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BatchUpdateView now accepts a saveDate parameter. When saving from a past-month check-in, the call site passes referenceDate.endOfMonth so snapshots are dated within the correct month instead of today. For the current month, Date() is used. Widget forward-fills missing month buckets (trend and category series) using the most recent earlier month's value, preventing gaps when a check-in is done in the following month. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>