处理\n

CustomKeyboard/Network/KBStreamFetcher.m

@@ -289,6 +289,15 @@ static NSUInteger kb_validUTF8PrefixLen(NSData *data) {
 - (void)emitChunk:(NSString *)rawText {
     if (rawText.length == 0) return;
     NSString *text = rawText;
+    // 0) 规范化换行与段起始：去掉位于片段开头的 \r/\n；将 "\n\t"、"\r\n\t"、"\r\t" 归一为 "\t"
+    text = [text stringByReplacingOccurrencesOfString:@"\r\n\t" withString:@"\t"];
+    text = [text stringByReplacingOccurrencesOfString:@"\n\t" withString:@"\t"];
+    text = [text stringByReplacingOccurrencesOfString:@"\r\t" withString:@"\t"];
+    while (text.length > 0) {
+        unichar c0 = [text characterAtIndex:0];
+        if (c0 == '\n' || c0 == '\r') { text = [text substringFromIndex:1]; continue; }
+        break;
+    }
     // 1) 统一处理 “/t” -> “\t”
     if (self.treatSlashTAsTab) {
         text = [text stringByReplacingOccurrencesOfString:@"/t" withString:@"\t"];