Earlier convert-locales.py was line-based + single-quote-only, missing
~16 keys per locale where:
- the value spans onto the next line ('long.key.name':\n 'value')
- the value uses double quotes for English contractions ('topbar.dontSave': "Don't Save")
Switch to a regex.finditer over the whole file with multi-line +
double-quote alternation. All 15 locales now report 706 keys each,
matching the TS source (apps/web/src/i18n/locales/*.ts).
Stop-hook: 'locale import is incomplete'.