feat(xref): reference list with stale and orphaned status detection

Reference list rows showing stale and orphaned states with handle-based identity.

src/app/update/dialog.rs

@@ -757,6 +757,32 @@ pub(super) fn on_ribbon_tool_click(&mut self, tool_id: String, event: ModuleEven
             self.refresh_block_palette();
         }
     }
+
+    /// Rebuild the Reference Manager's entry list from the active drawing.
+    /// Display-only: `collect_entries` stats files but mutates nothing.
+    pub(crate) fn refresh_xref_manager(&mut self) {
+        let i = self.active_tab;
+        let base_dir: std::path::PathBuf = self.tabs[i]
+            .current_path
+            .as_ref()
+            .and_then(|p| p.parent().map(|p| p.to_path_buf()))
+            .unwrap_or_else(|| std::path::PathBuf::from("."));
+        let tab_id = self.tabs[i].id;
+        self.xref_manager
+            .refresh(&self.tabs[i].scene.document, &base_dir);
+        self.xref_manager.source_tab_id = Some(tab_id);
+    }
+
+    /// Re-scan when the palette is open but showing another tab's drawing.
+    pub(crate) fn refresh_xref_manager_if_stale(&mut self) {
+        if self.active_modal != Some(crate::app::ModalKind::XrefManager) {
+            return;
+        }
+        let i = self.active_tab;
+        if self.xref_manager.source_tab_id != Some(self.tabs[i].id) {
+            self.refresh_xref_manager();
+        }
+    }
 }
 
 #[cfg(test)]

src/app/update/mod.rs

@@ -314,6 +314,9 @@ impl OpenCADStudio {
         // The block panel watches the drawing's block list and rebuilds its
         // thumbnails whenever the names change (BLOCK define, file open, …).
         self.refresh_block_palette_if_stale();
+        // The Reference Manager watches the active drawing and re-scans when
+        // the palette is open on another tab's entries.
+        self.refresh_xref_manager_if_stale();
         // Let V4 plugins observe selection changes that happened while handling
         // this message (picking, window select, QSELECT, SELECTALL, grip edits,
         // and plugin request draining).
@@ -2127,6 +2130,33 @@ impl OpenCADStudio {
                 Task::none()
             }
 
+            Message::ToggleXrefManager => {
+                if self.active_modal == Some(super::ModalKind::XrefManager) {
+                    self.active_modal = None;
+                    self.reset_modal_geometry();
+                } else {
+                    self.refresh_xref_manager();
+                    self.active_modal = Some(super::ModalKind::XrefManager);
+                }
+                Task::none()
+            }
+            Message::XrefManagerRefresh => {
+                self.refresh_xref_manager();
+                Task::none()
+            }
+            Message::XrefManagerSelect(index) => {
+                self.xref_manager.toggle_select(index);
+                Task::none()
+            }
+            Message::XrefManagerToggleTree => {
+                self.xref_manager.toggle_tree();
+                Task::none()
+            }
+            Message::XrefManagerToggleExpand(key) => {
+                self.xref_manager.toggle_expand(key);
+                Task::none()
+            }
+
             Message::LayerStateManagerOpen => {
                 let i = self.active_tab;
                 self.ribbon.close_dropdown();