feat: add ChatMessage component with source links

src/components/ChatMessage/index.jsx

@@ -0,0 +1,31 @@
+import React from 'react';
+import styles from './styles.module.css';
+
+export default function ChatMessage({ message, isStreaming }) {
+  const isUser = message.role === 'user';
+
+  return (
+    <div className={`${styles.message} ${isUser ? styles.messageUser : styles.messageAssistant}`}>
+      <div className={`${styles.bubble} ${isUser ? styles.bubbleUser : styles.bubbleAssistant}`}>
+        {message.content}
+        {!isUser && isStreaming && <span className={styles.cursor} />}
+      </div>
+      {!isUser && message.sources && message.sources.length > 0 && (
+        <div className={styles.sources}>
+          <div className={styles.sourcesTitle}>📎 相关文档</div>
+          {message.sources.map((link, i) => (
+            <a
+              key={i}
+              className={styles.sourceLink}
+              href={link.path}
+              target="_blank"
+              rel="noopener noreferrer"
+            >
+              {link.breadcrumb}
+            </a>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}

src/components/ChatMessage/styles.module.css

@@ -0,0 +1,96 @@
+.message {
+  margin-bottom: 12px;
+  display: flex;
+  flex-direction: column;
+}
+
+.messageUser {
+  align-items: flex-end;
+}
+
+.messageAssistant {
+  align-items: flex-start;
+}
+
+.bubble {
+  max-width: 85%;
+  padding: 10px 14px;
+  border-radius: 12px;
+  font-size: 14px;
+  line-height: 1.6;
+  word-break: break-word;
+  white-space: pre-wrap;
+}
+
+.bubbleUser {
+  background: #e8e8e8;
+  color: #333;
+  border-bottom-right-radius: 4px;
+}
+
+.bubbleAssistant {
+  background: #f0f4ff;
+  color: #333;
+  border-bottom-left-radius: 4px;
+}
+
+[data-theme='dark'] .bubbleUser {
+  background: #3a3a3a;
+  color: #e0e0e0;
+}
+
+[data-theme='dark'] .bubbleAssistant {
+  background: #2a2e4a;
+  color: #e0e0e0;
+}
+
+.sources {
+  margin-top: 8px;
+  padding: 8px 10px;
+  background: rgba(255, 255, 255, 0.6);
+  border: 1px solid #e0e0e0;
+  border-radius: 8px;
+  max-width: 85%;
+  font-size: 12px;
+}
+
+[data-theme='dark'] .sources {
+  background: rgba(255, 255, 255, 0.08);
+  border-color: #444;
+}
+
+.sourcesTitle {
+  color: #666;
+  margin-bottom: 4px;
+  font-weight: 500;
+}
+
+[data-theme='dark'] .sourcesTitle {
+  color: #aaa;
+}
+
+.sourceLink {
+  display: block;
+  color: #466aff;
+  text-decoration: none;
+  padding: 2px 0;
+}
+
+.sourceLink:hover {
+  text-decoration: underline;
+}
+
+.cursor {
+  display: inline-block;
+  width: 2px;
+  height: 16px;
+  background: #466aff;
+  margin-left: 2px;
+  vertical-align: text-bottom;
+  animation: blink 1s infinite;
+}
+
+@keyframes blink {
+  0%, 50% { opacity: 1; }
+  51%, 100% { opacity: 0; }
+}