-**负例**:错误凭据 → `✗ Could not save storage settings.` + `submit: s3 credentials rejected: The Access Key Id you provided does not exist`(`CheckS3Access` 预检先于一切写入);**零副作用**(无 Secret、两 toml sha 不变);`esc` 返回编辑时已填值保留(密钥掩码)✓
-**正例**:修正凭据 → ~10s working → `✓ Object storage configured.` → Enter → 状态屏 `storage s3://felis-wizard-uploads · http://10.211.55.6:9000` ✓