Add demo badge to all pages for technical sharing event

src/Layout.tsx

@@ -19,7 +19,15 @@ export default function Layout() {
   }, [pathname]);
 
   return (
-    <div className="bg-[#f7f7f9] flex h-screen w-screen overflow-hidden text-txt font-sans">
+    <div className="bg-[#f7f7f9] flex h-screen w-screen overflow-hidden text-txt font-sans relative">
+      {/* Demo Badge */}
+      <div className="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 pointer-events-none z-50 select-none opacity-[0.08] flex flex-col items-center">
+        <div className="border-[8px] border-magenta px-10 py-4 transform -rotate-12 flex flex-col items-center">
+            <span className="text-8xl font-black text-magenta tracking-widest">DEMO ONLY</span>
+            <span className="text-3xl font-bold text-magenta mt-2">TECHNICAL SHARING 2026</span>
+        </div>
+      </div>
+      
       {/* 侧边栏导航 */}
       <aside className="w-64 bg-white border-r border-border flex flex-col z-10 shrink-0">
         <div className="h-16 flex items-center px-6 border-b border-border">
@@ -102,6 +110,12 @@ export default function Layout() {
             </p>
           </div>
         </div>
+
+        {/* Sidebar Demo Badge */}
+        <div className="mx-4 my-4 p-3 border-2 border-dashed border-magenta/20 rounded-xl flex flex-col items-center justify-center text-center bg-magenta/5 rotate-1">
+          <p className="text-[10px] font-black text-magenta uppercase tracking-tighter opacity-70">Tech Sharing</p>
+          <p className="text-[13px] font-black text-magenta -mt-1 uppercase tracking-[0.1em] italic">DEMO ONLY</p>
+        </div>
       </aside>
 
       {/* 主内容区 */}

src/pages/PlanningAgent.tsx

@@ -14,10 +14,32 @@ type ChatMessage = {
 };
 
 type StreamEvent = {
-  type: "thought" | "tool_call" | "tool_result" | "final" | "error";
+  type: "thought" | "tool_call" | "tool_result" | "final" | "error" | "workspace_start" | "workspace_delta" | "workspace_end";
   content: string;
   step?: number;
   tool_name?: string;
+  workspace_title?: string;
+};
+
+type WorkspaceState = {
+  isOpen: boolean;
+  title: string;
+  content: string;
+  isGenerating: boolean;
+};
+
+const WORKSPACE_INIT: WorkspaceState = {
+  isOpen: false,
+  title: "",
+  content: "",
+  isGenerating: false,
+};
+
+type HistorySession = {
+  id: string;
+  sessionId: string;
+  summary: string;
+  ts: number;
 };
 
 type State = {
@@ -26,6 +48,8 @@ type State = {
   messages: ChatMessage[];
   reasoning: Record<string, string>; // Map message ID to its reasoning/traces
   chatting: boolean;
+  historySessions: HistorySession[];
+  workspace: WorkspaceState;
   error?: string;
 };
 
@@ -35,7 +59,13 @@ type Action =
   | { type: "update-reasoning"; id: string; content: string }
   | { type: "set-chatting"; v: boolean }
   | { type: "set-error"; v?: string }
-  | { type: "reset"; sessionId: string; userId: string };
+  | { type: "set-history"; sessions: HistorySession[] }
+  | { type: "load-session"; sessionId: string; messages: ChatMessage[] }
+  | { type: "reset"; sessionId: string; userId: string }
+  | { type: "ws-start"; title: string }
+  | { type: "ws-delta"; content: string }
+  | { type: "ws-end" }
+  | { type: "ws-toggle"; open: boolean };
 
 /* ─── Helpers ─── */
 function uid() {
@@ -47,6 +77,19 @@ function makeId(prefix: string) {
   return `${prefix}_${uid()}`;
 }
 
