Fix year filter incorrectly showing transactions from all years

[Copilot]

Year filter in ledger view was displaying transactions from all years even when a specific year was selected. Root cause: statement dividers for credit card accounts were created without respecting the year filter, causing year groups to be rendered for non-selected years.

Changes

• LedgerTable.jsx: Added year filter check before processing statement dividers

  // Skip statement dividers that don't belong to the selected year
  if (selectedYear !== 'all') {
    const statementYear = format(closingDate, 'yyyy');
    if (statementYear !== selectedYear) {
      return;
    }
  }

• Added selectedYear to groupedData useMemo dependency array
• Created unit tests verifying year filter behavior for both transactions and statement dividers

Technical Context

The groupedData memo iterates through account statements to insert dividers. Previously, it processed all statements regardless of selectedYear, creating year groups in the grouped data structure even for filtered-out years. When rendered, Object.keys(groupedData) would include these unfiltered years.

The fix ensures statement dividers are only created for the selected year, preventing year groups from being added to groupedData for non-matching years.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Year Filter Not Working</issue_title>
<issue_description>When using the year filter at the top of the ledger view it does not filter the transactions correctly. Both previous and upcoming years are displayed.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Year Filter Not Working #240

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