name a live opencode row from the prompt until opencode names it

Same shape as the claude side, which has never shown a live row without a name.

OpenCode titles a session from the conversation and does it well, but asynchronously — so
for the whole time a turn is RUNNING, which is exactly what /chat/live shows, the session is
still called "New session - <ISO>". Its own title wins the moment it exists; until then the
row falls back to the prompt that started the session.

Kept per sessionKey, first turn only, so it stays the name of the conversation rather than
following whatever was asked most recently. Dropped with the session id it sits beside.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/servers/api/chat/websocket.ts

@@ -10,6 +10,7 @@ import type {
   UserSession,
 } from './types';
 import { sessionManager } from './session-manager';
+import { rememberOpenCodePrompt } from './opencode/state';
 import { sendClaudeCodeStreaming } from '@@/channels/send-claude-code';
 import { sendOpenCodeStreaming } from '@@/channels/send-opencode';
 import { ensureGeneralChatSessionsCwd } from './claude-sessions';
@@ -407,6 +408,9 @@ async function handleOpenCodeChat(
 
   const cwd = await resolveChatCwd(msg, email, userId);
 
+  // Names this session in the Live panel until OpenCode gets round to titling it. First turn only.
+  rememberOpenCodePrompt(sessionId, msg.displayText || msg.prompt);
+
   const groupSlug = msg.groupSlug || null;
 
   const session = sessionManager.getOrCreate(sessionId, email, cwd, model, groupSlug, msg.context, msg.contextId);