[codex] Add locality species map exports

[karilint]

Summary

• add KML and SVG map export actions to the Species detail Locality-Species tab toolbar
• add KML-with-species-list and SVG map exports to the Locality detail Occurrences tab
• add KML-with-species-list and SVG map exports to the main /occurrence table
• harmonize Locality-Species, Locality Occurrences, and /occurrence map exports through shared occurrence export grouping/download helpers
• map occurrence rows to unique exportable localities with valid coordinates and consistent per-locality species lists
• cover the mapper and KML species-list output with focused frontend tests

Validation

• npx jest src/tests/components/LocalitySpeciesMapExport.test.ts --runInBand
• npm run lint:frontend
• npm run tsc:frontend
• commit hook: npm run lint and npm run tsc

Fixes #897