fix/various fixes

api/app/features/conversation/session_history.py

@@ -0,0 +1,63 @@
+"""
+会话 transcript 与 Redis 历史条目的纯映射（无 I/O）。
+
+仅由 ConversationService 使用：对齐 ChatOrchestrator 经 save_message 写入 Redis 的字段形状，
+不属于 Agent 层 —— 多 Agent 模块只消费已就绪的 history，不负责从 DB 重建。
+"""
+
+from __future__ import annotations
+
+from datetime import timezone
+from typing import Any, Dict, List
+
+from app.features.conversation.models import Segment
+
+
+def _voice_session_id_from_audio_url(audio_url: str | None) -> str | None:
+    if not audio_url:
+        return None
+    prefix = "audio-segment:"
+    if not audio_url.startswith(prefix):
+        return None
+    payload = audio_url[len(prefix) :]
+    voice_session_id_raw, sep, _ = payload.rpartition(":")
+    if sep and voice_session_id_raw:
+        return voice_session_id_raw
+    return None
+
+
+def _segment_timestamp_iso(seg: Segment) -> str | None:
+    if not seg.created_at:
+        return None
+    dt = seg.created_at
+    if dt.tzinfo is None:
+        dt = dt.replace(tzinfo=timezone.utc)
+    return dt.isoformat()
+
+
+def segments_to_redis_history(segments: List[Segment]) -> List[Dict[str, Any]]:
+    """Segment 行 → Redis conversation history 项（与 ChatOrchestrator 写入格式一致）。"""
+    history: List[Dict[str, Any]] = []
+    for seg in segments:
+        ts = _segment_timestamp_iso(seg)
+        is_voice = bool(seg.audio_url)
+        human: Dict[str, Any] = {
+            "role": "human",
+            "content": seg.transcript_text or "",
+            "messageType": "audio" if is_voice else "text",
+            "timestamp": ts,
+        }
+        vsid = _voice_session_id_from_audio_url(seg.audio_url)
+        if vsid:
+            human["voiceSessionId"] = vsid
+        history.append(human)
+        if seg.agent_response and seg.agent_response.strip():
+            history.append(
+                {
+                    "role": "ai",
+                    "content": seg.agent_response.strip(),
+                    "messageType": "text",
+                    "timestamp": ts,
+                }
+            )
+    return history