perf(export): reuse list message count in detail

electron/services/chatService.ts

@@ -4954,24 +4954,10 @@ class ChatService {
         }
       }
 
-      const [contactResult, avatarResult] = await Promise.allSettled([
+      const contactPromise = wcdbService.getContact(normalizedSessionId)
-        wcdbService.getContact(normalizedSessionId),
+      const avatarPromise = avatarUrl
-        avatarUrl ? Promise.resolve({ success: true, map: { [normalizedSessionId]: avatarUrl } }) : wcdbService.getAvatarUrls([normalizedSessionId])
+        ? Promise.resolve({ success: true, map: { [normalizedSessionId]: avatarUrl } })
-      ])
+        : wcdbService.getAvatarUrls([normalizedSessionId])
-
-      if (contactResult.status === 'fulfilled' && contactResult.value.success && contactResult.value.contact) {
-        remark = contactResult.value.contact.remark || undefined
-        nickName = contactResult.value.contact.nickName || undefined
-        alias = contactResult.value.contact.alias || undefined
-        displayName = remark || nickName || alias || displayName
-      }
-
-      if (avatarResult.status === 'fulfilled' && avatarResult.value.success && avatarResult.value.map) {
-        const avatarCandidate = avatarResult.value.map[normalizedSessionId]
-        if (this.isValidAvatarUrl(avatarCandidate)) {
-          avatarUrl = avatarCandidate
-        }
-      }
 
       let messageCount: number | undefined
       const cachedCount = this.sessionMessageCountCache.get(normalizedSessionId)
@@ -4988,10 +4974,38 @@ class ChatService {
         }
       }
 
+      const messageCountPromise = Number.isFinite(messageCount)
+        ? Promise.resolve<{ success: boolean; count?: number }>({
+          success: true,
+          count: Math.max(0, Math.floor(messageCount as number))
+        })
+        : wcdbService.getMessageCount(normalizedSessionId)
+
+      const [contactResult, avatarResult, messageCountResult] = await Promise.allSettled([
+        contactPromise,
+        avatarPromise,
+        messageCountPromise
+      ])
+
+      if (contactResult.status === 'fulfilled' && contactResult.value.success && contactResult.value.contact) {
+        remark = contactResult.value.contact.remark || undefined
+        nickName = contactResult.value.contact.nickName || undefined
+        alias = contactResult.value.contact.alias || undefined
+        displayName = remark || nickName || alias || displayName
+      }
+
+      if (avatarResult.status === 'fulfilled' && avatarResult.value.success && avatarResult.value.map) {
+        const avatarCandidate = avatarResult.value.map[normalizedSessionId]
+        if (this.isValidAvatarUrl(avatarCandidate)) {
+          avatarUrl = avatarCandidate
+        }
+      }
+
       if (!Number.isFinite(messageCount)) {
-        const countResult = await wcdbService.getMessageCount(normalizedSessionId)
+        messageCount = messageCountResult.status === 'fulfilled' &&
-        messageCount = countResult.success && Number.isFinite(countResult.count)
+          messageCountResult.value.success &&
-          ? Math.max(0, Math.floor(countResult.count || 0))
+          Number.isFinite(messageCountResult.value.count)
+          ? Math.max(0, Math.floor(messageCountResult.value.count || 0))
           : 0
         this.sessionMessageCountCache.set(normalizedSessionId, {
           count: messageCount,

src/pages/ExportPage.tsx

@@ -2875,9 +2875,11 @@ function ExportPage() {
     const requestSeq = ++detailRequestSeqRef.current
     const mappedSession = sessionRowByUsername.get(normalizedSessionId)
     const mappedContact = contactByUsername.get(normalizedSessionId)
+    const countedCount = normalizeMessageCount(sessionMessageCounts[normalizedSessionId])
     const hintedCount = typeof mappedSession?.messageCountHint === 'number' && Number.isFinite(mappedSession.messageCountHint) && mappedSession.messageCountHint >= 0
       ? Math.floor(mappedSession.messageCountHint)
       : undefined
+    const initialMessageCount = countedCount ?? hintedCount
 
     setCopiedDetailField(null)
     setIsRefreshingSessionDetailStats(false)
@@ -2891,7 +2893,7 @@ function ExportPage() {
         nickName: sameSession ? prev?.nickName : mappedContact?.nickname,
         alias: sameSession ? prev?.alias : undefined,
         avatarUrl: mappedSession?.avatarUrl || mappedContact?.avatarUrl || (sameSession ? prev?.avatarUrl : undefined),
-        messageCount: hintedCount ?? (sameSession ? prev.messageCount : Number.NaN),
+        messageCount: initialMessageCount ?? (sameSession ? prev.messageCount : Number.NaN),
         voiceMessages: sameSession ? prev?.voiceMessages : undefined,
         imageMessages: sameSession ? prev?.imageMessages : undefined,
         videoMessages: sameSession ? prev?.videoMessages : undefined,
@@ -3035,7 +3037,7 @@ function ExportPage() {
         setIsLoadingSessionDetailExtra(false)
       }
     }
-  }, [applySessionDetailStats, contactByUsername, sessionRowByUsername])
+  }, [applySessionDetailStats, contactByUsername, sessionMessageCounts, sessionRowByUsername])
 
   const loadSessionRelationStats = useCallback(async () => {
     const normalizedSessionId = String(sessionDetail?.wxid || '').trim()