Edward Langley da076eadc8 test(model,ui): add tests for precision and cat tree
Add unit tests for model precision and category tree rendering:

- `src/model/types.rs` : Added `formula_chain_preserves_full_precision` to
  ensure formulas use full `f64` precision for calculations, even when
  display is rounded.
- `src/ui/cat_tree.rs` : Added comprehensive tests for `build_cat_tree` ,
  covering empty models (virtual categories), expanded/collapsed states,
  and item rendering.

Co-Authored-By: fiddlerwoaroof/git-smart-commit (unsloth/gemma-4-26B-A4B-it-GGUF:UD-Q5_K_XL)
2026-04-11 00:06:50 -07:00
2026-04-02 16:21:45 -07:00
2026-04-11 00:06:38 -07:00
2026-04-11 00:06:49 -07:00
2026-04-02 11:34:22 -07:00
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