chore(tests): update license and copyright headers

Updated SPDX-FileCopyrightText year range from "2024 - 2026" to "2026"
in notification server test files
Changed SPDX-License-Identifier from CC0-1.0 to GPL-3.0-or-later in
CMakeLists.txt to align with project licensing

Log: Update license headers and copyright year in notification tests

Influence:
1. Verify notification server tests still build correctly
2. Confirm license compatibility with project standards
3. Check copyright year consistency across test files

chore(tests): 更新许可证和版权头信息

将 SPDX-FileCopyrightText 年份范围从 "2024 - 2026" 更新为 "2026"
将 CMakeLists.txt 中的 SPDX-License-Identifier 从 CC0-1.0 更改为
GPL-3.0-or-later，以符合项目许可标准

Log: 更新通知测试中的许可证头和版权年份

Influence:
1. 验证通知服务器测试是否能正确构建
2. 确认许可证与项目标准兼容
3. 检查测试文件中版权年份的一致性

Author: heysion

tests/panels/notification/server/CMakeLists.txt

@@ -1,6 +1,6 @@
-# SPDX-FileCopyrightText: 2024 - 2026 UnionTech Software Technology Co., Ltd.
+# SPDX-FileCopyrightText: 2026 UnionTech Software Technology Co., Ltd.
 #
-# SPDX-License-Identifier: CC0-1.0
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 find_package(GTest REQUIRED)
 find_package(Qt${QT_VERSION_MAJOR} ${REQUIRED_QT_VERSION} REQUIRED COMPONENTS Core Test DBus)

tests/panels/notification/server/notifyserverapplet_test.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2024 - 2026 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later