fix(dimension): repair QDIM workflows

src/app/mod.rs

@@ -467,6 +467,8 @@ pub(super) struct OpenCADStudio {
     pub texteditmode: bool,
     /// QDIM extension-origin priority: 0 = endpoints, 1 = intersections.
     pub quick_dimension_snap_priority: u8,
+    /// Creation-style policy used by continuing and baseline dimensions.
+    pub dimension_continue_mode: i16,
     /// When true (default), saving over an existing file first writes a `.bak`
     /// copy of it for recovery (#205). Toggle with the ISAVEBAK command.
     pub backup_on_save: bool,
@@ -3213,6 +3215,7 @@ impl OpenCADStudio {
             options_tab: crate::ui::window::options::OptionsTab::General,
             texteditmode: false,
             quick_dimension_snap_priority: 0,
+            dimension_continue_mode: 1,
             backup_on_save: true,
             file_assoc_enabled: true,
             savetime_min: 10,