feat(chat): 接入全局知识库上下文

tests/test_chat_knowledge_context.py

@@ -0,0 +1,59 @@
+import pytest
+
+from review_agent.models import KnowledgeBaseDocument
+from review_agent.services import build_knowledge_context
+
+
+pytestmark = pytest.mark.django_db
+
+
+def test_build_knowledge_context_ignores_irrelevant_rag_chunks(monkeypatch):
+    monkeypatch.setattr(
+        "review_agent.services.search_knowledge_base",
+        lambda query, n_results=5: {
+            "query": query,
+            "results": [
+                {
+                    "source": "附件 4 体外诊断试剂注册申报资料要求及说明.doc",
+                    "text": "预期用途应明确产品用于检测的分析物和功能。",
+                    "score": 7.636,
+                    "metadata": {"source_type": "regulatory_document"},
+                }
+            ],
+            "error_message": "",
+        },
+    )
+
+    context = build_knowledge_context("孙之烨是谁")
+
+    assert context == ""
+
+
+def test_build_knowledge_context_uses_full_document_when_name_matches(settings, tmp_path, monkeypatch, django_user_model):
+    settings.MEDIA_ROOT = tmp_path
+    user = django_user_model.objects.create_user(username="owner", password="pass")
+    document_path = tmp_path / "resume.txt"
+    document_path.write_text(
+        "孙之烨，负责审核智能体项目。\n完整经历：曾组织技术分享并带队参加竞赛。",
+        encoding="utf-8",
+    )
+    KnowledgeBaseDocument.objects.create(
+        user=user,
+        display_name="孙之烨简历",
+        original_name="孙之烨-260510.txt",
+        storage_path=str(document_path),
+        file_size=document_path.stat().st_size,
+        status=KnowledgeBaseDocument.Status.ACTIVE,
+        is_active=True,
+        indexed_chunk_count=2,
+    )
+    monkeypatch.setattr(
+        "review_agent.services.search_knowledge_base",
+        lambda query, n_results=5: {"query": query, "results": [], "error_message": ""},
+    )
+
+    context = build_knowledge_context("孙之烨是谁")
+
+    assert "全文材料" in context
+    assert "来源：用户知识库/孙之烨-260510.txt" in context
+    assert "完整经历：曾组织技术分享并带队参加竞赛" in context