feat(locale): add Fluent translations

Default to the platform language with persisted overrides across native and web builds.

Refs #630

src/app/view/modal.rs

@@ -5,41 +5,41 @@ use iced::{Background, Element, Fill, Fit, Theme};
 impl OpenCADStudio {
     /// Title shown in the active modal's title bar. Keep in sync with the
     /// [`Self::modal_content`] dispatch.
-    pub(super) fn modal_title(&self) -> &'static str {
+    pub(super) fn modal_title(&self) -> String {
         use super::super::ModalKind as K;
         match self.active_modal {
-            Some(K::About) => "About",
-            Some(K::Shortcuts) => "Keyboard Shortcuts",
-            Some(K::Aliases) => "Command Aliases",
-            Some(K::Options) => "Options",
-            Some(K::FindReplace) => "Find and Replace",
-            Some(K::PluginManager) => "Plugin Manager",
-            Some(K::UpdateNotice) => "Update Available",
-            Some(K::Layers) => "Layer Manager",
-            Some(K::LayerStateManager) => "Layer State Manager",
-            Some(K::LayerStateEditor) => "Edit Layer State",
-            Some(K::Plot) => "Plot",
-            Some(K::LayoutManager) => "Layout Manager",
-            Some(K::ScaleManager) => "Scale Manager",
-            Some(K::AnnoObjectScale) => "Annotation Object Scale",
-            Some(K::Plotstyle) => "Plot Style Editor",
-            Some(K::TextStyle) => "Text Style Manager",
-            Some(K::MlStyle) => "Multiline Style Manager",
-            Some(K::TableStyle) => "Table Style Manager",
-            Some(K::MLeaderStyle) => "Multileader Style Manager",
-            Some(K::DimStyle) => "Dimension Style Manager",
-            Some(K::AssocPrompt) => "Default Application",
-            Some(K::AecDropWarning) => "Save Warning",
+            Some(K::About) => crate::tr!("modal-about"),
+            Some(K::Shortcuts) => crate::tr!("modal-keyboard-shortcuts"),
+            Some(K::Aliases) => crate::tr!("modal-command-aliases"),
+            Some(K::Options) => crate::tr!("action-options"),
+            Some(K::FindReplace) => crate::tr!("modal-find-replace"),
+            Some(K::PluginManager) => crate::tr!("modal-plugin-manager"),
+            Some(K::UpdateNotice) => crate::tr!("modal-update-available"),
+            Some(K::Layers) => crate::tr!("modal-layer-manager"),
+            Some(K::LayerStateManager) => crate::tr!("modal-layer-state-manager"),
+            Some(K::LayerStateEditor) => crate::tr!("modal-edit-layer-state"),
+            Some(K::Plot) => crate::tr!("modal-plot"),
+            Some(K::LayoutManager) => crate::tr!("modal-layout-manager"),
+            Some(K::ScaleManager) => crate::tr!("modal-scale-manager"),
+            Some(K::AnnoObjectScale) => crate::tr!("modal-annotation-object-scale"),
+            Some(K::Plotstyle) => crate::tr!("modal-plot-style-editor"),
+            Some(K::TextStyle) => crate::tr!("modal-text-style-manager"),
+            Some(K::MlStyle) => crate::tr!("modal-multiline-style-manager"),
+            Some(K::TableStyle) => crate::tr!("modal-table-style-manager"),
+            Some(K::MLeaderStyle) => crate::tr!("modal-multileader-style-manager"),
+            Some(K::DimStyle) => crate::tr!("modal-dimension-style-manager"),
+            Some(K::AssocPrompt) => crate::tr!("modal-default-application"),
+            Some(K::AecDropWarning) => crate::tr!("modal-save-warning"),
             #[cfg(not(target_arch = "wasm32"))]
-            Some(K::FileInUse) => "Unable to Save Drawing",
+            Some(K::FileInUse) => crate::tr!("modal-unable-save"),
             #[cfg(not(target_arch = "wasm32"))]
-            Some(K::ExternalChange) => "Drawing Changed on Disk",
-            Some(K::LayerDeleteWarning) => "Delete Layer",
-            Some(K::Unsaved) => "Unsaved Changes",
-            Some(K::PointStyle) => "Point Style",
-            Some(K::AttributeEditor) => "Attribute Editor",
-            Some(K::SaveDialog) => "Save Drawing As",
-            None => "",
+            Some(K::ExternalChange) => crate::tr!("modal-drawing-changed"),
+            Some(K::LayerDeleteWarning) => crate::tr!("modal-delete-layer"),
+            Some(K::Unsaved) => crate::tr!("modal-unsaved-changes"),
+            Some(K::PointStyle) => crate::tr!("modal-point-style"),
+            Some(K::AttributeEditor) => crate::tr!("modal-attribute-editor"),
+            Some(K::SaveDialog) => crate::tr!("modal-save-drawing-as"),
+            None => String::new(),
         }
     }
 
@@ -90,6 +90,7 @@ impl OpenCADStudio {
                         &self.default_save_format,
                         &self.ui_theme,
                         &self.theme_color_inputs,
+                        self.language,
                         flow,
                     )
                 },