产品上线验收清单

根据本次实际改动列出用户可观察的行为变化，并为每项设计最短验收步骤和预期结果。覆盖正常路径、相关边界、失败恢复与回滚触发条件。区分已验证和待验证，不宣称未执行的测试通过。最后按风险安排验收顺序。

输入材料：
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目标与约束：
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只依据输入回答。缺少关键信息时明确标记未知，必要时先提问。输出应可直接用于当前任务。

List user-visible behavior changes and define concise acceptance steps with expected outcomes for each. Cover the happy path, relevant boundaries, failure recovery and rollback triggers. Distinguish verified from pending checks and never claim an unrun test passed. Order acceptance work by risk.

Input material:
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Goal and constraints:
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Base the response on the input. Mark missing information as unknown and ask essential questions when needed. Make the output directly usable for this task.