i18n: translate all hardcoded Italian strings in app.js
Added 49 new translation keys to all 3 language files (IT/EN/DE)
and wired every hardcoded Italian label/toast/hint in app.js to use
the t() translation function.
Sections covered:
- scale: density_hint, ml_hint, weight_detected, weight_too_low,
stable, auto_confirm
- dashboard: banner review titles/details, prediction rate/days/
direction texts, finished-zero/expected/check,
anomaly phantom/ghost titles and details
- action: have_title, add_more_sub, use_qty_sub, throw_btn/sub, edit_sub
- add: purchase_type_label, new_btn, existing_btn,
remaining_label/hint/full/half
- use: throw_title, throw_all, throw_qty_label/hint, throw_partial_btn
- shopping: bring_badge, add_urgent_toast, migration_done,
added_to_bring, added_to_bring_skip, all_on_bring,
removed_sufficient (was a complex plural, now uses key)
- toast: product_updated, thrown_away, thrown_away_partial
- confirm: kiosk_exit
- WEEK_DAYS array now uses t('days.*') keys
dadaloop82
8a16307b39