feat: Remove documentLink prop and onNavigatorSnapshot logic, and add openDetailPanel and closeDetailPanel to document shell.

frontend/src/app/PanelManagerContext.tsx

@@ -89,9 +89,11 @@ const applyPanelWidthToRoot = (panel: PanelKey, width: number, active: boolean):
 
 interface PanelManagerProviderProps {
   children: ReactNode;
+  isOpen?: boolean;
+  onClose?: () => void;
 }
 
-export const PanelManagerProvider: React.FC<PanelManagerProviderProps> = ({ children }) => {
+export const PanelManagerProvider: React.FC<PanelManagerProviderProps> = ({ children, isOpen, onClose }) => {
   const { collapsed, setCollapsed } = useSidebarContext();
   const initialSidebarWidth = readStoredWidth('sidebar', DEFAULT_SIDEBAR_WIDTH);
   const initialDetailWidth = readStoredWidth('detail', DEFAULT_DETAIL_WIDTH);
@@ -100,7 +102,13 @@ export const PanelManagerProvider: React.FC<PanelManagerProviderProps> = ({ chil
   const [detailWidth, setDetailWidthState] = useState(() => clampPanelWidth('detail', initialDetailWidth));
   const [resizingPanel, setResizingPanel] = useState(null);
   const [sidebarSuppressed, setSidebarSuppressed] = useState(false);
-  const [detailPanelOpen, setDetailPanelOpen] = useState(false);
+  const [detailPanelOpen, setDetailPanelOpen] = useState(Boolean(isOpen));
+
+  useEffect(() => {
+    if (isOpen !== undefined) {
+      setDetailPanelOpen(isOpen);
+    }
+  }, [isOpen]);
 
   const detailCloseHandlerRef = useRef(null);
   const panelWidthsRef = useRef({ sidebar: sidebarWidth, detail: detailWidth });
@@ -109,7 +117,11 @@ export const PanelManagerProvider: React.FC<PanelManagerProviderProps> = ({ chil
   const closeDetailPanel = useCallback(() => {
     const handler = detailCloseHandlerRef.current;
     handler?.();
-  }, []);
+    onClose?.();
+    if (isOpen === undefined) {
+      setDetailPanelOpen(false);
+    }
+  }, [onClose, isOpen]);
 
   useEffect(() => {
     panelWidthsRef.current.sidebar = sidebarWidth;
@@ -228,11 +240,16 @@ export const PanelManagerProvider: React.FC<PanelManagerProviderProps> = ({ chil
   }, []);
 
   const setDetailActive = useCallback(
-    (isOpen) => {
-      setDetailPanelOpen(Boolean(isOpen));
-      handlePanelLayoutChange('detail', isOpen ? 'opened' : 'closed');
+    (active) => {
+      if (isOpen === undefined) {
+        setDetailPanelOpen(Boolean(active));
+      }
+      if (!active) {
+        onClose?.();
+      }
+      handlePanelLayoutChange('detail', active ? 'opened' : 'closed');
     },
-    [handlePanelLayoutChange],
+    [handlePanelLayoutChange, isOpen, onClose],
   );
 
   const expandSidebar = useCallback(() => {
@@ -394,8 +411,8 @@ export const usePanelResizeBindings = (
 
   const handleProps = enabled
     ? {
-        onPointerDown: handlePointerDown,
-      }
+      onPointerDown: handlePointerDown,
+    }
     : {};
 
   return {