Generalize the report category collapse from level-1-only to every hierarchy
level, on the three hierarchical report tables (real-vs-real Compare,
real-vs-budget Compare, Trends by category). Visibility is now decided by an
ancestor walk, not by row adjacency, so it is independent of row order (the
level-ordered budget grid emits a non-DFS order).
- collapsibleRows: rewrite visibleRows as an ancestor walk (a row is hidden iff
any ancestor is collapsed); add parentKeyOf + injective `p:` keys;
collapsibleKeys returns all parents (any depth); extract the pure, tested
isCollapsedFor polarity helper; MAX_TREE_DEPTH cycle guard.
- useCollapsibleGroups: persist in user_preferences (per-profile, destroyed with
the profile) instead of localStorage; storageKey nullable (no persistence);
options.defaultExpanded; async hydration (no flash); collapseAll(rows).
- 3 tables: fix BOTH gates (collapsed flag + button) isTopParent -> isParent, add
parentKeyOf accessors, aria-level on parent rows.
- Delete dead CategoryTable.tsx (0 imports).
- Tests: rewrite collapsibleRows.test.ts (BFS==DFS masking, cycle guard,
cross-section ancestor, "(direct)" leaf, polarity); extend overTimeTableModel
fixture to 3 levels with cascade assertions.
Collapse stays purely visual: subtotals and result lines are computed from raw
rows, never from visible rows.
Resolves#288
Generated autonomously by /autopilot run of 2026-07-15
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Renders the trends-by-category table from the #264 id-keyed tree as an indented
parent/child hierarchy (parity with ComparePeriodTable): top-level parents carry
a chevron and fold their subtree down to a subtotal, with an "expand all /
collapse all" button. Collapsed by default; expansion state is persisted under a
trends-specific localStorage key (reports-trends-expanded), distinct from the
comparable tables. The "result before transfers" line is interleaved before the
transfers section instead of sitting at the bottom.
Collapse is purely visual: section subtotals, before/net results and totals come
from computeOverTimeResults over the raw tree, never the visible rows.
New pure module overTimeTableModel.ts (section grouping + collapse accessors)
keeps the component thin and unit-testable without a React render harness;
overTimeResults.ts is left untouched. 8 new tests; build + 728 vitest green.
Resolves#265
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
