Add Rankings tab and sector drill-down#252
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- New Rankings screen with Total / Per Capita tabs, reusing the
already-fetched /rankings/countries response (now exposed on
CountryListUIState.Success as rankingsList).
- Bottom nav grew a third destination ("Rankings", Leaderboard icon).
- Tapping a rankings row pushes CountryEmissionsScreen and forwards
the per-capita rank so the detail view still shows "Per Capita (#N)".
- Treemap legend / blocks now drive a hoisted selectedSector state in
the detail view; the Top Sources list filters to that sector, with
a title hint ("Top Sources · Power") and an "All sectors" clear chip.
- CountryEmissionsInfo gained a `name` field so the Rankings screen
can display the country label without a separate lookup.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary
Leaderboardicon) showing all countries sorted by total CO₂e or per-capita emissions, switchable via aTabRow. Reuses the/rankings/countriesresponse already fetched on app start, so there's no new network call. Tapping a row pushesCountryEmissionsScreenand forwards the per-capita rank.selectedSectorstate is now hoisted from the treemap intoCountryInfoDetailedViewSuccessand shared with the assets section. Tapping a treemap block or legend row both dims non-matching sectors and filters the "Top Emission Sources" list client-side. The list title flips to"Top Sources · <Sector>"and an "All sectors"AssistChipappears to clear the filter. Resets when the country changes.CountryEmissionsInfo.nameis now deserialized (the API was returning it; we were ignoring it). Lets the Rankings screen show country names without a separate lookup.