修复聊天最后一条跑到最上面的问题

keyBoard/Class/AiTalk/VC/KBAIHomeVC.m

@@ -451,7 +451,7 @@
 #pragma mark - Private
 
 - (void)updateChatViewBottomInset {
-    // 问题2修复：键盘弹起时，增加 bottomInset 让最后一条消息显示在 VoiceInputBar 上方
+    // 键盘弹起时，增加 bottomInset 让最后一条消息显示在 VoiceInputBar 上方
     CGFloat bottomInset;
     
     if (self.currentKeyboardHeight > 0.0) {
@@ -468,13 +468,13 @@
         bottomInset = (self.currentKeyboardHeight + self.voiceInputBarHeight) - chatViewPhysicalBottomSpace;
         
         // 确保不会是负数
-        bottomInset = MAX(bottomInset, 20);
+        bottomInset = MAX(bottomInset, 0);
         
         NSLog(@"[KBAIHomeVC] 键盘弹起 - bottomInset: %.2f (键盘: %.2f + InputBar: %.2f - 已避开: %.2f)", 
               bottomInset, self.currentKeyboardHeight, self.voiceInputBarHeight, chatViewPhysicalBottomSpace);
     } else {
-        // 键盘隐藏时：恢复原来的 bottomInset
-        bottomInset = 20; // 简单的缓冲空间
+        // 键盘隐藏时：不需要额外的 bottomInset
+        bottomInset = 0;
         NSLog(@"[KBAIHomeVC] 键盘隐藏 - bottomInset: %.2f", bottomInset);
     }
     
@@ -486,21 +486,11 @@
             // 键盘弹起时，自动滚动到最后一条消息
             if (self.currentKeyboardHeight > 0.0) {
                 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
-                    [cell.chatView scrollToBottom];  // 修复：使用无参数的方法
+                    [cell.chatView scrollToBottom];
                 });
             }
         }
     }
-
-    
-    NSLog(@"[KBAIHomeVC] 更新 ChatView bottomInset: %.2f (键盘高度: %.2f)", bottomInset, self.currentKeyboardHeight);
-    
-    for (NSIndexPath *indexPath in self.collectionView.indexPathsForVisibleItems) {
-        KBPersonaChatCell *cell = (KBPersonaChatCell *)[self.collectionView cellForItemAtIndexPath:indexPath];
-        if (cell) {
-            [cell updateChatViewBottomInset:bottomInset];
-        }
-    }
 }
 
 - (void)showChatLimitPopWithMessage:(NSString *)message {