+function getStoredHistory(): HistorySession[] {
+  try {
+    const raw = localStorage.getItem("safeos.planning.history");
+    return raw ? JSON.parse(raw) : [];
+  } catch {
+    return [];
+  }
+}
+
+function saveStoredHistory(sessions: HistorySession[]) {
+  localStorage.setItem("safeos.planning.history", JSON.stringify(sessions));
+}
+
 function getSession() {
   try {
     const raw = localStorage.getItem("safeos.planning.session");
@@ -82,6 +125,18 @@ function reducer(state: State, action: Action): State {
       return { ...state, chatting: action.v };
     case "set-error":
       return { ...state, error: action.v };
+    case "set-history":
+      saveStoredHistory(action.sessions);
+      return { ...state, historySessions: action.sessions };
+    case "load-session":
+      return {
+        ...state,
+        sessionId: action.sessionId,
+        messages: action.messages,
+        reasoning: {},
+        chatting: false,
+        error: undefined,
+      };
     case "reset": {
       localStorage.setItem(
         "safeos.planning.session",
@@ -93,9 +148,31 @@ function reducer(state: State, action: Action): State {
         messages: [],
         reasoning: {},
         chatting: false,
+        historySessions: state.historySessions,
+        workspace: WORKSPACE_INIT,
         error: undefined,
       };
     }
+    case "ws-start":
+      return {
+        ...state,
+        workspace: { isOpen: true, title: action.title || "New Artifact", content: "", isGenerating: true },
+      };
+    case "ws-delta":
+      return {
+        ...state,
+        workspace: { ...state.workspace, content: state.workspace.content + action.content },
+      };
+    case "ws-end":
+      return {
+        ...state,
+        workspace: { ...state.workspace, isGenerating: false },
+      };
+    case "ws-toggle":
+      return {
+        ...state,
+        workspace: { ...state.workspace, isOpen: action.open },
+      };
     default:
       return state;
   }
@@ -175,11 +252,15 @@ export default function PlanningAgent() {
     messages: [],
     reasoning: {},
     chatting: false,
+    historySessions: getStoredHistory(),
+    workspace: WORKSPACE_INIT,
   });
 
   const [input, setInput] = useState("");
   const [files, setFiles] = useState<{ id: string; name: string }[]>([]);
   const [uploading, setUploading] = useState(false);
+  const [isHistoryOpen, setIsHistoryOpen] = useState(false);
+  const [loadingHistory, setLoadingHistory] = useState(false);
   const abortRef = useRef<AbortController | null>(null);
   const bottomRef = useRef<HTMLDivElement>(null);
 
@@ -191,6 +272,32 @@ export default function PlanningAgent() {
     return () => abortRef.current?.abort();
   }, []);
 
+  /* Load session */
+  const loadHistorySession = async (sessionId: string) => {
+    if (loadingHistory) return;
+    setLoadingHistory(true);
+    try {
+      const res = await fetch(`${API.planning}/history?session_id=${sessionId}&limit=100`);
+      if (!res.ok) throw new Error(`Load history failed: ${res.status}`);
+      const data = await res.json();
+      
+      const messages: ChatMessage[] = data.map((item: any) => ({
+        id: item.ID.toString(),
+        role: item.Role.toLowerCase(),
+        content: item.Content,
+        ts: new Date(item.CreatedAt).getTime(),
+        status: "sent"
+      }));
+
+      dispatch({ type: "load-session", sessionId, messages });
+      setIsHistoryOpen(false);
+    } catch (err) {
+      dispatch({ type: "set-error", v: `加载历史失败: ${(err as Error).message}` });
+    } finally {
+      setLoadingHistory(false);
+    }
+  };
+
   /* Send message */
   const send = useCallback(async () => {
     const text = input.trim();
@@ -220,7 +327,13 @@ export default function PlanningAgent() {
           file_ids: files.map((f) => f.id),
         },
         (evt) => {
-          if (evt.type === "final") {
+          if (evt.type === "workspace_start") {
+            dispatch({ type: "ws-start", title: evt.workspace_title || "New Artifact" });
+          } else if (evt.type === "workspace_delta") {
+            dispatch({ type: "ws-delta", content: evt.content });
+          } else if (evt.type === "workspace_end") {
+            dispatch({ type: "ws-end" });
+          } else if (evt.type === "final") {
             finalText += evt.content;
             dispatch({
               type: "update-msg",
@@ -279,21 +392,119 @@ export default function PlanningAgent() {
 
