feat(config): persist general edge-stack dock layout

src/app/config.rs

@@ -29,6 +29,10 @@ pub struct AppConfig {
     pub statusbar: StatusBarConfig,
     /// Dock position, width and auto-collapse behavior of the Properties panel.
     pub properties: PropertiesDockConfig,
+    /// General edge-stack dock layout (which panels are docked, side, order,
+    /// width and auto-collapse). Newer dock state; the Properties dock is
+    /// folded into this when its panel is migrated.
+    pub dock: crate::ui::dock::DockState,
     /// Add a newly selected annotation scale to existing annotative objects.
     pub annotation_auto_scale: i8,
     /// Ribbon collapse density.
@@ -49,6 +53,7 @@ impl Default for AppConfig {
             start: StartConfig::default(),
             statusbar: StatusBarConfig::default(),
             properties: PropertiesDockConfig::default(),
+            dock: crate::ui::dock::DockState::default(),
             annotation_auto_scale: -4,
             ribbon: RibbonConfig::default(),
             plot: PlotDialogState::default(),

src/app/mod.rs

@@ -591,6 +591,8 @@ pub(super) struct OpenCADStudio {
     show_properties: bool,
     /// Docked Insert Block panel visibility.
     pub(crate) show_block_palette: bool,
+    /// General edge-stack dock layout for the side panels.
+    pub(crate) dock: crate::ui::dock::DockState,
     /// Docked Insert Block panel state (search, preview size, cached thumbnails).
     pub(crate) block_palette: crate::ui::window::block_palette::BlockPalette,
     /// Whether the narrow-window block-palette bar is expanded.
@@ -3159,6 +3161,7 @@ impl OpenCADStudio {
             show_block_palette: false,
             block_palette: Default::default(),
             block_palette_expanded: false,
+            dock: Default::default(),
             show_file_tabs: true,
             show_layout_tabs: true,
             last_point: None,

src/app/update/file.rs

@@ -558,6 +558,11 @@ impl OpenCADStudio {
                 width: self.properties_width,
                 auto_collapse: self.properties_auto_collapse,
             },
+            dock: {
+                let mut dock = self.dock.clone();
+                dock.ensure_settings();
+                dock
+            },
             annotation_auto_scale: self.annotation_auto_scale,
             ribbon: crate::app::config::RibbonConfig {
                 collapse: self.ribbon.collapse_mode(),
@@ -602,6 +607,9 @@ impl OpenCADStudio {
             250.0
         };
         self.properties_auto_collapse = cfg.properties.auto_collapse;
+        let mut dock = cfg.dock;
+        dock.ensure_settings();
+        self.dock = dock;
         self.annotation_auto_scale = cfg.annotation_auto_scale.clamp(-4, 4);
         self.ribbon.set_collapse_mode(cfg.ribbon.collapse);
         self.plot_dialog = cfg.plot;