feat: refactor frontend sidepanel to detailPanel naming.

frontend/src/app/DocumentsRoute.tsx

@@ -69,7 +69,7 @@ const DocumentsInner: React.FC<{
     <DocumentOpenProvider
       onOpenViewer={onNavigate}
       onOpenPreview={openPreview}
-      onOpenSidepanel={openDetailPanel}
+      onOpenDetailPanel={openDetailPanel}
     >
       {renderSurface()}
     </DocumentOpenProvider>

frontend/src/lib/context/DocumentOpenContext.tsx

@@ -15,14 +15,14 @@ interface DocumentOpenProviderProps {
     children: React.ReactNode;
     onOpenViewer?: (docId: Identifier) => void;
     onOpenPreview?: (doc: Document) => void;
-    onOpenSidepanel?: (docId: Identifier) => void;
+    onOpenDetailPanel?: (docId: Identifier) => void;
 }
 
 export const DocumentOpenProvider: React.FC<DocumentOpenProviderProps> = ({
     children,
     onOpenViewer,
     onOpenPreview,
-    onOpenSidepanel,
+    onOpenDetailPanel,
 }) => {
     const openDocument = useCallback((doc: Document, target: DocumentOpenTarget = 'preview') => {
         if (!doc) return;
@@ -34,8 +34,8 @@ export const DocumentOpenProvider: React.FC<DocumentOpenProviderProps> = ({
                 }
                 break;
             case 'sidepanel':
-                if (onOpenSidepanel) {
-                    onOpenSidepanel(doc.id);
+                if (onOpenDetailPanel) {
+                    onOpenDetailPanel(doc.id);
                 }
                 break;
             case 'viewer':
@@ -44,7 +44,7 @@ export const DocumentOpenProvider: React.FC<DocumentOpenProviderProps> = ({
                 }
                 break;
         }
-    }, [onOpenPreview, onOpenSidepanel, onOpenViewer]);
+    }, [onOpenPreview, onOpenDetailPanel, onOpenViewer]);
 
     return (
         <DocumentOpenContext.Provider value={{ openDocument }}>

frontend/src/viewer/logic/useDetailWorkspace.ts

@@ -45,6 +45,8 @@ interface UseDetailWorkspaceResult {
   openDetailPanel: ReturnType<typeof useDetailPanel>['openDetailPanel'];
   closeDetailPanel: ReturnType<typeof useDetailPanel>['closeDetailPanel'];
   handleDetailPanelClose: () => void;
+  previewActive: boolean;
+  previewWorkspaceDocument: Document | null;
   resolveThumbnailUrlForDoc: (doc: Document | null) => string | null;
   resolveFolderPath: (folderId?: Identifier | 'root') => Array<{ id: Identifier | 'root'; name: string }>;
 }