完善测试：pytest 套件（路由器/工具循环/WS全链路/投递/PG集成）

- tests/conftest.py: 内存版 FakeDB 复刻 db.py 全部签名，绕过 lifespan 的测试应用
- test_chat_flow.py: WebSocket 全链路（回声/路由信号落库/档案/慢信/连续天数）
- test_delivery.py: 事件/每日任务/关怀投递（在线与离线）、天气工具城市链、system prompt 注入
- test_router.py: 小模型路由清洗（去重/丢过去事件/非法作息/500优雅降级/无模型空判定）
- test_tool_loop.py: 原生工具调用循环（喂结果/超轮次强制收尾/坏参数）
- test_pure.py: 纯逻辑（连续天数/哈希槽位/时间间隔/模板/向量）
- test_db_pg.py: PG 集成测试，无 PG_DSN 自动跳过，配好即真实跑库
- 旧散装脚本移除；tools_live/ws_client/tui_smoke 保留为手动脚本

tests/test_db_pg.py

@@ -0,0 +1,143 @@
+"""PostgreSQL 集成测试：真实跑一遍 db.py 的每一层。
+
+未设置 PG_DSN 时整组跳过；设置后需要库已存在（表会自动建）。
+"""
+import os
+import time
+import uuid
+
+import pytest
+
+import app.db as db
+from app.connector import hash_embed
+
+pytestmark = pytest.mark.skipif(
+    not os.getenv("PG_DSN", "").strip(),
+    reason="未配置 PG_DSN，跳过 PG 集成测试")
+
+
+@pytest.fixture(scope="module")
+async def conn():
+    await db.init(os.environ["PG_DSN"].strip())
+    yield
+    await db.close()
+
+
+def session():
+    return "test-" + uuid.uuid4().hex[:8]
+
+
+async def test_history_roundtrip(conn):
+    s = session()
+    await db.add_message(s, "user", "第一条")
+    await db.add_message(s, "assistant", "第二条")
+    await db.add_message(s, "user", "第三条")
+    rows = await db.get_history(s)
+    assert [(r["role"], r["content"]) for r in rows] == [
+        ("user", "第一条"), ("assistant", "第二条"), ("user", "第三条")]
+    rows = await db.get_history(s, limit=2)
+    assert len(rows) == 2 and rows[0]["content"] == "第二条"
+
+
+async def test_memories_and_semantic_search(conn):
+    s = session()
+    facts = ["用户喜欢打篮球", "用户住在杭州", "用户叫小明"]
+    vecs = [hash_embed(f) for f in facts]
+    await db.add_memories(s, facts, vecs)
+    rows = await db.get_memories(s)
+    assert [r["text"] for r in rows] == facts
+    hits = await db.search_memories(s, hash_embed("打篮球真开心"), k=2)
+    assert hits and hits[0]["text"] == "用户喜欢打篮球"
+    # 整组替换（夜间巩固用）
+    new_facts = ["用户叫小明", "用户在杭州上学"]
+    await db.replace_memories(s, new_facts, [hash_embed(f) for f in new_facts])
+    rows = await db.get_memories(s)
+    assert [r["text"] for r in rows] == new_facts
+
+
+async def test_routine_upsert_averaging(conn):
+    s = session()
+    await db.upsert_routine(s, "到校", 7 * 60 + 40, "inferred")
+    await db.upsert_routine(s, "到校", 7 * 60 + 50, "inferred")
+    rows = await db.get_routines(s)
+    assert len(rows) == 1
+    assert rows[0]["minute"] == (7 * 60 + 40 + 7 * 60 + 50) // 2
+    assert rows[0]["evidence"] == 2
+    # explicit 直接定时间
+    await db.upsert_routine(s, "到校", 7 * 60 + 30, "explicit")
+    rows = await db.get_routines(s)
+    assert rows[0]["minute"] == 7 * 60 + 30 and rows[0]["kind"] == "explicit"
+
+
+async def test_events_one_shot_and_daily(conn):
+    s = session()
+    now = time.time()
+    eid = await db.add_event(s, "reminder", now - 10, "喝水", "once", 0)
+    did = await db.add_event(s, "reminder", now + 3600, "吃药", "daily", 22 * 60)
+
+    due = await db.due_events(s)
+    assert [e["id"] for e in due] == [eid]
+    today = time.strftime("%Y-%m-%d")
+    daily = await db.due_daily_events(today, 22 * 60 + 1, window=10)
+    assert [e["id"] for e in daily] == [did]
+    await db.mark_event_fired(did, today)
+    assert await db.due_daily_events(today, 22 * 60 + 1, window=10) == []
+
+    rows = await db.today_events(s, now - 60)
+    assert {e["id"] for e in rows} == {eid, did}
+    await db.mark_event_done(eid)
+    assert await db.due_events(s) == []
+
+
+async def test_care_and_letters(conn):
+    s = session()
+    cid = await db.add_care(s, "emotion", "心情不好", time.time() - 5)
+    due = await db.due_care(time.time())
+    assert [c["id"] for c in due] == [cid]
+    await db.mark_care_done(cid)
+    assert await db.due_care(time.time()) == []
+
+    lid = await db.add_letter(s, "给未来", time.time() - 5)
+    assert [l["id"] for l in await db.due_letters()] == [lid]
+    await db.mark_letter_delivered(lid)
+    assert await db.pending_letters(s) == []
+
+
+async def test_meta_lore_diary_digest(conn):
+    s = session()
+    await db.set_meta(s, "streak", "3")
+    assert await db.get_meta(s, "streak") == "3"
+    assert await db.get_meta(s, "nope", "d") == "d"
+
+    await db.upsert_lore(s, "诞生", "v1")
+    await db.upsert_lore(s, "诞生", "v2")  # 同话题=更正
+    lore = await db.get_lore(s)
+    assert lore == [{"topic": "诞生", "body": "v2"}]
+
+    day = time.strftime("%Y-%m-%d")
+    await db.add_diary(s, day, "今天…")
+    assert (await db.get_diary(s))[0]["body"] == "今天…"
+
+    await db.add_digest(s, day, "回顾")
+    assert await db.get_digest(s, day) == "回顾"
+    assert await db.count_digests(s) == 1
+
+
+async def test_stats_and_day_counts(conn):
+    s = session()
+    await db.add_message(s, "user", "计数")
+    await db.add_memories(s, ["用户是测试"], None)
+    stats = await db.get_stats(s)
+    assert stats["messages"] == 1 and stats["memories"] == 1
+    assert stats["first_ts"] and stats["db_bytes"] > 0
+    counts = await db.day_counts(s, time.time() - 60)
+    assert counts["msgs"] == 1 and counts["mem"] == 1
+
+
+async def test_memory_from_days_ago(conn):
+    s = session()
+    await db.add_message(s, "user", "半个月前的话")
+    rows = await db.memory_from_days_ago(s, 15, time.time())
+    assert rows == []  # 刚插入的不在 15 天前
+    rows = await db.memory_from_days_ago(s, 0, time.time() + 86400)
+    assert any(r["content"] == "半个月前的话" for r in rows)