06648d91bb
Add a header button to the AI agent chat window that copies the active conversation to the clipboard as Markdown, including the request internals already persisted client-side — tool calls with their input/output, per-message token usage, and finish/error info. No new network call and no server/DB change: it serializes the already-loaded persisted message rows. - New util chat-markdown.ts (renamed from export-chat.ts): pure buildChatMarkdown() serializer reusing the tool-parts helpers so tool labels match the on-screen labels; fence() escapes embedded code fences. - ai-chat-window.tsx: Copy button (shown only for a saved chat with loaded rows) using the project useClipboard hook; toggles a check icon on success and shows the standard "Copied" notification. Drag is unaffected (startDrag ignores button clicks). - en-US: add "Copy chat" key, drop the obsolete "Export chat".