feat(options): menu bar, ribbon and HPASSOC switches; see-through command line by default

Options > Display gains Window Elements with "Show the menu bar"
(MENUBAR) and "Show the ribbon" (RIBBON / RIBBONCLOSE); Options > User
Preferences gains a Hatch switch for HPASSOC. The command line now
starts at 80 % opacity so the drawing shows through it.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/app/mod.rs

@@ -2616,6 +2616,12 @@ pub enum Message {
     /// Toggle reversing the mouse-wheel zoom direction (ZOOMWHEEL).
     ZoomWheelReversedChanged(bool),
     TouchpadPanChanged(bool),
+    /// Options: show the pull-down menus (MENUBAR).
+    MenuBarChanged(bool),
+    /// Options: show the ribbon (RIBBON / RIBBONCLOSE).
+    RibbonVisibleChanged(bool),
+    /// Options: new hatches are associative (HPASSOC).
+    HatchAssociativeChanged(bool),
     /// Interface scale in percent (Options > Display).
     UiScaleChanged(u16),
     /// Change how far one wheel notch zooms, from the Options slider

src/app/settings.rs

@@ -904,7 +904,7 @@ impl Default for UserSettings {
             language: crate::i18n::Language::default(),
             cliprompt_lines: 3,
             commandline_fade_ms: 3000,
-            command_line_opacity: 100,
+            command_line_opacity: 80,
             snap_spacing_x: 10.0,
             snap_spacing_y: 10.0,
             grid_spacing_x: 10.0,

src/app/update/mod.rs

@@ -9082,6 +9082,24 @@ impl OpenCADStudio {
                 Task::none()
             }
 
+            Message::MenuBarChanged(shown) => {
+                self.show_menu_bar = shown;
+                self.persist_settings_if_changed();
+                Task::none()
+            }
+
+            Message::RibbonVisibleChanged(shown) => {
+                self.ribbon_closed = !shown;
+                self.persist_settings_if_changed();
+                Task::none()
+            }
+
+            Message::HatchAssociativeChanged(associative) => {
+                self.hatch_associative = associative;
+                self.persist_settings_if_changed();
+                Task::none()
+            }
+
             Message::TouchpadPanChanged(enabled) => {
                 self.touchpad_pan = enabled;
                 self.persist_settings_if_changed();

src/app/view/modal.rs

@@ -300,6 +300,9 @@ impl OpenCADStudio {
                             cliprompt_lines: self.cliprompt_lines,
                             commandline_fade_ms: self.commandline_fade_ms,
                             command_line_opacity: self.command_line.opacity_percent(),
+                            show_menu_bar: self.show_menu_bar,
+                            show_ribbon: !self.ribbon_closed,
+                            hatch_associative: self.hatch_associative,
                             zoom_wheel_reversed: self.zoom_wheel_reversed,
                             touchpad_pan: self.touchpad_pan,
                             ui_scale_percent: self.ui_scale_percent,