M3b：世谱激活接入组装管线（关键词命中/常驻/预算/符文展开）与前端记忆治理页（候选箱/重忆确认/正影/删除/实录溯源）

backend/tests/test_xirang.py

@@ -255,3 +255,55 @@ async def test_recalled_memory_injected_into_prompt(client: AsyncClient) -> None
     prompt = requested["payload"]["request"]["messages"][-1]["content"]
     assert "【获准记忆（来源可查）】" in prompt
     _ = json  # 保留 json 引用供调试断言使用
+
+
+# ── M3b：世谱激活进入投影 ──────────────────────────────────────────────
+
+
+async def test_lorebook_activation_injected_into_prompt(client: AsyncClient) -> None:
+    tree_id, _q, answer_id, character_id = await _tree_with_answer(client, "世谱树")
+
+    # 为人物建世谱书 + 关键词条目 + 常驻条目
+    book = (
+        await client.post(
+            "/api/v1/lorebooks",
+            json={"name": "测试世谱", "character_id": character_id},
+        )
+    )
+    if book.status_code >= 400:  # 端点形态兼容：老 CRUD 可能要求别的字段
+        book = (await client.post("/api/v1/lorebooks", json={"name": "测试世谱"}))
+        assert book.status_code < 400, book.text
+    book_id = book.json()["id"]
+
+    keyed = (
+        await client.post(
+            f"/api/v1/lorebooks/{book_id}/entries",
+            json={"keys": ["星穹图书馆"], "content": "星穹图书馆只在午后开放"},
+        )
+    )
+    if keyed.status_code >= 400:  # 兼容批量/单条两种端点形态
+        keyed = await client.post(
+            f"/api/v1/lorebooks/{book_id}/entries",
+            json=[{"keys": ["星穹图书馆"], "content": "星穹图书馆只在午后开放"}],
+        )
+    assert keyed.status_code < 400, keyed.text
+
+    await client.post(f"/api/v1/trees/{tree_id}/adopt", json={"node_id": answer_id})
+    q2 = (
+        await client.post(
+            f"/api/v1/trees/{tree_id}/nodes", json={"content": "带我去星穹图书馆看看"}
+        )
+    ).json()
+    spawned = (await client.post(f"/api/v1/nodes/{q2['id']}/answers", json={})).json()
+    for _ in range(300):
+        if (await client.get(f"/api/v1/runs/{spawned['run_id']}")).json()["status"] in (
+            "completed",
+            "interrupted",
+        ):
+            break
+        await asyncio.sleep(0.02)
+    events = (await client.get(f"/api/v1/runs/{spawned['run_id']}/events")).json()
+    requested = next(e for e in events if e["type"] == "llm.requested")
+    prompt = requested["payload"]["request"]["messages"][-1]["content"]
+    assert "【世界认知（世谱命中）】" in prompt
+    assert "星穹图书馆只在午后开放" in prompt