Builds out two half-finished view features:
Group collapse:
- AxisEntry enum distinguishes GroupHeader from DataItem on grid axes
- expand_category() emits group headers and filters collapsed items
- Grid renders inline group header rows with ▼/▶ indicator
- `z` keybinding toggles collapse of nearest group above cursor
Hide/show item:
- Restore show_item() (was commented out alongside hide_item)
- Add HideItem / ShowItem commands and dispatch
- `H` keybinding hides the current row item
- `:show-item <cat> <item>` command to restore hidden items
- Restore silenced test assertions for hide/show round-trip
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Both functions previously returned Option despite their invariants
guaranteeing a value: active_view always names an existing view
(maintained by new/switch_view/delete_view), and axis_of only returns
None for categories never registered with the view (a programming error).
Callers no longer need to handle the impossible None case, eliminating
~15 match/if-let Option guards across app.rs, dispatch.rs, grid.rs,
tile_bar.rs, and category_panel.rs.
Also adds Model::evaluate_f64 (returns 0.0 for empty cells) and collapses
the double match-on-axis pattern in tile_bar/category_panel into a single
axis_display(Axis) helper.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Previously CellValue had three variants: Number, Text, and Empty.
The Empty variant acted as a null sentinel, but the compiler could not
distinguish between "this is a real value" and "this might be empty".
Code that received a CellValue could use it without checking for Empty,
because there was no type-level enforcement.
Now CellValue has only Number and Text. The absence of a value is
represented as None at every API boundary:
DataStore::get() → Option<&CellValue> (was &CellValue / Empty)
Model::get_cell() → Option<&CellValue> (was &CellValue / Empty)
Model::evaluate() → Option<CellValue> (was CellValue::Empty)
eval_formula() → Option<CellValue> (was CellValue::Empty)
Model gains clear_cell() for explicit key removal; ClearCell dispatch
calls it instead of set_cell(key, CellValue::Empty).
The compiler now forces every caller of evaluate/get_cell to handle
the None case explicitly — accidental use of an empty value as if it
were real is caught at compile time rather than silently computing
wrong results.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Three copies of cross_product existed (grid.rs, app.rs, persistence/mod.rs)
with slightly different signatures. Extracted into GridLayout in
src/view/layout.rs, which is now the single canonical mapping from a View
to a 2-D grid: row/col counts, labels, and cell_key(row, col) → CellKey.
All consumers updated to use GridLayout::new(model, view):
- grid.rs: render_grid, total-row computation, page bar
- persistence/mod.rs: export_csv
- app.rs: move_selection, jump_to_last_row/col, scroll_rows,
search_navigate, selected_cell_key
Also includes two app.rs UI bug fixes that were discovered while
refactoring:
- Ctrl+Arrow tile movement was unreachable (shadowed by plain arrow arms);
moved before plain arrow handlers
- RemoveFormula dispatch now passes target_category (required by the
formula management fix in the previous commit)
GridLayout has 6 unit tests covering counts, label formatting, cell_key
correctness, out-of-bounds, page coord inclusion, and evaluate round-trip.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
