fix(dist): respect units settings in DIST measurement output

src/app/commands/inquiry.rs

@@ -2403,4 +2403,39 @@ mod find_replace_command_tests {
             let _ = app.dispatch_inquiry(cmd, i);
         }
     }
+
+    #[test]
+    fn dist_command_respects_drawing_units_precision() {
+        let mut app = OpenCADStudio::new_for_test();
+        let i = app.active_tab;
+        // Simulate changing linear precision to 0 via UNITS dialog apply
+        app.drawing_units = Some(crate::ui::window::drawing_units::State {
+            linear_format: 2,
+            linear_precision: 0,
+            angular_format: 0,
+            angular_precision: 0,
+            clockwise: false,
+            base_angle: "0".into(),
+            insertion_units: 4,
+        });
+        let _ = app.update(Message::DrawingUnitsApply);
+
+        // Run DIST command
+        let _ = app.dispatch_inquiry("DIST", i);
+        assert!(app.tabs[i].active_cmd.is_some());
+
+        // First point
+        let _ = app.tabs[i].active_cmd.as_mut().unwrap().on_point(glam::DVec3::new(0.0, 0.0, 0.0));
+        // Second point
+        let res = app.tabs[i].active_cmd.as_mut().unwrap().on_point(glam::DVec3::new(10.0, 0.0, 0.0));
+        match res {
+            crate::command::CmdResult::Measurement(msg) => {
+                assert!(msg.contains("Distance = 10"), "Expected 'Distance = 10', got: {msg}");
+                assert!(msg.contains("Delta X = 10"), "Expected 'Delta X = 10', got: {msg}");
+                assert!(msg.contains("Delta Y = 0"), "Expected 'Delta Y = 0', got: {msg}");
+                assert!(msg.contains("Delta Z = 0"), "Expected 'Delta Z = 0', got: {msg}");
+            }
+            _ => panic!("Expected CmdResult::Measurement"),
+        }
+    }
 }

src/app/commands/styleprops.rs

@@ -2505,6 +2505,13 @@ impl OpenCADStudio {
                     if name == "PDMODE" || name == "PDSIZE" {
                         self.tabs[i].scene.invalidate_point_dependencies();
                     }
+                    if matches!(name.as_str(), "LUNITS" | "LUPREC" | "AUNITS" | "AUPREC") {
+                        crate::entities::common::set_unit_context(
+                            crate::entities::common::UnitContext::from_header(
+                                &self.tabs[i].scene.document.header,
+                            ),
+                        );
+                    }
                     // ORTHOMODE / OSMODE set the header directly; mirror them into
                     // the live Ortho / running OSNAP so the constraint + status
                     // bar follow and the save-time stamp doesn't revert them.

src/app/update/mod.rs

@@ -283,6 +283,11 @@ impl OpenCADStudio {
     }
 
     pub fn update(&mut self, msg: Message) -> Task<Message> {
+        if let Some(tab) = self.tabs.get(self.active_tab) {
+            crate::entities::common::set_unit_context(
+                crate::entities::common::UnitContext::from_header(&tab.scene.document.header),
+            );
+        }
         self.control_observe_user_message(&msg);
         let perf_started = crate::perf::enabled().then(Instant::now);
         let perf_label = perf_message_label(&msg);
@@ -4596,6 +4601,9 @@ impl OpenCADStudio {
                 self.tabs[i].dirty = true;
                 self.tabs[i].scene.bump_geometry();
                 self.refresh_properties();
+                crate::entities::common::set_unit_context(
+                    crate::entities::common::UnitContext::from_header(&self.tabs[i].scene.document.header),
+                );
                 Task::none()
             }
             Message::ToleranceDialogField(field) => {
@@ -4646,6 +4654,9 @@ impl OpenCADStudio {
                 self.tabs[i].dirty = true;
                 self.tabs[i].scene.bump_geometry();
                 self.refresh_properties();
+                crate::entities::common::set_unit_context(
+                    crate::entities::common::UnitContext::from_header(&self.tabs[i].scene.document.header),
+                );
                 let label = crate::modules::draw::units::linear_format_label(code);
                 self.command_line
                     .push_output(crate::tf!("Length format is now {label}.").as_ref());