feat：dify聊天页面接入消息反馈、复制功能

app/styles/components/chat-with-llm/chat-message.css

@@ -106,6 +106,65 @@
     gap: 8px;
 }
 
+/* 消息反馈按钮 */
+.message-feedback {
+    display: flex;
+    gap: 4px;
+    margin-top: 8px;
+    padding-top: 8px;
+    border-top: 1px solid rgba(0, 0, 0, 0.06);
+    justify-content: space-between;
+    align-items: center;
+}
+
+.message-copy-btn {
+    color: #52c41a !important;
+    transition: all 0.2s ease;
+}
+
+.message-copy-btn:hover {
+    color: #00684a !important;
+    background: rgba(0, 104, 74, 0.1) !important;
+}
+
+.message-copy-btn.copied {
+    color: #00684a !important;
+}
+
+.feedback-actions-right {
+    display: flex;
+    gap: 4px;
+    align-items: center;
+}
+
+.message-feedback .ant-btn {
+    color: #8c8c8c;
+    transition: all 0.2s ease;
+}
+
+.message-feedback .ant-btn:hover {
+    color: #52c41a;
+    background: rgba(24, 144, 255, 0.1);
+}
+
+.message-feedback .feedback-active-like {
+    color: #52c41a !important;
+}
+
+.message-feedback .feedback-active-like:hover {
+    color: #52c41a !important;
+    background: rgba(82, 196, 26, 0.1);
+}
+
+.message-feedback .feedback-active-dislike {
+    color: #ff4d4f !important;
+}
+
+.message-feedback .feedback-active-dislike:hover {
+    color: #ff4d4f !important;
+    background: rgba(255, 77, 79, 0.1);
+}
+
 /* 建议问题 */
 .suggested-questions {
     margin-top: 16px;