fix(chat): respect user scroll and tighten markdown

src/api.ts

@@ -612,6 +612,7 @@ async function consumeSSE(resp: Response, h: StreamEvents, signal?: AbortSignal)
       const { value, done } = await reader.read();
       if (done) break;
       buf += decoder.decode(value, { stream: true });
+      buf = buf.replace(/\r\n/g, '\n');
 
       let idx;
       while ((idx = buf.indexOf('\n\n')) !== -1) {
@@ -623,7 +624,11 @@ async function consumeSSE(resp: Response, h: StreamEvents, signal?: AbortSignal)
         let dataStr = '';
         for (const line of raw.split('\n')) {
           if (line.startsWith('event:')) event = line.slice(6).trim();
-          else if (line.startsWith('data:')) dataStr += line.slice(5).trim();
+          else if (line.startsWith('data:')) {
+            let part = line.slice(5);
+            if (part.startsWith(' ')) part = part.slice(1);
+            dataStr += (dataStr ? '\n' : '') + part;
+          }
         }
         if (!dataStr) continue;
         let data: any;

src/pages/ChatPage.tsx

@@ -72,6 +72,7 @@ export default function ChatPage() {
   const bodyRef = useRef<HTMLDivElement>(null);
   const abortRef = useRef<AbortController | null>(null);
   const creatingSessionRef = useRef(false);
+  const autoScrollRef = useRef(true);
 
   // URL 参数 ?session=xxx&msg=yyy
   useEffect(() => {
@@ -88,12 +89,25 @@ export default function ChatPage() {
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [searchParams]);
 
-  const scrollBottom = () => {
+  const scrollBottom = (force = false) => {
+    if (!force && !autoScrollRef.current) return;
     requestAnimationFrame(() => {
       bodyRef.current?.scrollTo({ top: bodyRef.current.scrollHeight, behavior: 'smooth' });
     });
   };
 
+  useEffect(() => {
+    const el = bodyRef.current;
+    if (!el) return;
+    const onScroll = () => {
+      const distance = el.scrollHeight - el.scrollTop - el.clientHeight;
+      autoScrollRef.current = distance < 32;
+    };
+    el.addEventListener('scroll', onScroll, { passive: true });
+    onScroll();
+    return () => el.removeEventListener('scroll', onScroll);
+  }, []);
+
   const loadAgent = async () => {
     if (!id) {
       setAgent(null);
@@ -198,7 +212,7 @@ export default function ChatPage() {
       retrieved: [],
       toolCalls: []
     });
-    scrollBottom();
+    scrollBottom(true);
 
     abortRef.current?.abort();
     const ctrl = new AbortController();
@@ -265,7 +279,7 @@ export default function ChatPage() {
             setSessionRefresh((t) => t + 1);
             setAttachments([]); // 用完即清
             setImageUrls([]);
-            scrollBottom();
+            scrollBottom(true);
           },
           onAborted: (data) => {
             // 已停止：保留已生成内容；user 消息也留下（用 tempUser 占位）
@@ -322,7 +336,7 @@ export default function ChatPage() {
       createdAt: Date.now()
     };
     setMessages((m) => [...(m || []), tempUser]);
-    scrollBottom();
+    scrollBottom(true);
     const attText = buildAttachmentsText();
     const content = attText ? `${text}\n\n${attText}` : text;
     const model = overrides.model || parseAgentModels(agent?.model)[0] || '';

src/styles.css

@@ -539,6 +539,30 @@ body {
   margin-bottom: 0;
 }
 
+.bubble.assistant h1,
+.bubble.assistant h2,
+.bubble.assistant h3,
+.bubble.assistant h4,
+.bubble.assistant h5,
+.bubble.assistant h6 {
+  margin: 0.5em 0 0.25em;
+  line-height: 1.3;
+}
+
+.bubble.assistant ol,
+.bubble.assistant ul {
+  margin: 0.4em 0;
+  padding-left: 1.25em;
+}
+
+.bubble.assistant li {
+  margin: 0.15em 0;
+}
+
+.bubble.assistant hr {
+  margin: 0.8em 0;
+}
+
 .chat-input-wrapper {
   width: 100%;
   max-width: 820px;