feat(api): 访谈人格/回复长度策略、口述归一、背景语气与输入净稿全链路

Chat 访谈
- 新增 persona 系统（default / warm_listener / curious_guide）与 background_voice 语气层
- 回复长度由 compute_reply_plan 统一决策（brief / standard / expanded），融合信息密度启发式
- 输入净稿（input_normalize）：编排层可选 rules/llm 归一用户口语后再喂模型与记忆检索
- 记忆证据注入：按用户话检索 memory evidence 并注入 prompt

Memoir 回忆录
- 口述归一（oral_normalize）：segment 原文保留，story 管线取派生净稿作叙事输入
- segment 入队批次门闸：累计字数 + 最长等待秒数，减少零碎提交
- fidelity_check / prompts / narrative_agent 微调
- Alembic 0005：清理跨章节 story 外键

Infra
- Dockerfile 加入 ffmpeg
- pyproject.toml 新增依赖并同步 uv.lock
- .env.example / .env.production 补全新配置项

Tests
- 新增 test_background_voice、test_chat_input_normalize、test_experience_regressions
- 扩展 test_interview_prompts、test_interview_reply_length、test_story_route_oral_invariant

Made-with: Cursor

api/tests/test_interview_prompts.py

@@ -0,0 +1,164 @@
+"""访谈提示词：追问触发与性格（Persona）拼接回归。"""
+
+from app.agents.chat.personas import normalize_interview_persona
+from app.agents.chat.prompts_conversation import (
+    get_guided_conversation_prompt,
+    get_opening_prompt,
+)
+
+
+def test_guided_prompt_contains_mandatory_followup_when_heuristic_matches():
+    p = get_guided_conversation_prompt(
+        current_stage="childhood",
+        empty_slots=["place", "people"],
+        filled_slots={},
+        user_message="厉害吧 那个女生叫娟娟",
+        conversation_turn=1,
+        same_topic_turns=1,
+        all_stages_coverage=None,
+        detected_user_stage="childhood",
+        user_profile_context="",
+        persona="default",
+    )
+    assert "什么时候追问" in p
+    assert "本轮判定" in p
+
+
+def test_guided_prompt_persona_curious_guide():
+    p = get_guided_conversation_prompt(
+        current_stage="education",
+        empty_slots=["school"],
+        filled_slots={},
+        user_message="还行吧",
+        conversation_turn=0,
+        same_topic_turns=0,
+        all_stages_coverage=None,
+        detected_user_stage="education",
+        user_profile_context="",
+        persona="curious_guide",
+    )
+    assert "好奇引导" in p
+
+
+def test_normalize_interview_persona_unknown_falls_back():
+    assert normalize_interview_persona("not_a_real_persona") == "default"
+    assert normalize_interview_persona("") == "default"
+
+
+def test_guided_prompt_contains_memoir_orientation():
+    p = get_guided_conversation_prompt(
+        current_stage="childhood",
+        empty_slots=["place"],
+        filled_slots={},
+        user_message="后来我就去上班了",
+        conversation_turn=0,
+        same_topic_turns=0,
+        all_stages_coverage=None,
+        detected_user_stage="childhood",
+        user_profile_context="",
+        persona="default",
+    )
+    assert "对话方向" in p
+    assert "人生故事" in p
+
+
+def test_guided_prompt_contains_memory_section_when_evidence():
+    p = get_guided_conversation_prompt(
+        current_stage="childhood",
+        empty_slots=["place"],
+        filled_slots={},
+        user_message="后来我就去上班了",
+        conversation_turn=0,
+        same_topic_turns=0,
+        all_stages_coverage=None,
+        detected_user_stage="childhood",
+        user_profile_context="",
+        persona="default",
+        memory_evidence_text="[摘要:rolling] 1990年生于上海。",
+    )
+    assert "相关记忆摘录" in p
+    assert "过往口述" in p
+    assert "1990年生于上海" in p
+
+
+def test_guided_prompt_chit_chat_hint():
+    p = get_guided_conversation_prompt(
+        current_stage="childhood",
+        empty_slots=["place"],
+        filled_slots={},
+        user_message="今天天气真好哈哈",
+        conversation_turn=0,
+        same_topic_turns=0,
+        all_stages_coverage=None,
+        detected_user_stage="childhood",
+        user_profile_context="",
+        persona="default",
+    )
+    assert "偏闲聊" in p
+
+
+def test_guided_prompt_reply_length_section_explicit_expanded():
+    p = get_guided_conversation_prompt(
+        current_stage="childhood",
+        empty_slots=["place"],
+        filled_slots={},
+        user_message="还行吧",
+        conversation_turn=0,
+        same_topic_turns=0,
+        all_stages_coverage=None,
+        detected_user_stage="childhood",
+        user_profile_context="",
+        persona="default",
+        reply_length_mode="expanded",
+    )
+    assert "本轮回复长度" in p
+    assert "当前档位：expanded" in p
+    assert "expanded" in p
+
+
+def test_guided_prompt_reply_length_explicit_brief():
+    """档位由 Agent 的 ReplyPlan 传入，prompt 不再自行推导。"""
+    p = get_guided_conversation_prompt(
+        current_stage="childhood",
+        empty_slots=["place"],
+        filled_slots={},
+        user_message="嗯",
+        conversation_turn=0,
+        same_topic_turns=0,
+        all_stages_coverage=None,
+        detected_user_stage="childhood",
+        user_profile_context="",
+        persona="default",
+        reply_length_mode="brief",
+    )
+    assert "当前档位：brief" in p
+
+
+def test_guided_prompt_background_voice_military() -> None:
+    p = get_guided_conversation_prompt(
+        current_stage="childhood",
+        empty_slots=["place"],
+        filled_slots={},
+        user_message="后来我就去上班了",
+        conversation_turn=0,
+        same_topic_turns=0,
+        all_stages_coverage=None,
+        detected_user_stage="childhood",
+        user_profile_context="",
+        persona="default",
+        background_voice="military",
+    )
+    assert "背景语气：军队语境" in p
+    assert "真诚承接" in p
+
+
+def test_opening_prompt_military_has_examples_note() -> None:
+    p = get_opening_prompt(
+        current_stage="childhood",
+        empty_slots_readable=["成长的地方"],
+        user_profile_context="",
+        persona="default",
+        background_voice="military",
+    )
+    assert "军队语境" in p
+    assert "（军队语境：简洁" in p or "军队语境" in p