   /* Reset */
   const handleReset = () => {
+    if (state.messages.length > 0) {
+      const lastMsg = state.messages[state.messages.length - 1];
+      const summary = lastMsg.role === "assistant" 
+        ? lastMsg.content.slice(0, 50) + (lastMsg.content.length > 50 ? "..." : "")
+        : (state.messages[state.messages.length - 2]?.content.slice(0, 50) || "Empty session") + "...";
+      
+      const newHistorySession: HistorySession = {
+        id: uid(),
+        sessionId: state.sessionId,
+        summary: summary || "新会话",
+        ts: Date.now(),
+      };
+      
+      const updatedHistory = [newHistorySession, ...state.historySessions.filter(s => s.sessionId !== state.sessionId)];
+      dispatch({ type: "set-history", sessions: updatedHistory });
+    }
+
     abortRef.current?.abort();
     const fresh = { sessionId: makeId("sess"), userId: makeId("user") };
     dispatch({ type: "reset", ...fresh });
     setFiles([]);
   };
 
+  const wsHasContent = !state.workspace.isOpen && state.workspace.content.length > 0;
+
   return (
-    <div className="h-full">
+    <div className="h-full relative overflow-hidden flex">
+      {/* ─── Sidebar Overlay ─── */}
+      {isHistoryOpen && (
+        <div 
+          className="absolute inset-0 bg-black/20 z-40 transition-opacity duration-300"
+          onClick={() => setIsHistoryOpen(false)}
+        />
+      )}
+      
+      <div 
+        className={`absolute top-0 left-0 h-full w-1/4 bg-white border-r border-border z-50 transform transition-transform duration-300 ease-in-out shadow-xl ${
+          isHistoryOpen ? "translate-x-0" : "-translate-x-full"
+        }`}
+      >
+        <div className="p-6 h-full flex flex-col">
+          <div className="flex items-center justify-between mb-8">
+            <h3 className="text-lg font-bold">历史对话</h3>
+            <button 
+              onClick={() => setIsHistoryOpen(false)}
+              className="p-2 hover:bg-surface-muted rounded-full transition-colors"
+            >
+              <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="6 18L18 6M6 6l12 12" />
+              </svg>
+            </button>
+          </div>
+          <div className="flex-1 overflow-y-auto">
+            {state.historySessions.length === 0 ? (
+              <div className="text-center py-10 text-txt-muted text-sm italic">
+                暂无历史记录
+              </div>
+            ) : (
+              <div className="flex flex-col gap-3 py-2">
+                {state.historySessions.map((session) => (
+                  <div
+                    key={session.id}
+                    onClick={() => loadHistorySession(session.sessionId)}
+                    className={`p-4 rounded-xl border border-border cursor-pointer transition-all hover:bg-surface-muted hover:border-magenta group ${
+                      state.sessionId === session.sessionId ? 'bg-magenta/5 border-magenta ring-1 ring-magenta' : 'bg-white'
+                    }`}
+                  >
+                    <div className="flex justify-between items-start mb-2">
+                      <span className="text-[0.7rem] font-mono text-txt-muted truncate max-w-[120px]">
+                        ID: {session.sessionId.slice(0, 8)}...
+                      </span>
+                      <span className="text-[0.65rem] text-txt-muted">
+                        {new Date(session.ts).toLocaleDateString()}
+                      </span>
+                    </div>
+                    <p className="text-sm text-txt leading-snug line-clamp-2 group-hover:text-magenta transition-colors">
+                      {session.summary}
+                    </p>
+                  </div>
+                ))}
+              </div>
+            )}
+            {loadingHistory && (
+              <div className="absolute inset-0 bg-white/60 flex items-center justify-center z-[60]">
+                <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-magenta"></div>
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+
       {/* ─── Main Chat ─── */}
-      <div className="h-full flex flex-col min-w-0">
-        <div className="flex-1 overflow-y-auto px-[72px] py-8">
+      <div className={`h-full flex flex-col min-w-0 transition-all duration-300 ease-in-out ${
+        state.workspace.isOpen ? 'w-[35%] border-r border-border' : 'w-full'
+      }`}>
+        <div className={`flex-1 overflow-y-auto py-8 ${
+          state.workspace.isOpen ? 'px-4' : 'px-[72px]'
+        }`}>
+          {/* History Toggle Button */}
+          <button
+            onClick={() => setIsHistoryOpen(true)}
+            className="absolute top-6 left-6 p-2 bg-white border border-border rounded-lg shadow-sm hover:bg-surface-muted transition-colors z-30 group"
+            title="查看历史记录"
+          >
+            <svg className="w-5 h-5 text-txt-muted group-hover:text-magenta" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z" />
+            </svg>
+          </button>
+
           <div className="flex flex-col gap-6 w-full">
             {state.messages.length === 0 && (
               <div className="text-center py-20 card">
-                <h2 className="text-2xl font-extrabold mb-2">规划委员会代理</h2>
+                <h2 className={`font-extrabold mb-2 ${state.workspace.isOpen ? 'text-lg' : 'text-2xl'}`}>规划委员会代理</h2>
                 <p className="text-txt-muted text-sm">
                   提供一个高层 Epic，代理将从产品、架构与 RTE 视角进行规划。
                 </p>
@@ -303,7 +514,7 @@ export default function PlanningAgent() {
             {state.messages.map((msg) => (
               <div
                 key={msg.id}
-                className={`max-w-[78%] px-6 py-5 text-[0.95rem] leading-relaxed rounded-2xl shadow-[0_2px_14px_rgba(0,0,0,0.04)] ${
+                className={`${state.workspace.isOpen ? 'max-w-full' : 'max-w-[78%]'} px-6 py-5 text-[0.95rem] leading-relaxed rounded-2xl shadow-[0_2px_14px_rgba(0,0,0,0.04)] ${
                   msg.role === "user"
                     ? "self-end mr-1 bg-surface-muted text-txt border border-border whitespace-pre-wrap"
                     : "self-start bg-white border border-border border-l-4 border-l-magenta"
@@ -347,9 +558,24 @@ export default function PlanningAgent() {
           </div>
         </div>
 
