Merge pull request #1722 from ramox81/codex/view-background

# Conflicts:
#	locales/ar-SA/opencadstudio.ftl
#	locales/bg-BG/opencadstudio.ftl
#	locales/cs-CZ/opencadstudio.ftl
#	locales/de-DE/opencadstudio.ftl
#	locales/el-GR/opencadstudio.ftl
#	locales/en-US/opencadstudio.ftl
#	locales/es-ES/opencadstudio.ftl
#	locales/fi-FI/opencadstudio.ftl
#	locales/fr-FR/opencadstudio.ftl
#	locales/hi-IN/opencadstudio.ftl
#	locales/hu-HU/opencadstudio.ftl
#	locales/it-IT/opencadstudio.ftl
#	locales/ja-JP/opencadstudio.ftl
#	locales/ko-KR/opencadstudio.ftl
#	locales/lo-LA/opencadstudio.ftl
#	locales/nl-NL/opencadstudio.ftl
#	locales/pl-PL/opencadstudio.ftl
#	locales/pt-BR/opencadstudio.ftl
#	locales/ru-RU/opencadstudio.ftl
#	locales/tr-TR/opencadstudio.ftl
#	locales/zh-CN/opencadstudio.ftl
#	locales/zh-TW/opencadstudio.ftl

src/app/update/mod.rs

@@ -9315,6 +9315,13 @@ impl OpenCADStudio {
                     self.close_sheet_set_dialog();
                     return Task::none();
                 }
+                // The Background dialog returns to -VIEW's settings prompt.
+                if self.active_modal == Some(super::ModalKind::ViewBackground) {
+                    self.view_background = None;
+                    self.close_active_modal();
+                    let i = self.active_tab;
+                    return self.run_dash_view("SETTINGS", i);
+                }
                 if self.active_modal == Some(super::ModalKind::Field) {
                     self.close_field_dialog();
                     return Task::none();

src/app/update/style.rs

@@ -1162,6 +1162,18 @@ impl OpenCADStudio {
                     crate::ui::window::gradient_editor::GradientMsg::Color(index, color),
                 )))
             }
+            Some(crate::app::ColorPickTarget::ViewBackground(slot)) => {
+                let rgb = match color {
+                    codec::types::Color::Rgb { r, g, b } => Some([r, g, b]),
+                    codec::types::Color::Index(index) => {
+                        codec::types::aci_table::aci_to_rgb(index).map(|(r, g, b)| [r, g, b])
+                    }
+                    _ => None,
+                };
+                rgb.map(|rgb| {
+                    Message::PdfDialog(crate::ui::window::pdf_dialogs::PdfDialogMsg::BgColor(slot, rgb))
+                })
+            }
             Some(crate::app::ColorPickTarget::GraphicAttributesLine) => Some(
                 Message::GraphicAttributes(GraphicAttributesMsg::LineColor(color)),
             ),

src/app/update/viewport.rs

@@ -1090,6 +1090,28 @@ impl OpenCADStudio {
                 .push_output(crate::tf!("Viewport visual style: {label}").as_ref());
             return Task::none();
         }
+        self.apply_render_mode(i, mode, label);
+        // The viewport record carries the style the mode is saved as.
+        self.tabs[i]
+            .scene
+            .set_active_visual_style_named(crate::modules::view::visual_style::style_name_for(mode));
+        self.command_line
+            .push_output(crate::tf!("Visual style: {label}").as_ref());
+        // The point cloud move gizmo follows the visual style.
+        if i == self.active_tab {
+            self.refresh_selected_grips();
+        }
+        Task::none()
+    }
+
+    /// The model tab's visual style, without a message.
+    pub(crate) fn apply_render_mode(
+        &mut self,
+        i: usize,
+        mode: codec::entities::ViewportRenderMode,
+        label: &str,
+    ) {
+        use codec::entities::ViewportRenderMode as M;
         self.tabs[i].render_mode = mode;
         // Write the style onto the active Model tile alone so it
         // sticks when that tile loses focus and the other tiles keep
@@ -1105,13 +1127,6 @@ impl OpenCADStudio {
         // pipeline keys its upload cache off `geometry_epoch`.
         self.tabs[i].scene.bump_geometry_no_blocks();
         self.tabs[i].dirty = true;
-        self.command_line
-            .push_output(crate::tf!("Visual style: {label}").as_ref());
-        // The point cloud move gizmo follows the visual style.
-        if i == self.active_tab {
-            self.refresh_selected_grips();
-        }
-        Task::none()
     }
 
     pub(super) fn on_cursor_moved(