French (fr) UI localization (#1224)

Adds a French catalog as a partial locale (missing strings fall back to English, like Russian), registered in the language list, with tests and attribution.

crates/ui-egui/src/i18n.rs

@@ -34,10 +34,11 @@ impl Catalog {
 static ENGLISH: Catalog = Catalog::new("en", "English", include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/../../assets/locales/en.json")));
 static JAPANESE: Catalog = Catalog::new("ja", "日本語", include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/../../assets/locales/ja.json")));
 static GERMAN: Catalog = Catalog::new("de", "Deutsch", include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/../../assets/locales/de.json")));
+static FRENCH: Catalog = Catalog::new("fr", "Français", include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/../../assets/locales/fr.json")));
 static KOREAN: Catalog = Catalog::new("ko", "한국어", include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/../../assets/locales/ko.json")));
 static RUSSIAN: Catalog = Catalog::new("ru", "Русский", include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/../../assets/locales/ru.json")));
 static CHINESE: Catalog = Catalog::new("zh", "中文", include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/../../assets/locales/zh.json")));
-pub const LOCALES: &[&Catalog] = &[&ENGLISH, &JAPANESE, &GERMAN, &KOREAN, &RUSSIAN, &CHINESE];
+pub const LOCALES: &[&Catalog] = &[&ENGLISH, &JAPANESE, &GERMAN, &FRENCH, &KOREAN, &RUSSIAN, &CHINESE];
 
 pub fn is_supported(id: &str) -> bool {
     LOCALES.iter().any(|catalog| catalog.id == id)
@@ -188,9 +189,9 @@ mod tests {
     }
 
     /// Catalogs delivered complete. English is the source catalog; Japanese was completed
-    /// upstream and Chinese lands complete here. German, Korean and Russian are partial
-    /// (German and Korean predate the coverage guards; Russian is kept partial so a new label
-    /// doesn't need a sixth translation), so their gaps fall back to English and are reported by
+    /// upstream and Chinese lands complete here. German, Korean, Russian and French are partial
+    /// (German and Korean predate the coverage guards; Russian and French are kept partial so a
+    /// new label doesn't need more translations), so their gaps fall back to English and are reported by
     /// `cargo xtask i18n` without failing the build, while nothing in the complete catalogs may
     /// regress.
     const COMPLETE: &[&str] = &["ja", "zh"];
@@ -260,6 +261,7 @@ mod tests {
             ("de", "Flansch", "Zebra-Analyse", "Bewegungsuntersuchung"),
             ("ko", "플랜지", "얼룩말줄무늬 분석", "운동 연구"),
             ("ru", "Фланец", "Зебра-анализ", "Исследование движения"),
+            ("fr", "Bord tombé", "Analyse zébrée", "Étude de mouvement"),
         ];
         for (lang, flange, zebra, motion) in cases {
             let locale = Locale::for_language(lang);
@@ -335,9 +337,13 @@ mod tests {
     /// non-empty string" would not catch that.
     #[test]
     fn id_labels_resolve_to_their_own_translation_not_an_english_fallback() {
-        for (lang, profile, points) in
-            [("de", "Profil", "Punkte"), ("ja", "プロファイル", "点"), ("ko", "프로파일", "점"), ("ru", "Профиль", "Точки")]
-        {
+        for (lang, profile, points) in [
+            ("de", "Profil", "Punkte"),
+            ("ja", "プロファイル", "点"),
+            ("ko", "프로파일", "점"),
+            ("ru", "Профиль", "Точки"),
+            ("fr", "Profil", "Points"),
+        ] {
             let locale = Locale::for_language(lang);
             assert_eq!(locale.label("ui.palette_profile"), profile, "{lang}");
             assert_eq!(locale.label("ui.palette_points"), points, "{lang}");
@@ -355,7 +361,13 @@ mod tests {
     /// the row's two-word text must reach its own entry rather than that one.
     #[test]
     fn the_construction_geometries_row_reaches_its_own_entry_not_the_line_type() {
-        let rows = [("de", "Konstruktionsgeometrien"), ("ja", "構築ジオメトリ"), ("ko", "구성 형상"), ("ru", "Вспомогательная геометрия")];
+        let rows = [
+            ("de", "Konstruktionsgeometrien"),
+            ("ja", "構築ジオメトリ"),
+            ("ko", "구성 형상"),
+            ("ru", "Вспомогательная геометрия"),
+            ("fr", "Géométries de construction"),
+        ];
         for (lang, want) in rows {
             let locale = Locale::for_language(lang);
             assert_eq!(locale.label("Construction Geometries"), want, "{lang}");
@@ -428,6 +440,29 @@ mod tests {
         assert_eq!(ru.dynamic("Sketch of bracket"), "Sketch of bracket");
     }
 
+    #[test]
+    fn french_catalog_translates_keys_labels_and_browser_patterns() {
+        let fr = Locale::for_language("fr");
+        assert_eq!(fr.name(), "Français");
+        assert!(is_supported("fr"));
+        assert_eq!(fr.text("ui.preferences"), "Préférences");
+        assert_eq!(fr.label("Extrude"), "Extrusion");
+        assert_eq!(fr.label("Fillet"), "Congé");
+        assert_eq!(fr.label("CREATE SKETCH"), "CRÉER UNE ESQUISSE");
+        assert_eq!(fr.label("NonExistentKey"), "NonExistentKey");
+        // French puts a no-break space before the two-part punctuation marks.
+        assert_eq!(fr.format("document.save_changes", &[("name", "My {design}")]), "Enregistrer les modifications de My {design}\u{a0}?");
+        assert_eq!(fr.format("dialog.selected_count", &[("count", "2")]), "↖ 2 sélectionné(s)");
+        assert_eq!(fr.dynamic("Sketch1"), "Esquisse1");
+        assert_eq!(fr.dynamic("Body2"), "Corps2");
+        assert_eq!(fr.dynamic("Component12"), "Composant12");
+        assert_eq!(fr.dynamic("Units: mm"), "Unités\u{a0}: mm");
+        assert_eq!(fr.dynamic("Precision: 3"), "Précision\u{a0}: 3");
+        assert_eq!(fr.dynamic("Parameters (5)"), "Paramètres (5)");
+        assert_eq!(fr.dynamic("4 degrees of freedom"), "4 degrés de liberté");
+        assert_eq!(fr.dynamic("Sketch of bracket"), "Sketch of bracket");
+    }
+
     #[test]
     fn render_scopes_restore_the_previous_language() {
         let _english = scope("en");

crates/ui-egui/src/i18n_ui_tests.rs

@@ -65,6 +65,7 @@ fn window_chrome_renders_in_the_active_language() {
         ("de", "BROWSER", "Auswahlfilter", "Flächen"),
         ("ko", "브라우저", "선택 필터", "면"),
         ("ru", "БРАУЗЕР", "Фильтр выделения", "Грани"),
+        ("fr", "NAVIGATEUR", "Filtre de sélection", "Faces"),
     ] {
         let mut h = Harness::new();
         h.app.preferences.language = lang.into();

crates/ui-egui/src/prefs.rs

@@ -1584,7 +1584,7 @@ mod tests {
         assert!(control(&mut app, &json!({"open": "Plugins"})).is_err());
         assert!(set(&mut app, &json!({"up_axis": "x"})).is_err());
         assert!(set(&mut app, &json!({"theme": "sepia"})).is_err());
-        assert!(set(&mut app, &json!({"language": "fr"})).is_err());
+        assert!(set(&mut app, &json!({"language": "xx"})).is_err());
     }
 
     #[test]