i18n: Traditional Chinese has a row for the messages the untranslated report lists

The Traditional Chinese catalog had no row for 1,852 of the status and
error messages that i18n::tests::untranslated_report finds in the
sources, so the status bar showed them in English.

- zh-hant.tsv gets 1,813 @msg rows under one comment line at the end of
  the file, written in Taiwan usage with the catalog's existing terms.
  Each row keeps the English key, its placeholders, doubled braces,
  parameter names, command ids and quoted values unchanged.
- The 38 rows that open #7211, #7116 and #7330 add, and the row #7214
  added, are left out, so the catalogs stay consistent.
- docs/localization-parity.md and docs/target-app-parity.md give the new
  counts: 3,438 @msg and 48 @msgplural rows, 40 messages still listed.

The rows for `{name} must be {lo}–{hi}{unit} (got {v})` and
`unknown parameter `{within}{key}`; {why}` are counted by the report, but
Template::parse does not load a template with two placeholders in a row,
so those two messages still show in English. The row for
`{k} has control characters{_1}` does not match the message for a
multi-line File Info field, where its last placeholder is empty.

docs/localization-parity.md

@@ -49,7 +49,7 @@ 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 |
+| Traditional Chinese (Taiwan) | `zh-hant` | 8,820 rows, 3,438 of them `@msg` and 48 `@msgplural` (counted 2026-11-13): the untranslated report lists 40 missing messages for it; menus, `tl!` literals and messages were complete when counted on 2026-10-21 (80% overall) | partial |
 | Italian | `it` | 4,011 / 4,020 | 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 |

docs/target-app-parity.md

@@ -885,6 +885,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
   - The status bar translates the limits a plug-in run can exceed (its instruction, time and memory budgets and its output size) and the error of a plug-in removal that leaves the plug-in's grant in the plug-in store, in every language that translates every message. The untranslated-strings report also lists messages that an error or a status takes from a `&str` constant (`plugin_limit_errors_are_translated`, `message_scan_reads_messages_held_in_constants`).
   - The status bar translates the plug-in host's other errors (manifest, module and run checks, the output an importer, exporter or effect returns, and the approval a plug-in's permissions need) in every language that translates every message. A JSON object or array inside a message stays as written, and a message that wraps another one, such as `plug-in manifest: {0}`, is matched by its own row before a row that starts with a placeholder. The reasons inside these errors (what is wrong with a parameter's spec or dialog keys, the value a parameter needs, what is wrong with an object, stroke, paint or effect in a plug-in's output) are translated with them, and the untranslated-strings report lists the reasons the plug-in host's error helpers take (`plugin_messages_are_translated_in_every_complete_catalog`, `plugin_errors_translate_with_their_values`, `plugin_error_reasons_are_translated_with_the_error`, `message_scan_reads_plugin_helpers`, `templates_that_start_with_text_match_first`).
   - The status bar translates the errors a script's `File` and `Folder` objects, `vc.run`, `$.evalFile`, the `$` object's properties and functions, `alert`, `confirm` and `prompt`, `vc.document` and `vc.log` raise, the limits a run can pass, and the errors of Drop Script Engine, and the line for a run that fails (a syntax error, a thrown error, a limit, a stop or an internal error, with the script's name, the line and column, the included file it is in and the files left written), in every language that translates every message. The script's name, paths, numbers, command ids and the text a script throws itself are shown as they are. A failure with no line and column, such as an error in code `eval` compiled, is shown with one colon after the script's name (`an_error_without_a_place_names_the_script_and_kind`). A message template that names a value twice matches only when both places hold the same text, so the line for a failed run is not taken for the message inside it (`a_repeated_placeholder_matches_the_same_text`). The untranslated-strings report also lists the messages the script host's `fail`, `value` and `over` helpers take and the errors the script interpreter throws, and a constant's text comes from the file or crate that declares it, so the Scripts menu's headers are not listed as messages (`script_errors_are_translated`, `script_host_errors_are_translated`, `message_scan_reads_script_interpreter_errors`, `message_scan_reads_constants_of_the_file_and_its_crate`, `message_scan_skips_test_modules_with_any_test_cfg`).
+  - The Traditional Chinese catalog (`crates/ui-egui/src/i18n/zh-hant.tsv`) has an `@msg` row for the status and error messages the untranslated report (`untranslated_report`) finds in the sources, 3,438 `@msg` rows in all: the errors of commands, scripts, file import and export and plug-ins. The report lists 40 Traditional Chinese messages: open #7211, #7116 and #7330 add the rows for 38 of them, and the other 2 have no row in any catalog. A message with two placeholders in a row (`Template::parse` in `crates/ui-egui/src/i18n/catalog.rs`) is still shown in English.
   - Localised UI: menus (in-window and native), panels, dialogs, toolbar and Preferences read from per-language catalogs (`crates/ui-egui/src/i18n`, see `docs/development.md`); Traditional Chinese (Taiwan), Simplified Chinese (mainland), Japanese, Korean, Vietnamese, German, Spanish, French, Italian, Polish, Brazilian Portuguese, Russian, Ukrainian, Georgian and Catalan ship complete, and Czech covers every menu label (and more), with system-locale detection on macOS, Windows, Linux and the web (the browser's languages, or `?lang=`), a Language preference and, on macOS, a VectorCraft ▸ Language menu. Names are never translated (fonts and their styles, layers, artboards, saved presets, user libraries, custom workspaces, recent files, plug-ins).
     The counts that Package's status and question, the folder search of Missing Fonts and Find Linked Files, the modified and missing linked file prompts and the CSS Properties panel's notes show use the interface language's plural forms instead of a fixed "(s)" form. Evidence: `the_missing_links_note_uses_each_count_form` in `crates/ui-egui/src/dialogs/tests_package.rs`, `the_modified_links_question_uses_each_count_form` in `crates/ui-egui/src/dialogs/missing_links.rs`, `search_counts_use_each_count_form` in `crates/ui-egui/src/dialogs/missing_fonts/tests.rs` and `the_unnamed_objects_note_uses_each_count_form` in `crates/ui-egui/src/panels/tests_css_properties.rs`.
     The status bar's messages for relinked, replaced, updated and embedded images, broken links, linked files that can't be read or changed on disk, images that can't be decoded, added and unavailable fonts, copied CSS, downloads and exports with their notes name one item in the singular and more in the plural, in English and in each language's plural forms (`counted_status_messages_take_the_plural_form` in `crates/ui-egui/src/i18n/tests.rs`).