BUG FIX: parseDecimal ignored locale mismatch between currency and device.
CurrencyFormatter.locale(for: "EUR") could return any EUR locale (e.g.
en_IE with decimal='.'), causing "408857,62" to be parsed as 40,885,762.
New CurrencyFormatter.parseUserInput() uses digit-position detection:
a separator followed by ≤2 digits at the end is decimal, otherwise
it is a thousands separator. Fully locale-independent.
FEATURE: Contribution field now always visible in AddSnapshotView.
Previously gated behind inputMode == .detailed; now a toggle available
regardless of account mode.
FEATURE: BatchUpdateView pre-fills each text field with the source's
current value so the user only edits what changed. Adds an optional
contribution field per source row, persisted on save.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
alexandrev-tibco
alexandrev