fix(export,sns): preserve sns load state across route switches

src/pages/ExportPage.tsx

@@ -1977,8 +1977,40 @@ function ExportPage() {
       return
     }
 
-    patchSessionLoadTraceStage(targetSessionIds, 'snsPostCounts', 'pending', { force: true })
-    patchSessionLoadTraceStage(targetSessionIds, 'snsPostCounts', 'loading')
+    const scopeKey = exportCacheScopeReadyRef.current
+      ? exportCacheScopeRef.current
+      : await ensureExportCacheScope()
+    const targetSet = new Set(targetSessionIds)
+    let cachedCounts: Record<string, number> = {}
+    try {
+      const cached = await configService.getExportSnsUserPostCountsCache(scopeKey)
+      cachedCounts = cached?.counts || {}
+    } catch (cacheError) {
+      console.error('读取导出页朋友圈条数缓存失败:', cacheError)
+    }
+
+    const cachedTargetCounts = Object.entries(cachedCounts).reduce<Record<string, number>>((acc, [sessionId, countRaw]) => {
+      if (!targetSet.has(sessionId)) return acc
+      const nextCount = Number(countRaw)
+      acc[sessionId] = Number.isFinite(nextCount) ? Math.max(0, Math.floor(nextCount)) : 0
+      return acc
+    }, {})
+    const cachedReadySessionIds = Object.keys(cachedTargetCounts)
+    if (cachedReadySessionIds.length > 0) {
+      setSnsUserPostCounts(prev => ({ ...prev, ...cachedTargetCounts }))
+      patchSessionLoadTraceStage(cachedReadySessionIds, 'snsPostCounts', 'done')
+    }
+
+    const pendingSessionIds = options?.force
+      ? targetSessionIds
+      : targetSessionIds.filter((sessionId) => !(sessionId in cachedTargetCounts))
+    if (pendingSessionIds.length === 0) {
+      setSnsUserPostCountsStatus('ready')
+      return
+    }
+
+    patchSessionLoadTraceStage(pendingSessionIds, 'snsPostCounts', 'pending', { force: true })
+    patchSessionLoadTraceStage(pendingSessionIds, 'snsPostCounts', 'loading')
     setSnsUserPostCountsStatus('loading')
 
     let normalizedCounts: Record<string, number> = {}
@@ -1987,7 +2019,7 @@ function ExportPage() {
       if (runToken !== snsUserPostCountsHydrationTokenRef.current) return
 
       if (!result.success || !result.counts) {
-        patchSessionLoadTraceStage(targetSessionIds, 'snsPostCounts', 'failed', {
+        patchSessionLoadTraceStage(pendingSessionIds, 'snsPostCounts', 'failed', {
           error: result.error || '朋友圈条数统计失败'
         })
         setSnsUserPostCountsStatus('error')
@@ -2003,9 +2035,6 @@ function ExportPage() {
 
       void (async () => {
         try {
-          const scopeKey = exportCacheScopeReadyRef.current
-            ? exportCacheScopeRef.current
-            : await ensureExportCacheScope()
           await configService.setExportSnsUserPostCountsCache(scopeKey, normalizedCounts)
         } catch (cacheError) {
           console.error('写入导出页朋友圈条数缓存失败:', cacheError)
@@ -2014,7 +2043,7 @@ function ExportPage() {
     } catch (error) {
       console.error('加载朋友圈用户条数失败:', error)
       if (runToken !== snsUserPostCountsHydrationTokenRef.current) return
-      patchSessionLoadTraceStage(targetSessionIds, 'snsPostCounts', 'failed', {
+      patchSessionLoadTraceStage(pendingSessionIds, 'snsPostCounts', 'failed', {
         error: String(error)
       })
       setSnsUserPostCountsStatus('error')
@@ -2025,7 +2054,7 @@ function ExportPage() {
     const applyBatch = () => {
       if (runToken !== snsUserPostCountsHydrationTokenRef.current) return
 
-      const batchSessionIds = targetSessionIds.slice(cursor, cursor + SNS_USER_POST_COUNT_BATCH_SIZE)
+      const batchSessionIds = pendingSessionIds.slice(cursor, cursor + SNS_USER_POST_COUNT_BATCH_SIZE)
       if (batchSessionIds.length === 0) {
         setSnsUserPostCountsStatus('ready')
         snsUserPostCountsBatchTimerRef.current = null
@@ -2984,7 +3013,7 @@ function ExportPage() {
     }
     setIsSessionEnriching(false)
     setIsLoadingSessionCounts(false)
-    setSnsUserPostCountsStatus('idle')
+    setSnsUserPostCountsStatus(prev => (prev === 'loading' ? 'idle' : prev))
   }, [isExportRoute])
 
   useEffect(() => {

src/pages/SnsPage.tsx

@@ -504,7 +504,10 @@ export default function SnsPage() {
         }
     }, [])
 
