Remove the dead transcript export buttons

README.md

@@ -73,8 +73,6 @@ chats.](docs/images/command-palette.png)
 - **Keyboard-first navigation.** A command palette (Ctrl/Cmd+K) reaches new
   chat, settings, theme, model switching, and recent chats; `?` opens a
   shortcuts reference. The sidebar also supports searching chats by title.
-- **Transcript export.** Any conversation can be exported as Markdown or JSON
-  from the workspace header.
 - **Durable context.** Threads live in SQLite; permanent memories use atomic
   local JSON storage. Existing JSON chat history and Windows settings are read
   additively during migration without rewriting the legacy source.

frontend/src/features/chat/ChatPage.tsx

@@ -143,15 +143,6 @@ export function ChatPage({
 
   const currentChat = threadId !== null && chat?.id === threadId ? chat : null;
 
-  // Mirror the fully-loaded, currently-viewed chat into the global store so
-  // chrome outside ChatPage (the AppShell header's export control) can read
-  // it without prop-drilling. Cleared on unmount so a Settings round-trip
-  // doesn't leave a stale chat exported from the header.
-  useEffect(() => {
-    useChatStore.getState().setActiveChat(currentChat);
-    return () => useChatStore.getState().setActiveChat(null);
-  }, [currentChat]);
-
   useEffect(() => {
     if (isNearTranscriptEnd.current) {
       messageListRef.current?.scrollToBottom();

frontend/src/features/shell/AppShell.test.tsx

@@ -2,7 +2,6 @@ import { render, screen } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
 import { afterEach, describe, expect, it, vi } from "vitest";
 import type { ChatGroup, ChatSummary, ModelResponse } from "../../../../contracts/cortex-api";
-import { useChatStore } from "../../stores/useChatStore";
 import { AppShell } from "./AppShell";
 
 const CONNECTED = { success: true, status: "connected", message: "Connected." } satisfies NonNullable<ModelResponse["connection"]>;
@@ -117,20 +116,4 @@ describe("AppShell", () => {
 
     expect(screen.getByText("No chats match your search.")).toBeInTheDocument();
   });
-
-  it("shows an export control in the header once a full chat is the active chat in the store", () => {
-    useChatStore.getState().setActiveChat({
-      id: "chat-1",
-      title: "Quarterly planning",
-      timestamp: "2026-01-01T00:00:00Z",
-      revision: 1,
-      messages: [{ id: "m-1", role: "user", content: "hi" }],
-    });
-    const chat: ChatSummary = { id: "chat-1", title: "Quarterly planning", timestamp: "2026-01-01T00:00:00Z" };
-
-    renderShell({ chats: [chat], activeChatId: chat.id, onDeleteChat: vi.fn<(id: string) => Promise<void>>().mockResolvedValue(), onOpenSettings: vi.fn() });
-
-    expect(screen.getByRole("button", { name: "Export as Markdown" })).toBeInTheDocument();
-    expect(screen.getByRole("button", { name: "Export as JSON" })).toBeInTheDocument();
-  });
 });

frontend/src/features/shell/AppShell.tsx

@@ -3,11 +3,9 @@ import { Menu, Plus, Search, Settings, Trash2 } from "lucide-react";
 import type { ChatGroup, ChatSummary, CodeExecutionSourceResponse, ExecutionApprovalDecisionRequest, ExecutionTaskSummary, ModelResponse } from "../../../../contracts/cortex-api";
 import { displayChatTitle } from "../../lib/chatTitle";
 import { chatPath, parseAppRoute, useNavigate, usePathname } from "../../lib/navigation";
-import { useChatStore } from "../../stores/useChatStore";
 import { AlertDialog, Dialog, DialogContent } from "../../shared/ui/Dialog";
 import { ExecutionTaskTray } from "./ExecutionTaskTray";
 import { ChatLibrary } from "./ChatLibrary";
-import { ExportTranscriptMenu } from "../chat/ExportTranscriptMenu";
 import { NavigationLink } from "./NavigationLink";
 
 type Props = {
@@ -53,7 +51,6 @@ export function AppShell({
 }: Props) {
   const navigate = useNavigate();
   const pathname = usePathname();
-  const activeChat = useChatStore((state) => state.activeChat);
   const [sidebarVisible, setSidebarVisible] = useState(() => !isCompactWindow());
   const [renameTarget, setRenameTarget] = useState<ChatSummary | null>(null);
   const [deleteTarget, setDeleteTarget] = useState<ChatSummary | null>(null);
@@ -110,7 +107,6 @@ export function AppShell({
           </div>
         </div>
         <div className="window-actions">
-          {!isSettings && activeChat && <ExportTranscriptMenu chat={activeChat} />}
           <NavigationLink
             to="/settings"
             className={`window-control settings-control ${isSettings ? "window-control-active" : ""}`}

frontend/src/stores/useChatStore.test.ts

@@ -13,7 +13,7 @@ const idleGeneration = {
 
 describe("useChatStore", () => {
   beforeEach(() => {
-    useChatStore.setState({ chats: [], activeChat: null, generation: idleGeneration, generationOptionsByThread: {} });
+    useChatStore.setState({ chats: [], generation: idleGeneration, generationOptionsByThread: {} });
   });
 
   it("setChats accepts a plain array, mirroring useState", () => {

frontend/src/stores/useChatStore.ts

@@ -30,13 +30,11 @@ interface ChatStoreState {
   chats: ChatSummary[];
   /** User-created folders/projects, in their persisted display order. */
   groups: ChatGroup[];
-  activeChat: ChatResponse | null;
   generation: GenerationState;
   generationOptionsByThread: Record<string, GenerationOptionsOverride>;
 
   setChats: (next: ChatSummary[] | ((current: ChatSummary[]) => ChatSummary[])) => void;
   upsertChatSummary: (chat: ChatResponse) => void;
-  setActiveChat: (chat: ChatResponse | null) => void;
 
   setGroups: (next: ChatGroup[] | ((current: ChatGroup[]) => ChatGroup[])) => void;
   /** Replace one group in place, keeping its position in the list. */
@@ -78,7 +76,6 @@ const idleGeneration: GenerationState = {
 export const useChatStore = create<ChatStoreState>((set) => ({
   chats: [],
   groups: [],
-  activeChat: null,
   generation: idleGeneration,
   generationOptionsByThread: {},
 
@@ -99,7 +96,6 @@ export const useChatStore = create<ChatStoreState>((set) => ({
         ...state.chats.filter((item) => item.id !== chat.id),
       ],
     })),
-  setActiveChat: (chat) => set({ activeChat: chat }),
 
   setGroups: (next) =>
     set((state) => ({ groups: typeof next === "function" ? (next as (current: ChatGroup[]) => ChatGroup[])(state.groups) : next })),