feat(export): fast accurate content session counts on cards

electron/preload.ts

@@ -134,6 +134,10 @@ contextBridge.exposeInMainWorld('electronAPI', {
     getExportTabCounts: () => ipcRenderer.invoke('chat:getExportTabCounts'),
     getContactTypeCounts: () => ipcRenderer.invoke('chat:getContactTypeCounts'),
     getSessionMessageCounts: (sessionIds: string[]) => ipcRenderer.invoke('chat:getSessionMessageCounts', sessionIds),
+    getExportContentSessionCounts: (options?: { triggerRefresh?: boolean; forceRefresh?: boolean }) =>
+      ipcRenderer.invoke('chat:getExportContentSessionCounts', options),
+    refreshExportContentSessionCounts: (options?: { forceRefresh?: boolean }) =>
+      ipcRenderer.invoke('chat:refreshExportContentSessionCounts', options),
     enrichSessionsContactInfo: (usernames: string[]) =>
       ipcRenderer.invoke('chat:enrichSessionsContactInfo', usernames),
     getMessages: (sessionId: string, offset?: number, limit?: number, startTime?: number, endTime?: number, ascending?: boolean) =>