+        {/* Workspace recall button */}
+        {wsHasContent && (
+          <div className={`${state.workspace.isOpen ? 'mx-4' : 'mx-[72px]'} mb-2`}>
+            <button
+              onClick={() => dispatch({ type: "ws-toggle", open: true })}
+              className="flex items-center gap-2 px-4 py-2 bg-magenta/5 border border-magenta/30 rounded-xl text-sm text-magenta hover:bg-magenta/10 transition-colors w-full justify-center"
+            >
+              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
+              </svg>
+              查看文档输出 — {state.workspace.title}
+            </button>
+          </div>
+        )}
+
         {/* Error */}
         {state.error && (
-          <div className="mx-[72px] mb-2 px-4 py-2 bg-red-50 text-red-700 text-sm flex justify-between items-center">
+          <div className={`${state.workspace.isOpen ? 'mx-4' : 'mx-[72px]'} mb-2 px-4 py-2 bg-red-50 text-red-700 text-sm flex justify-between items-center`}>
             {state.error}
             <button
               className="text-red-400 hover:text-red-600 font-bold"
@@ -361,7 +587,7 @@ export default function PlanningAgent() {
         )}
 
         {/* Input area */}
-        <div className="px-10 pb-6 pt-4 border-t border-border">
+        <div className={`pb-6 pt-4 border-t border-border ${state.workspace.isOpen ? 'px-4' : 'px-10'}`}>
           {/* File upload row */}
           <div className="flex items-center gap-3 mb-3 text-sm">
             <label className="btn-outline text-xs px-3 py-1.5 cursor-pointer">
@@ -399,6 +625,49 @@ export default function PlanningAgent() {
           </div>
         </div>
       </div>
+
+      {/* ─── Right Panel: Workspace ─── */}
+      {state.workspace.isOpen && (
+        <div className="w-[65%] h-full flex flex-col bg-white border-l border-border">
+          {/* Workspace Header */}
+          <div className="h-14 border-b border-border flex items-center px-6 justify-between bg-white shrink-0">
+            <h3 className="font-semibold text-txt flex items-center gap-2 truncate">
+              <svg className="w-5 h-5 text-magenta shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
+              </svg>
+              {state.workspace.title}
+              {state.workspace.isGenerating && (
+                <span className="text-sm text-magenta animate-pulse flex items-center gap-1 ml-2">
+                  <span className="w-1.5 h-1.5 rounded-full bg-magenta animate-pulse" />
+                  生成中...
+                </span>
+              )}
+            </h3>
+            <button
+              onClick={() => dispatch({ type: "ws-toggle", open: false })}
+              className="p-2 hover:bg-surface-muted rounded-full transition-colors shrink-0"
+              title="关闭面板"
+            >
+              <svg className="w-5 h-5 text-txt-muted hover:text-txt" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+              </svg>
+            </button>
+          </div>
+          {/* Workspace Content */}
+          <div className="flex-1 overflow-y-auto p-8">
+            <div className="prose prose-sm max-w-none prose-p:my-1 prose-pre:bg-gray-800 prose-pre:text-gray-100 prose-code:text-magenta prose-code:bg-magenta/10 prose-code:px-1 prose-code:rounded prose-li:my-0 prose-headings:text-txt">
+              <ReactMarkdown remarkPlugins={[remarkGfm]} rehypePlugins={[rehypeRaw]}>
+                {state.workspace.content}
+              </ReactMarkdown>
+            </div>
+            {state.workspace.isGenerating && !state.workspace.content && (
+              <div className="flex items-center justify-center py-20 text-txt-muted">
+                <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-magenta" />
+              </div>
+            )}
+          </div>
+        </div>
+      )}
     </div>
   );
 }

