Add label filtering to the map

[dfalling]

Summary

• Tapping a label in an element's detail view now closes the detail and adds that label as a map filter — turning the labels already shown on elements into a navigation affordance.
• Label filters combine with an active trip filter, and with each other (ALL-matched), so multiple constraints can apply at once. Each is shown as its own clearable pill.
• Trip and label pills now share one FilterPill renderer (icon + title + clear); a tag glyph stands in for a label's icon. This replaces the single-purpose TripFilterChip.
• The Elements/Search queries now request labels, and Elements accepts labels/labelsMatch so filtering happens server-side; the map also filters accumulated pins client-side to avoid a refetch flash.

Notes

• react pinned 19.2.7 → 19.2.3 (unrelated pre-existing crash): react-native@0.85.3 bundles react-native-renderer@19.2.3 and React requires an exact match, so the Renovate bump in Update react to v19.2.7 #22 crashed the app at launch before any feature code ran. CI didn't catch it since it doesn't boot the app on a device. Worth a Renovate constraint so react can't outpace react-native's renderer again.
• codegen can't run here (schema isn't committed per codegen.ts), so the generated types.ts changes were applied by hand and verified with tsc.

Test plan

• bunx tsc --noEmit, bun run lint, bun run test all pass.
• Manually verified on device: tap a label → detail animates closed → label pill appears and filters the map; combines with a trip filter; pills clear individually.