## CI Validation
`cargo xtask ci` completed successfully.
<details>
<summary>Build Warning</summary>
```text
warning: variants `At` and `Unknown` are never constructed
--> crates\ui-egui\src\backstage.rs:416:5
```
This warning appears to be pre-existing and is unrelated to the changes introduced in this PR. As it falls outside the scope of the current work, no changes were made to address it.
</details>
The build completed successfully, including the `wasm32-unknown-unknown` target checks.
```text
wasm32-unknown-unknown check (gridcraft-calc, gridcraft-chart, gridcraft-core, gridcraft-engine,
gridcraft-formula, gridcraft-functions, gridcraft-model, gridcraft-numfmt,
gridcraft-pdf, gridcraft-web, gridcraft-xlsx): ok
```
<details>
<summary>CI Parity</summary>
```text
CI summary:
ok fmt
ok clippy
ok test
ok assets
ok layers
ok wasm
```
</details>
### Summary
This change centralizes the translation of user-facing error messages in the UI layer while preserving the original error payloads for machine consumption and AI-agent integrations.
### What changed
- Added a centralized error-translation path in `i18n.rs`.
- The UI now translates only the final display text, instead of altering the underlying engine or protocol error payload.
- If a translated string is not available, the original message is kept as a fallback, avoiding broken or overly-simplified output.
- The translation logic is applied at the presentation layer, not at the source of the error.
### Updated call sites
- Error and alert rendering in `widgets.rs`
- Dialog error presentation in `dialogs.rs`
- Print and feedback failures in `printing.rs`
- Top-level UI error handling in `lib.rs`
### Design intent
- Keep the raw engine errors intact for scripts, control channels, and AI/agent integrations.
- Present a clearer, localized message only to end users.
- Avoid modifying dictionary files or adding new translation entries to the global catalog unnecessarily.
- Keep the behavior consistent with the project’s accessibility and internationalization goals.
### Validation
- The focused i18n test passed successfully.
- The relevant UI test suite passed successfully.
- The repository-required CI gate was run and completed without failures according to the latest verification output.
The grid's look() and print's cell_look() layered a rule's fill, font and
borders onto the cell style but not its num_fmt, so a cell under a rule with a
number format kept its own. Take the rule's code when it isn't General (in a
differential style General means "not set", as layer_under treats it).
Print also re-formatted every non-General cell from its own style through
display::cell_text; format with the look's code instead, through a new
display::value_text_as that value_text now calls (CSV/Text output unchanged).
Show Formulas keeps cell_text.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Crostini's cros-host-fonts mounts the host's fonts under
/usr/share/fonts/chromeos (noto/, notocjk/, crosextra/), which none of the
fixed Linux path lists reached: Thai, Hebrew, CJK and Symbols 2 fell back to
egui's Latin-only faces and drew tofu with the fonts installed, and the UI and
cell roles missed Noto Sans and Carlito. Add those folders to each list, with a
structural test that every list probes them.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
A hostile file could abort any process that opens it: a cell formula of a
million `%` (`1%%%…`) or a 200,000-term sum parsed into trees deep enough to
overflow the stack when printed, saved, evaluated or dropped, even in release
builds. Postfix operators (`%`, invoking a result) built their nesting in a
loop that the 256-level limit did not see.
- `parse` refuses formula text longer than Excel's 8,192 characters
(`MAX_FORMULA_LEN`, counted in characters, the leading `=` excluded). This
also bounds the depth of the left-deep trees long operator chains build.
- Each postfix `%` and each call of a result counts towards the nesting limit.
- A file's formula that is refused keeps its text and cached value, as other
unparsable formulas do.
Regression tests: formula (small-stack thread: long `%`, invoke and operator
chains are errors; the limit counts characters, not bytes) and xlsx
(`hostile_formula_text_does_not_overflow_the_stack`: open, save and drop a
workbook with such formulas and a defined name on a 1 MiB stack). Both abort
with a stack overflow without the fix.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Brings the branch up to upstream's main (180 more commits). One conflict,
and one thing the merge needed that was no conflict:
- docs/ui-parity.md: every line of both sides is kept, as upstream's own
merges keep them (its heading has three lines now); this change's
heading line and history row come first.
- crates/ui-egui/src/i18n/pt.rs: upstream's Portuguese catalog gained a
"Yesterday" of its own, with the same word ("Ontem"). The one this change
added is left out: a second arm for the same text is unreachable.
Gate: all eight steps, 1548 tests.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- restore closing braces the line-level merges of side-by-side tests dropped
- new ChartData literals carry the palette field
- the filter-menu shortcut passes the row with the column
- #688's tab tests account for #851's All Sheets button
- Serbian margins for the ruler-margin labels
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Lord-Taw