添加中断，修复电脑手机运行时信号

pages/Chat/Chat.css

@@ -334,6 +334,14 @@
 	flex-direction: column;
 }
 
+/* ==========加载更多提示========== */
+.load-more-tip {
+	text-align: center;
+	padding: 20rpx 0;
+	font-size: 24rpx;
+	color: #999;
+}
+
 /* ==========聊天对话展示部分========== */
 .chat-messages {
 	display: flex;
@@ -603,6 +611,18 @@
 	box-shadow: none;
 }
 
+/* PC端中断发送按钮 */
+.stop-message-btn {
+	background: linear-gradient(135deg, #ff4d4f, #ff6b6b);
+	box-shadow: 0 4rpx 12rpx rgba(255, 77, 79, 0.35);
+	animation: pulseStop 1.8s ease-in-out infinite;
+}
+
+.stop-message-btn:active {
+	transform: scale(0.92);
+	box-shadow: 0 2rpx 6rpx rgba(255, 77, 79, 0.25);
+}
+
 .input-btn-group {
 	flex-shrink: 0;
 	display: flex;