly descending 60,310,000 ->
974,000 so "largest" is not a claim taken on trust; tapping row 1 moves zoom 1.3 -> 4.2
and opens Han Chinese Jinyu, whose scripture_url and film_url are empty and whose
Door43 list is empty — so the list is not mislabelling groups that have something. 200
sampled zero-resource groups all name their language, where the screenshot before this
change shows that field blank. Pins, table, deep-link and filter probes all still pass,
and the full a11y sweep passes 810 of 810 buttons across 21 leaf pages.
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