Bulk Transaction Editing

Select multiple transactions and update them all at once - saves time when managing similar transactions.

Features:

• Multi-select with checkboxes (Shift+Click for range selection)

• Bulk edit modal to update: Category, Notes (append/replace), Transfer nature, Payment type

• “All-or-none” strategy - no partial updates

• Progress indicator for large batches

• Reuses existing multi-select pattern from Budgets feature

New API endpoint: PUT /api/v1/transactions/bulk

Constraints: Only supports marking as non-transfer or transfer-out; external account transactions have restricted edits.