Two issues fixed:
1. agent.controller.ts — on the FIRST task of each session, write title+voiceMode
into session.metadata so the client can display a meaningful conversation title:
- Text sessions: metadata.title = first 40 chars of user prompt
- Voice sessions: metadata.title = '' + metadata.voiceMode = true
(Flutter renders these as '语音对话 M/D HH:mm')
titleSet flag prevents overwriting the title on subsequent turns of the same session.
2. session.controller.ts — listSessions() now returns a DTO instead of the raw entity.
systemPrompt is an internal engine instruction and is explicitly excluded from the
response. The client receives { id, status, engineType, metadata, createdAt, updatedAt }.
hailin
6ca8aab243