feat:新增了切换账号的功能

src/pages/ExportPage.tsx

@@ -157,6 +157,19 @@ function ExportPage() {
     loadExportDefaults()
   }, [loadSessions, loadExportPath, loadExportDefaults])
 
+  useEffect(() => {
+    const handleChange = () => {
+      setSelectedSessions(new Set())
+      setSearchKeyword('')
+      setExportResult(null)
+      setSessions([])
+      setFilteredSessions([])
+      loadSessions()
+    }
+    window.addEventListener('wxid-changed', handleChange as EventListener)
+    return () => window.removeEventListener('wxid-changed', handleChange as EventListener)
+  }, [loadSessions])
+
   useEffect(() => {
     const removeListener = window.electronAPI.export.onProgress?.((payload) => {
       setExportProgress({