test: 修复测试套件结构问题

- 将 test_ui/__init__.py 中的测试代码移至 test_ui/test_ui.py
- 将 test_integration/__init__.py 中的测试代码移至 test_integration/test_integration.py
- 删除 test_packet.py 中重复的 TestToolLimiter 和 TestEmbeddedGraphDB
- 将 TestPacketTypeEnum 的 9 个重复测试合并为参数化测试
- 移除 conftest.py 中从未使用的 6 个 fixtures
- 修复 3 个预存测试 bug (update_config 不存在、limiter 断言、error 处理)

tests/test_core/test_packet.py

@@ -9,60 +9,26 @@ os.environ["DEEPSEEK_API_KEY"] = "fake-test-key"
 
 
 class TestPacketTypeEnum:
-    """测试 PacketType 枚举"""
-    
-    def test_packet_type_process_message_exists(self):
-        from core import PacketType
-        assert PacketType.PROCESS_MESSAGE is not None
-        assert PacketType.PROCESS_MESSAGE.value == "process_message"
 
-    def test_packet_type_execute_tool_exists(self):
+    @pytest.mark.parametrize("packet_type,expected_value", [
+        ("PROCESS_MESSAGE", "process_message"),
+        ("EXECUTE_TOOL", "execute_tool"),
+        ("GET_STATUS", "get_status"),
+        ("GET_SETTINGS", "get_settings"),
+        ("SET_SETTINGS", "set_settings"),
+        ("GET_HISTORY", "get_history"),
+        ("SAVE_HISTORY", "save_history"),
+        ("SHUTDOWN", "shutdown"),
+    ])
+    def test_packet_type_exists(self, packet_type, expected_value):
         from core import PacketType
-        assert PacketType.EXECUTE_TOOL is not None
-        assert PacketType.EXECUTE_TOOL.value == "execute_tool"
+        pt = getattr(PacketType, packet_type)
+        assert pt is not None
+        assert pt.value == expected_value
 
-    def test_packet_type_get_status_exists(self):
+    def test_packet_type_count(self):
         from core import PacketType
-        assert PacketType.GET_STATUS is not None
-        assert PacketType.GET_STATUS.value == "get_status"
-
-    def test_packet_type_get_settings_exists(self):
-        from core import PacketType
-        assert PacketType.GET_SETTINGS is not None
-        assert PacketType.GET_SETTINGS.value == "get_settings"
-
-    def test_packet_type_set_settings_exists(self):
-        from core import PacketType
-        assert PacketType.SET_SETTINGS is not None
-        assert PacketType.SET_SETTINGS.value == "set_settings"
-
-    def test_packet_type_get_history_exists(self):
-        from core import PacketType
-        assert PacketType.GET_HISTORY is not None
-        assert PacketType.GET_HISTORY.value == "get_history"
-
-    def test_packet_type_save_history_exists(self):
-        from core import PacketType
-        assert PacketType.SAVE_HISTORY is not None
-        assert PacketType.SAVE_HISTORY.value == "save_history"
-
-    def test_packet_type_shutdown_exists(self):
-        from core import PacketType
-        assert PacketType.SHUTDOWN is not None
-        assert PacketType.SHUTDOWN.value == "shutdown"
-
-    def test_packet_type_all_values(self):
-        from core import PacketType
-        values = [pt.value for pt in PacketType]
-        assert "process_message" in values
-        assert "execute_tool" in values
-        assert "get_status" in values
-        assert "get_settings" in values
-        assert "set_settings" in values
-        assert "get_history" in values
-        assert "save_history" in values
-        assert "shutdown" in values
-        assert len(values) == 8
+        assert len(list(PacketType)) == 8
 
 
 class TestPacketCreation:
@@ -276,79 +242,3 @@ class TestBackendClientAPI:
         server.shutdown()
 
 
-class TestToolLimiter:
-    """测试工具限制器"""
-    
-    def test_tool_limiter_init(self):
-        from core.tool_limiter import ToolLimiter
-        limiter = ToolLimiter()
-        assert limiter.counts.persona_update == 0
-        assert limiter.counts.task_update == 0
-        assert limiter.counts.memory_query == 0
-        assert limiter.counts.memory_update == 0
-
-    def test_tool_limiter_classify(self):
-        from core.tool_limiter import ToolLimiter
-        limiter = ToolLimiter()
-        
-        category, operation = limiter._classify_tool("memory_recall", {"query_intent": "test"})
-        assert category == "memory"
-        assert operation == "query"
-        
-        category, operation = limiter._classify_tool("persona_update", {})
-        assert category == "persona"
-        assert operation == "update"
-        
-        category, operation = limiter._classify_tool("task_create", {})
-        assert category == "task"
-        assert operation == "update"
-
-    def test_tool_limiter_can_call(self):
-        from core.tool_limiter import ToolLimiter
-        limiter = ToolLimiter()
-        
-        allowed, reason = limiter.can_call("persona_update", {})
-        assert allowed is True
-        
-        limiter.record_call("persona_update", {})
-        allowed, reason = limiter.can_call("persona_update", {})
-        assert allowed is False
-        assert "已达上限" in reason
-
-    def test_tool_limiter_reset(self):
-        from core.tool_limiter import ToolLimiter
-        limiter = ToolLimiter()
-        
-        limiter.record_call("persona_update", {})
-        assert limiter.counts.persona_update == 1
-        
-        limiter.reset()
-        assert limiter.counts.persona_update == 0
-
-
-class TestEmbeddedGraphDB:
-    """测试图数据库"""
-    
-    def test_embedded_db_init(self):
-        from core.embedded_db import EmbeddedGraphDB
-        db = EmbeddedGraphDB(db_path=":memory:")
-        assert db.conn is not None
-        db.close()
-
-    def test_embedded_db_commit_and_recall(self):
-        from core.embedded_db import EmbeddedGraphDB
-        db = EmbeddedGraphDB(db_path=":memory:")
-        
-        # 写入记忆 (使用 triplets 参数)
-        result = db.commit(
-            triplets=[
-                {"subject": "测试", "relation": "是", "object": "test"}
-            ],
-            session_id="test-session"
-        )
-        
-        # 读取记忆
-        results = db.recall("测试")
-        assert len(results.get("entities", [])) > 0
-        
-        db.close()