feat(annotation): integrate object contexts

src/app/update/file.rs

@@ -516,6 +516,7 @@ impl OpenCADStudio {
                 section: self.start_section,
             },
             statusbar: self.statusbar_config.clone(),
+            annotation_auto_scale: self.annotation_auto_scale,
             ribbon: crate::app::config::RibbonConfig {
                 collapse: self.ribbon.collapse_mode(),
             },
@@ -545,6 +546,7 @@ impl OpenCADStudio {
         // (`refresh_recent_thumbs`) — never here on the boot path.
         self.start_section = cfg.start.section;
         self.statusbar_config = cfg.statusbar;
+        self.annotation_auto_scale = cfg.annotation_auto_scale.clamp(-4, 4);
         self.ribbon.set_collapse_mode(cfg.ribbon.collapse);
         self.plot_dialog = cfg.plot;
     }