🧐[Question] 无法安装cer证书，转成crt证书安装后软件检测不到

### 🧐 问题描述(Description)

提示说要安装证书保存到本地后为cer证书
但是安全设置从存储设备中安装证书提示**没有可以使用的证书**
转换成crt证书后可以安装，但是返回软件还是提示要安装证书
总之就是安装不了证书，没法加速，试了一中午了

### 🚑 其他信息(Other Information)

- 程序版本(Program Version):安卓版Alpha v2.7.2
- 系统版本号(OS Version): ColorOSV12.1；Android12，3月更新
- 是否为应用商店版本(Whether it is a Store version): No

Start by reproducing certificate installation on Android 12 with ColorOS V12.1 using Alpha v2.7.2, following the reported .cer and .crt steps. Trace the Android certificate setup and detection flow; the issue is done when a supported certificate installs successfully and the app recognizes it for acceleration.

Written by the indexing model from the issue text.