-    const hydrateContactPostCounts = useCallback(async (usernames: string[], options?: { force?: boolean }) => {
+    const hydrateContactPostCounts = useCallback(async (
+        usernames: string[],
+        options?: { force?: boolean; readyUsernames?: Set<string> }
+    ) => {
         const force = options?.force === true
         const targets = usernames
             .map((username) => String(username || '').trim())
@@ -512,7 +515,7 @@ export default function SnsPage() {
         stopContactsCountHydration(true)
         if (targets.length === 0) return
 
-        const readySet = new Set(
+        const readySet = options?.readyUsernames || new Set(
             contactsRef.current
                 .filter((contact) => contact.postCountStatus === 'ready' && typeof contact.postCount === 'number')
                 .map((contact) => contact.username)
@@ -625,8 +628,42 @@ export default function SnsPage() {
         setContactsLoading(true)
         try {
             const snsPostCountsScopeKey = await ensureSnsUserPostCountsCacheScopeKey()
-            const cachedPostCountsItem = await configService.getExportSnsUserPostCountsCache(snsPostCountsScopeKey)
+            const [cachedPostCountsItem, cachedContactsItem, cachedAvatarItem] = await Promise.all([
+                configService.getExportSnsUserPostCountsCache(snsPostCountsScopeKey),
+                configService.getContactsListCache(snsPostCountsScopeKey),
+                configService.getContactsAvatarCache(snsPostCountsScopeKey)
+            ])
             const cachedPostCounts = cachedPostCountsItem?.counts || {}
+            const cachedAvatarMap = cachedAvatarItem?.avatars || {}
+            const cachedContacts = (cachedContactsItem?.contacts || [])
+                .filter((contact) => contact.type === 'friend' || contact.type === 'former_friend')
+                .map((contact) => {
+                    const cachedCount = cachedPostCounts[contact.username]
+                    const hasCachedCount = typeof cachedCount === 'number' && Number.isFinite(cachedCount)
+                    return {
+                        username: contact.username,
+                        displayName: contact.displayName || contact.username,
+                        avatarUrl: cachedAvatarMap[contact.username]?.avatarUrl,
+                        type: (contact.type === 'former_friend' ? 'former_friend' : 'friend') as 'friend' | 'former_friend',
+                        lastSessionTimestamp: 0,
+                        postCount: hasCachedCount ? Math.max(0, Math.floor(cachedCount)) : undefined,
+                        postCountStatus: hasCachedCount ? 'ready' as ContactPostCountStatus : 'idle' as ContactPostCountStatus
+                    }
+                })
+
+            if (requestToken !== contactsLoadTokenRef.current) return
+            if (cachedContacts.length > 0) {
+                const cachedContactsSorted = sortContactsForRanking(cachedContacts)
+                setContacts(cachedContactsSorted)
+                setContactsLoading(false)
+                const cachedReadyCount = cachedContactsSorted.filter(contact => contact.postCountStatus === 'ready').length
+                setContactsCountProgress({
+                    resolved: cachedReadyCount,
+                    total: cachedContactsSorted.length,
+                    running: cachedReadyCount < cachedContactsSorted.length
+                })
+            }
+
             const [contactsResult, sessionsResult] = await Promise.all([
                 window.electronAPI.chat.getContacts(),
                 window.electronAPI.chat.getSessions()
@@ -670,7 +707,15 @@ export default function SnsPage() {
             let contactsList = sortContactsForRanking(Array.from(contactMap.values()))
             if (requestToken !== contactsLoadTokenRef.current) return
             setContacts(contactsList)
-            void hydrateContactPostCounts(contactsList.map(contact => contact.username))
+            const readyUsernames = new Set(
+                contactsList
+                    .filter((contact) => contact.postCountStatus === 'ready' && typeof contact.postCount === 'number')
+                    .map((contact) => contact.username)
+            )
+            void hydrateContactPostCounts(
+                contactsList.map(contact => contact.username),
+                { readyUsernames }
+            )
 
             const allUsernames = contactsList.map(c => c.username)
 
@@ -880,6 +925,7 @@ export default function SnsPage() {
     useEffect(() => {
         const handleChange = () => {
             cacheScopeKeyRef.current = ''
+            snsUserPostCountsCacheScopeKeyRef.current = ''
             // wxid changed, reset everything
             stopContactsCountHydration(true)
             setContacts([])