i18n: Italian translates 1,802 more status and error messages

it is in COMPLETE_MESSAGES, but the untranslated report listed 1,842
status and error messages with no Italian row, so with the interface in
Italian those messages showed in English.

- it.tsv gains 1,802 `@msg` rows. The translations are VectorCraft's
  own, written from the English meaning with the catalog's terms, and
  await native review. Placeholders, backticked names, command ids,
  double-quoted values and bare true, false and null stay as the
  English writes them.
- The untranslated report now lists 40 Italian messages. 38 of those
  keys get Italian rows from open pull requests 7211, 7214 and 7116,
  so they are left out here. Menu strings, `tl!` literals, undo labels
  and swatch names are unchanged.
- The Italian row of docs/localization-parity.md gives the catalog's
  current counts, and docs/target-app-parity.md has a line for the
  change.

docs/localization-parity.md

@@ -50,7 +50,7 @@ plus review. Native-speaker review is human work and isn't in the hours.
 | Language | Code | Translated | Status |
 |---|---|---|---|
 | Traditional Chinese (Taiwan) | `zh-hant` | 4,892 rows, 790 of them `@msg` (counted 2026-10-21): menus, `tl!` literals and messages complete when counted (80% overall) | partial |
-| Italian | `it` | 4,011 / 4,020 | full |
+| Italian | `it` | 8,757 rows, 3,422 of them `@msg` and 48 `@msgplural` (counted 2026-11-13): the untranslated report lists 40 missing messages for it | full |
 | Dutch | `nl` | 7,299 rows, 1,609 of them `@msg` and 47 `@msgplural` (counted 2026-11-13 on `main` at `9a1a158a3`): in `COMPLETE_MESSAGES`, and the untranslated report lists the same missing messages for it as for German; one/other plurals | full |
 | Danish | `da` | 5,279 rows, 750 of them `@msg` (counted 2026-10-21): menus and `tl!` literals complete when counted; its messages are partial; one/other plurals | full |
 | Russian | `ru` | 4,009 / 4,020 | full |

docs/target-app-parity.md

@@ -870,6 +870,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
   - Hindi (2026-11-06): Hindi (`hi`): 7,877-row machine-assisted catalog, zero/one singular plurals, desktop font fallback and optional Devanagari craft-fonts fallback; all 55 translation tests pass; native review and a web font remain; scores and estimates unchanged. [Terminology and limitations](localization-hi.md).
   - Hindi wording (2026-11-13): rows outside the plug-in messages keep their English's meaning, quantities and clauses, and use the catalog's save, swatch, crop, resolution, path and type terms; a test checks those terms and the point unit in every row; native review remains; scores and estimates unchanged.
   - Hindi terms (2026-11-13): every row that names a variable (data merge, variable fonts and widths, environment variables) says वेरिएबल, and joining paths, anchor points, point type and lines says जोड़ें instead of शामिल हों, which stays for joining the community; a test checks both terms in every row; scores and estimates unchanged.
+  - Italian messages (2026-11-13): the Italian catalog (`it`) has 1,802 more status and error message rows, and the untranslated report's missing Italian messages go from 1,842 to 40; the translations are VectorCraft's own and await native review; scores and estimates unchanged. See [localization-parity.md](localization-parity.md).
   - Window › Help Bar shows or hides the tool-help strip at the bottom of the window apart from the status bar (`window.helpBar`). Each setting is kept with the UI preferences and in saved workspaces, and Presentation Mode hides both bars. Layouts saved before the setting existed show the Help Bar where they show the status bar (`help_bar_toggle_is_independent_and_saved_in_workspaces`, `help_bar_and_status_bar_render_independently`, `legacy_help_bar_visibility_follows_each_layouts_status_bar`, `a_help_bar_setting_the_file_lacks_is_saved`).
   - Czech render-site labels: desktop/web file filters, diagnostics, suggested preset names and contributor tooltips/plurals now use catalog lookups; gradients have Czech adjective agreement and printer marks have a separate context (PDF/Print and Summary). Search, Home, toolbar/panel tooltips and Preferences already look up their labels. Every complete catalog has rows for these labels and for the Roman and Japanese printer mark styles. Evidence: `i18n::tests::czech_render_site_follow_up`, `i18n::tests::complete_catalogs_translate_render_site_labels`, `dialogs::tests_modal::printer_mark_labels_are_distinct_from_language_names`; see [localization-parity.md](localization-parity.md).
   - The History panel, Edit › Undo and Edit › Redo translate the names of the steps that apply or redefine a character or paragraph style and of the step that redefines a graphic style: each such step keeps its template (`Apply {name}`, `Redefine {name}`, `Redefine Graphic Style “{name}”`) and the style's name, every complete catalog has a row for each template, and the panel and the menu show the style's name as the document holds it, except the Normal styles' names, which they show in the interface language (`steps_named_after_a_style_list_the_template_around_the_name`, `undo_and_redo_name_a_style_step_around_the_style_name`).