Live reasoning/tool frames were rendering correctly, but refreshing WebUI
replayed only role/content/media from `/api/sessions/:key/messages`.
Assistant `reasoning_content` / `thinking_blocks` and `tool_calls` were
already persisted by the backend and returned by the history endpoint, but
useSessionHistory discarded them.
Hydrate persisted assistant reasoning into `UIMessage.reasoning` and
reconstruct assistant tool calls as `kind: "trace"` rows so the replayed
thread keeps the same Thinking bubble and Used tools block as the live
stream. Tool result rows remain hidden from the conversation view to avoid
replaying raw tool output as chat text.
Adds regression coverage for both persisted reasoning and historical tool
call trace hydration.
Co-authored-by: Cursor <cursoragent@cursor.com>
Keep the new turn-end signal scoped to WebSocket clients, preserve pending tool-call state across trailing tool result rows, and drop the accidental npm lockfile from the Bun-based WebUI.
Co-authored-by: Cursor <cursoragent@cursor.com>
Add signed media URLs to live WebSocket replies and teach the WebUI to classify and render video attachments, so bot-sent videos can play inline in both live chats and session history.
Made-with: Cursor
