Add prune_empty feature to hide empty rows/columns in pivot mode.
View gains prune_empty boolean (default false for backward compat).
GridLayout::prune_empty() removes data rows where all columns are
empty and data columns where all rows are empty.
Group headers are preserved if at least one data item survives.
In records mode, pruning is skipped (user drilled in to see all data).
EditOrDrill command updated to check for regular (non-virtual)
categories when determining if a cell is aggregated.
Co-Authored-By: fiddlerwoaroof/git-smart-commit (unsloth/Qwen3.5-35B-A3B-GGUF:Q5_K_M)
Add view navigation history with back/forward stacks (bound to < and >).
Introduce CategoryKind enum to distinguish regular categories from
virtual ones (_Index, _Dim) that are synthesized at query time.
Add DrillIntoCell command that creates a drill view showing raw data
for an aggregated cell, expanding categories on Axis::None into Row
and Column axes while filtering by the cell's fixed coordinates.
Virtual categories default to Axis::None and are automatically added
to all views when the model is initialized.
Co-Authored-By: fiddlerwoaroof/git-smart-commit (unsloth/Qwen3.5-35B-A3B-GGUF:Q5_K_M)
Categories on the None axis are excluded from the grid and cell keys.
When evaluating cells, values across hidden dimensions are aggregated
using a per-measure function (default SUM). Adds evaluate_aggregated
to Model, none_cats to GridLayout, and 'n' shortcut in TileSelect.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