temp_output.txt

@@ -0,0 +1,198 @@
+    abortRef.current?.abort();
+    const fresh = { sessionId: makeId("sess"), userId: makeId("user") };
+    dispatch({ type: "reset", ...fresh });
+    setFiles([]);
+  };
+
+  return (
+    <div className="h-full relative overflow-hidden">
+      {/* ─── Sidebar Overlay ─── */}
+      {isHistoryOpen && (
+        <div 
+          className="absolute inset-0 bg-black/20 z-40 transition-opacity duration-300"
+          onClick={() => setIsHistoryOpen(false)}
+        />
+      )}
+      
+      <div 
+        className={`absolute top-0 left-0 h-full w-1/4 bg-white border-r border-border z-50 transform transition-transform duration-300 ease-in-out shadow-xl ${
+          isHistoryOpen ? "translate-x-0" : "-translate-x-full"
+        }`}
+      >
+        <div className="p-6 h-full flex flex-col">
+          <div className="flex items-center justify-between mb-8">
+            <h3 className="text-lg font-bold">历史对话</h3>
+            <button 
+              onClick={() => setIsHistoryOpen(false)}
+              className="p-2 hover:bg-surface-muted rounded-full transition-colors"
+            >
+              <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="6 18L18 6M6 6l12 12" />
+              </svg>
+            </button>
+          </div>
+          <div className="flex-1 overflow-y-auto">
+            {state.historySessions.length === 0 ? (
+              <div className="text-center py-10 text-txt-muted text-sm italic">
+                暂无历史记录
+              </div>
+            ) : (
+              <div className="flex flex-col gap-3 py-2">
+                {state.historySessions.map((session) => (
+                  <div
+                    key={session.id}
+                    onClick={() => loadHistorySession(session.sessionId)}
+                    className={`p-4 rounded-xl border border-border cursor-pointer transition-all hover:bg-surface-muted hover:border-magenta group ${
+                      state.sessionId === session.sessionId ? 'bg-magenta/5 border-magenta ring-1 ring-magenta' : 'bg-white'
+                    }`}
+                  >
+                    <div className="flex justify-between items-start mb-2">
+                      <span className="text-[0.7rem] font-mono text-txt-muted truncate max-w-[120px]">
+                        ID: {session.sessionId.slice(0, 8)}...
+                      </span>
+                      <span className="text-[0.65rem] text-txt-muted">
+                        {new Date(session.ts).toLocaleDateString()}
+                      </span>
+                    </div>
+                    <p className="text-sm text-txt leading-snug line-clamp-2 group-hover:text-magenta transition-colors">
+                      {session.summary}
+                    </p>
+                  </div>
+                ))}
+              </div>
+            )}
+            {loadingHistory && (
+              <div className="absolute inset-0 bg-white/60 flex items-center justify-center z-[60]">
+                <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-magenta"></div>
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+
+      {/* ─── Main Chat ─── */}
+      <div className="h-full flex flex-col min-w-0">
+        <div className="flex-1 overflow-y-auto px-[72px] py-8">
+          {/* History Toggle Button */}
+          <button
+            onClick={() => setIsHistoryOpen(true)}
+            className="absolute top-6 left-6 p-2 bg-white border border-border rounded-lg shadow-sm hover:bg-surface-muted transition-colors z-30 group"
+            title="查看历史记录"
+          >
+            <svg className="w-5 h-5 text-txt-muted group-hover:text-magenta" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z" />
+            </svg>
+          </button>
+
+          <div className="flex flex-col gap-6 w-full">
+            {state.messages.length === 0 && (
+              <div className="text-center py-20 card">
+                <h2 className="text-2xl font-extrabold mb-2">规划委员会代理</h2>
+                <p className="text-txt-muted text-sm">
+                  提供一个高层 Epic，代理将从产品、架构与 RTE 视角进行规划。
+                </p>
+              </div>
+            )}
+
+            {state.messages.map((msg) => (
+              <div
+                key={msg.id}
