Turkish interface (Türkçe) (#1529)

Add a Turkish catalog (tr.tsv, 1,330 rows): the union of the existing
catalogs, four menu headings (Ölçülendirme for the Dimension menu, Ölçü for
the object) and single-form counts, since a Turkish noun stays singular after
a number. No marked UI literal falls back to English. Prompts read "… girin"
for Enter and "… belirtin" for Specify; clickable keywords (Top, Zero, Bottom,
_tan to, nX/nXP) keep the spelling the engine accepts.

Register the language (Preference::Turkish, `tr`, Türkçe) and add locale,
preference, count, menu-heading, live-switch, dialog and font tests. Docs,
README and ATTRIBUTION list it; the translation is AI-assisted, the running
app was reviewed by a native speaker, and line-by-line proofreading is still
to do.

Co-authored-by: Brandon Thomas <echelon@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

docs/localization-parity.md

@@ -69,8 +69,9 @@ plus native review by a human; extending the catalog to the remaining English-on
 | Swedish | sv | 1,330 catalog rows; reference catalog, marked UI literals and menu headings covered (no gaps reported) | dialogs and tooltips yes; contextual menu headings; command reference searchable in Swedish | Latin: yes (bundled egui proportional and monospace fonts; å ä ö é and Swedish quotes tested) | AI-assisted (Claude Code) by @holmbom; terminology and the running app reviewed by a native speaker | complete current catalog; English-only interface gaps remain | line-by-line proofreading + shared English-only UI work |
 | Italian | it | 1,227 catalog rows; reference catalog and marked UI literals covered | dialogs and tooltips yes; contextual menu headings (Visualizza / Vista, Edita / Modifica); command reference searchable in Italian | Latin: yes (bundled egui fonts; accented letters tested) | AI-assisted by Emanuele Bottelli (Claude), written from the English strings with Italian desktop-CAD vocabulary; no native proofreading pass yet | complete current catalog; English-only interface gaps remain | native review + shared English-only UI work |
 | Hungarian | hu | 1,326 catalog rows; reference catalog, marked UI literals and menu headings covered (no gaps reported) | dialogs and tooltips yes; contextual menu headings; command reference searchable in Hungarian | Latin: yes (bundled egui proportional and monospace fonts; ő ű Ő Ű and the other accented letters tested) | translated by @Skaywalker from the English strings; independent native proofreading pending | complete current catalog; English-only interface gaps remain | native proofreading + shared English-only UI work |
+| Turkish | tr | 1,330 catalog rows; reference catalog, marked UI literals and menu headings covered (no gaps reported) | dialogs and tooltips yes; contextual menu headings (Ölçülendirme / Ölçü); command reference searchable in Turkish | Latin: yes (bundled egui proportional and monospace fonts; Ç Ğ İ Ö Ş Ü ç ğ ı ö ş ü tested) | AI-assisted by @ogzhnklvz, written from the English strings with Turkish desktop-CAD vocabulary; the running app reviewed by a native speaker | complete current catalog; English-only interface gaps remain | line-by-line proofreading + shared English-only UI work |
 
-Other languages shipped: Ukrainian, Brazilian Portuguese, German, Czech, Russian, French, Italian, Korean, Swedish and Hungarian.
+Other languages shipped: Ukrainian, Brazilian Portuguese, German, Czech, Russian, French, Italian, Korean, Swedish, Hungarian and Turkish.
 Czech, Swedish, Hungarian and Brazilian Portuguese cover the reference catalog and every marked UI literal; engine diagnostics and uncatalogued text
 remain English. AutoCAD for Mac ships 7
 non-English languages (zh-Hans, es, fr, ja, de, ko, it); of those, CADCraft now ships German and Korean,
@@ -85,6 +86,7 @@ each language, which needs humans. Translations parallelise fully once the catal
 | Date | Change | Summary |
 |---|---|---|
 | 2026-10-14 | minor | Swedish completed: 95 rows for strings added since (Hatch and Gradient dialog, Block Editor, REFEDIT, multileader editing, Options selection settings, MTEXT editor, recent files); 1,330 rows, every key of the Ukrainian reference catalog |
+| 2026-10-18 | minor | Turkish added: 1,330 rows (the existing catalog union), single count form, four menu headings, prompt keywords kept in English; locale/preferences/menu/live-switch/dialog/font tests; no gaps in the marked UI literals; AI-assisted, the running app reviewed by a native speaker |
 | 2026-10-13 | minor | Hungarian added: 1,326 rows, a single count form, menu headings, locale/preferences/menu/font/render tests; no gaps in the marked UI literals; native proofreading pending |
 | 2026-10-13 | minor | Swedish added: 1,235 rows, one/other plurals, menu headings, locale/preferences/menu/font/render tests; no gaps in the marked UI literals; terminology and the running app reviewed by a native speaker |
 | 2026-10-13 | minor | Korean added: full 1,235-row existing catalog union, single count form, locale/persistence/live-switch tests, and validated Hangul UI fonts; native review and platform verification pending |

