i18n(gu): singular for zero, and install Gujarati craft-fonts faces

Gujarati takes the singular form for 0 and 1, as Hindi does, so gu now
uses plural_french. add_craft_fonts installs Gujr faces into the UI
families the way it installs Deva faces, so a bundled Gujarati face is
used and bundled_fonts_cover_the_catalogs holds when one is added.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/ui-egui/src/i18n.rs

@@ -116,7 +116,7 @@ pub static LANGUAGES: [LangInfo; 29] = [
         code: "gu",
         name: "ગુજરાતી",
         source: include_str!("i18n/gu.tsv"),
-        plural: plural_one_other,
+        plural: plural_french,
         complete_menus: true,
         catalog: OnceLock::new(),
     },

crates/ui-egui/src/i18n/tests.rs

@@ -4,13 +4,13 @@ use super::*;
 const ZH: fn() -> Lang = || Lang::from_code("zh-hant").expect("zh-hant registered");
 
 #[test]
-fn gujarati_resolves_locales_and_uses_one_other_plurals() {
+fn gujarati_resolves_locales_and_takes_the_singular_for_zero_and_one() {
     let gu = Lang::from_code("gu").expect("gu registered");
     for tag in ["gu", "gu-IN", "gu_IN.UTF-8", "GU-in", "gu-Gujr-IN"] {
         assert_eq!(lang_from_tag(tag), Some(gu), "{tag}");
     }
     assert_eq!(gu.name(), "ગુજરાતી");
-    assert_eq!([0, 1, 2, 21].map(gu.0.plural), [1, 0, 1, 1]);
+    assert_eq!([0, 1, 2, 21].map(gu.0.plural), [0, 0, 1, 1]);
     assert_eq!(tr(gu, "Save"), "સાચવો");
 }
 

crates/ui-egui/src/theme.rs

@@ -571,7 +571,10 @@ pub(crate) fn craft_font_name(f: &vectorcraft_text::CraftFont) -> String {
 fn add_craft_fonts(fonts: &mut FontDefinitions) {
     // The name of each face's copy in each family.
     let mut copies: std::collections::HashMap<(FontFamily, String), String> = std::collections::HashMap::new();
-    for f in vectorcraft_text::CRAFT_FONTS.iter().filter(|f| f.is_japanese() || f.is_georgian() || f.scripts.contains(&"Deva")) {
+    for f in vectorcraft_text::CRAFT_FONTS
+        .iter()
+        .filter(|f| f.is_japanese() || f.is_georgian() || f.scripts.contains(&"Deva") || f.scripts.contains(&"Gujr"))
+    {
         let name = craft_font_name(f);
         for (copy, data, families) in crate::ui_fonts::baseline_copies(fonts, &name, &FontData::from_static(f.bytes)) {
             for family in families {
@@ -589,6 +592,7 @@ fn add_craft_fonts(fonts: &mut FontDefinitions) {
         stack.extend(vectorcraft_text::craft_fonts::japanese_ui_fonts(bold).into_iter().map(copy));
         stack.extend(vectorcraft_text::craft_fonts::georgian_ui_fonts().into_iter().map(copy));
         stack.extend(vectorcraft_text::CRAFT_FONTS.iter().filter(|f| f.scripts.contains(&"Deva")).map(copy));
+        stack.extend(vectorcraft_text::CRAFT_FONTS.iter().filter(|f| f.scripts.contains(&"Gujr")).map(copy));
     }
 }