+                className={`max-w-[78%] px-6 py-5 text-[0.95rem] leading-relaxed rounded-2xl shadow-[0_2px_14px_rgba(0,0,0,0.04)] ${
+                  msg.role === "user"
+                    ? "self-end mr-1 bg-surface-muted text-txt border border-border whitespace-pre-wrap"
+                    : "self-start bg-white border border-border border-l-4 border-l-magenta"
+                }`}
+              >
+                {msg.role === "assistant" && (
+                  <span className="badge mb-3 block w-fit">系统 / 迭代闭环</span>
+                )}
+                {msg.role === "assistant" && state.reasoning[msg.id] && (
+                  <details 
+                    className="mb-4 bg-surface-muted/50 rounded-lg border border-border overflow-hidden"
+                    open={!msg.content}
+                  >
+                    <summary className="px-4 py-2 text-xs font-medium text-txt-muted cursor-pointer hover:bg-border/20 transition-colors list-none flex items-center gap-2">
+                       <span className={`w-1.5 h-1.5 rounded-full bg-magenta ${!msg.content ? 'animate-pulse' : ''}`}></span>
+                       查看思考过程
+                    </summary>
+                    <div className="px-4 py-3 bg-white/50 text-[0.8rem] font-mono whitespace-pre-wrap border-t border-border text-txt-muted">
+                      {state.reasoning[msg.id]}
+                    </div>
+                  </details>
+                )}
+                {msg.role === "assistant" ? (
+                  <div className="prose prose-sm max-w-none prose-p:my-0.5 prose-pre:bg-gray-800 prose-pre:text-gray-100 prose-code:text-magenta prose-code:bg-magenta/10 prose-code:px-1 prose-code:rounded prose-li:my-0">
+                    <ReactMarkdown
+                      remarkPlugins={[remarkGfm]}
+                      rehypePlugins={[rehypeRaw]}
+                    >
+                      {msg.content || (state.chatting ? "思考中..." : "")}
+                    </ReactMarkdown>
+                  </div>
+                ) : (
+                  msg.content || "Thinking..."
+                )}
+                {msg.status === "failed" && (
+                  <span className="text-red-500 text-xs block mt-2">发送失败</span>
+                )}
+              </div>
+            ))}
+            <div ref={bottomRef} />
+          </div>
+        </div>
+
+        {/* Error */}
+        {state.error && (
+          <div className="mx-[72px] mb-2 px-4 py-2 bg-red-50 text-red-700 text-sm flex justify-between items-center">
+            {state.error}
+            <button
+              className="text-red-400 hover:text-red-600 font-bold"
+              onClick={() => dispatch({ type: "set-error" })}
+            >
+              ✕
+            </button>
+          </div>
+        )}
+
+        {/* Input area */}
+        <div className="px-10 pb-6 pt-4 border-t border-border">
+          {/* File upload row */}
+          <div className="flex items-center gap-3 mb-3 text-sm">
+            <label className="btn-outline text-xs px-3 py-1.5 cursor-pointer">
+              {uploading ? "上传中..." : "附加文件"}
+              <input type="file" className="hidden" onChange={handleUpload} disabled={uploading} />
+            </label>
+            {files.map((f) => (
+              <span key={f.id} className="badge text-[0.7rem]">{f.name}</span>
+            ))}
+            <button
+              className="ml-auto text-xs text-txt-muted hover:text-magenta"
+              onClick={handleReset}
+            >
+              重置会话
+            </button>
+          </div>
+
+          <div className="flex gap-4 items-end">
+            <textarea
+              className="input-field flex-1 min-h-[88px] max-h-56 resize-y"
+              value={input}
+              onChange={(e) => setInput(e.target.value)}
+              onKeyDown={(e) => {
+                if (e.key === "Enter" && !e.shiftKey) {
+                  e.preventDefault();
+                  send();
+                }
+              }}
+              placeholder="描述你的 Epic 或提供指引..."
+              disabled={state.chatting}
+            />
+            <button className="btn-magenta" onClick={send} disabled={state.chatting}>
+              {state.chatting ? "规划中..." : "发送"}
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}