docs/localization.md

@@ -1,7 +1,7 @@
 # Interface languages
 
 Choose **Edit → Interface Language** and select **Auto (system language)**, **English**,
-**Українська**, **Português (Brasil)**, **Deutsch**, **Español**, **Čeština** (Czech), **Русский**, **Français**, **简体中文**, **Italiano**, **한국어** (Korean), **Svenska** (Swedish), **العربية** (Arabic), or **Magyar** (Hungarian).
+**Українська**, **Português (Brasil)**, **Deutsch**, **Español**, **Čeština** (Czech), **Русский**, **Français**, **简体中文**, **Italiano**, **한국어** (Korean), **Svenska** (Swedish), **العربية** (Arabic), **Magyar** (Hungarian), or **Türkçe** (Turkish).
 The interface updates without restarting, including the native macOS menus.
 The choice is saved with the other interface preferences (`cadcraft.prefs`, beside the theme):
 eframe storage on the desktop, browser local storage on the web. Installations without a saved
@@ -11,7 +11,7 @@ Auto uses the first supported language in the operating system's preferred local
 browser's `navigator.languages` on the web. BCP 47 and POSIX tags select their primary language:
 `uk-UA` → `uk`, `de_AT.UTF-8` → `de`, `es-MX` → `es`, `pt_BR.UTF-8` → `pt-BR`,
 `cs-CZ` and `cs_CZ.UTF-8` → `cs`, `it-IT` and `it_CH.UTF-8` → `it`, `ko-KR` and `ko_KR.UTF-8` → `ko`,
-`sv-SE`, `sv-FI` and `sv_SE.UTF-8` → `sv`, `hu-HU` and `hu_HU.UTF-8` → `hu`. Unsupported languages fall back to English.
+`sv-SE`, `sv-FI` and `sv_SE.UTF-8` → `sv`, `hu-HU` and `hu_HU.UTF-8` → `hu`, `tr-TR` and `tr_TR.UTF-8` → `tr`. Unsupported languages fall back to English.
 Set `CADCRAFT_LOCALE=cs-CZ` to override the desktop's locale for a launch.
 An explicit saved language choice takes precedence over that override.
 
@@ -22,7 +22,7 @@ Automation can select the language through the existing control channel:
 ```
 
 The `ui.set` method also accepts `{"interfaceLanguage":"cs"}`. Supported values are `auto`,
-`en`, `uk`, `pt-BR`, `de`, `es`, `cs`, `ru`, `fr`, `zh`, `it`, `ko`, `sv`, `ar`, and `hu`; invalid values are rejected without changing the current
+`en`, `uk`, `pt-BR`, `de`, `es`, `cs`, `ru`, `fr`, `zh`, `it`, `ko`, `sv`, `ar`, `hu`, and `tr`; invalid values are rejected without changing the current
 selection. Resetting palettes keeps the language choice.
 
 ## Translation coverage
@@ -61,6 +61,17 @@ a count takes one form because a Hungarian numeral is followed by the singular.
 was written from the meaning of CADCraft's English strings; no other product's localization was
 used as a source. It has not yet been proofread by an independent native speaker.
 
+Turkish has **1,330 rows**: the union of the existing catalogs, four contextual menu headings
+(**Ölçülendirme** for the Dimension menu, **Ölçü** for the object) and two single-form count
+templates, since a Turkish noun stays singular after a number ("3 commit"). No marked UI literal
+falls back to English. Prompts read "… girin" for Enter and "… belirtin" for Specify, and clickable
+keywords (`Top`, `Zero`, `Bottom`, `_tan to`, `nX`/`nXP`) keep the spelling the engine accepts.
+The translation is original, AI-assisted work by @ogzhnklvz, written from the English strings with
+Turkish desktop-CAD vocabulary (Katman, Tarama, Yuvarlatma, Pah, Öteleme, Nesne Kenetleme,
+Görünüm Penceresi); the running app was reviewed by a native speaker, and line-by-line
+proofreading is still to do. The bundled
+egui fonts cover `Ç Ğ İ Ö Ş Ü ç ğ ı ö ş ü`.
+
 Drawing titles, layer/layout/block/style names, parameter names and expressions, text in a
 drawing, and command-line input are user data and retain their original spelling. Clickable
 command keywords retain their English spelling so the text shown matches the input accepted