Render the real-vs-real comparable report as a parent/child category tree
with subtotal rows, mirroring the budget report — rows grouped into
expense/income/transfer sections with per-section and grand totals and a
subtotals-on-top/bottom toggle. The compare service now builds the tree on
top of the flat per-category deltas, so leaf-category figures are unchanged
and the #243 transfer netting is preserved (a balanced transfer group
subtotals to ~0, i.e. the group's net).
- reportService: buildCompareTree() synthesizes subtotal rows from the flat
leaves + category metadata; getCompareMonthOverMonth/YoY return the tree
(COMPARE_DELTA_SQL and rowsToDeltas untouched).
- CategoryDelta gains optional parent_id/is_parent/depth/category_type.
- ComparePeriodTable: sections, depth indentation, reorderRows toggle,
section/grand net totals.
- Cartes top-movers and ComparePeriodChart filter to leaf rows only.
- reorderRows constraint loosened to the two fields it reads.
- i18n (FR+EN) section labels; CHANGELOG entries.
Resolves#247
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>