bug修复

CustomKeyboard/KeyboardViewController.m

@@ -102,6 +102,7 @@ static void KBSkinInstallNotificationCallback(CFNotificationCenterRef center,
 @property(nonatomic, strong) NSMutableArray<KBChatMessage *> *chatMessages;
 @property(nonatomic, strong) AVAudioPlayer *chatAudioPlayer;
 @property(nonatomic, assign) BOOL chatPanelVisible;
+@property(nonatomic, copy) NSString *chatPanelBaselineText; // 打开聊天面板时宿主输入框已有的文本
 @property(nonatomic, strong, nullable) id kb_fullAccessObserverToken;
 @property(nonatomic, strong, nullable) id kb_skinObserverToken;
 @end
@@ -563,6 +564,9 @@ static NSString *KBFormatMB(uint64_t bytes) {
   }
   self.chatPanelVisible = show;
   if (show) {
+    // 记录打开聊天面板时宿主输入框已有的文本，发送时只取新增部分
+    [[KBInputBufferManager shared] refreshFromProxyIfPossible:self.textDocumentProxy];
+    self.chatPanelBaselineText = [KBInputBufferManager shared].liveText ?: @"";
     [self kb_ensureChatPanelViewIfNeeded];
     self.chatPanelView.hidden = NO;
     self.chatPanelView.alpha = 0.0;
@@ -1033,7 +1037,15 @@ static NSString *KBFormatMB(uint64_t bytes) {
     return;
   }
   [[KBInputBufferManager shared] refreshFromProxyIfPossible:self.textDocumentProxy];
-  NSString *rawText = [KBInputBufferManager shared].liveText ?: @"";
+  NSString *fullText = [KBInputBufferManager shared].liveText ?: @"";
+  
+  // 去掉打开聊天面板前宿主输入框里已有的基线文本，只取新增部分
+  NSString *baseline = self.chatPanelBaselineText ?: @"";
+  NSString *rawText = fullText;
+  if (baseline.length > 0 && [fullText hasPrefix:baseline]) {
+    rawText = [fullText substringFromIndex:baseline.length];
+  }
+  
   NSString *trim =
       [rawText stringByTrimmingCharactersInSet:
                   [NSCharacterSet whitespaceAndNewlineCharacterSet]];
@@ -1042,6 +1054,7 @@ static NSString *KBFormatMB(uint64_t bytes) {
     return;
   }
   [self kb_sendChatText:trim];
+  // 只清除新增的文本，保留基线文本
   [self kb_clearHostInputForText:rawText];
 }