placeholders looking good and sync page sizes with android

apps/ios/Shared/Model/SimpleXAPI.swift

@@ -318,8 +318,8 @@ private func apiChatsResponse(_ r: ChatResponse) throws -> [ChatData] {
     throw r
 }
 
-let loadItemsPerPage = 50
-let preloadItem = 8
+let loadItemsPerPage = 100
+let preloadItem = 25
 let idealChatListSize = 500
 
 func apiGetChat(type: ChatType, id: Int64, search: String = "") async throws -> (Chat, Int?) {

apps/ios/Shared/Views/Chat/ChatItemView.swift

@@ -62,8 +62,6 @@ struct ChatItemView: View {
                 CIVoiceView(chat: chat, chatItem: ci, recordingFile: ci.file, duration: duration, allowMenu: $allowMenu)
             } else if ci.content.msgContent == nil {
                 ChatItemContentView(chat: chat, chatItem: chatItem, msgContentView: { Text(ci.text) }) // msgContent is unreachable branch in this case
-            } else if ci.isPlaceholder {
-                EmptyView()
             } else {
                 framedItemView()
             }

apps/ios/Shared/Views/Chat/ReverseList.swift

@@ -220,7 +220,11 @@ struct ReverseList<Content: View>: UIViewControllerRepresentable {
             var snapshot = NSDiffableDataSourceSnapshot<Section, ChatItem>()
             if let gap = gap {
                 var itemsCopy = items
-                let blanks = (0..<gap.size).map { index in ChatItem.placeholder(index + 1) }
+                let blanks = (0..<gap.size).map { index in
+                    // Using existing text instead of random rumble or empty text does make long scroll look natural.
+                    let sourceItem = items[index % items.count]
+                    return ChatItem.placeholder(idx: index + 1, text: sourceItem.text, chatDir: sourceItem.chatDir)
+                }
                 itemsCopy.insert(contentsOf: blanks, at: gap.index)
                 renderedItems = itemsCopy
             } else {

apps/ios/SimpleXChat/ChatTypes.swift

@@ -2665,13 +2665,13 @@ public struct ChatItem: Identifiable, Decodable, Hashable {
         return item
     }
 
-    public static func placeholder(_ idx: Int) -> ChatItem {
+    public static func placeholder(idx: Int, text: String, chatDir: CIDirection) -> ChatItem {
         var item = ChatItem(
-            chatDir: CIDirection.directSnd,
+            chatDir: chatDir,
             meta: CIMeta(
                 itemId: Int64(idx * -10),
                 itemTs: .now,
-                itemText: "",
+                itemText: text,
                 itemStatus: .rcvRead,
                 createdAt: .now,
                 updatedAt: .now,
@@ -2681,7 +2681,7 @@ public struct ChatItem: Identifiable, Decodable, Hashable {
                 deletable: false,
                 editable: false
             ),
-            content: .sndMsgContent(msgContent: .text("")),
+            content: .sndMsgContent(msgContent: .text(text)),
             quotedItem: nil,
             file: nil
         )