Add multi-language support (i18n) #8
Description
Problem
The app currently has hardcoded English strings in some places and Dutch string resources in others. There is no way for users to switch languages.
Proposal
- Audit all user-facing strings and ensure they go through
strings.xml - Add translations for at least Dutch (
values-nl/strings.xml) - Follow Android's standard localization approach with resource qualifiers
Acceptance criteria
- All user-facing strings use
stringResource()/getString() - At least one additional language supported
- App respects device language setting