Issue with CPU Model Detection on ARM Platforms

### I'm submitting a ...

bug report

### What is the current behavior?

lingmo-settings displays "unknown" for the CPU model name on certain ARM machines.

### If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem

Just run the lingmo-settings app and go to the about page on ARM machines like phytium pi

### What is the expected behavior?

It should display the name like "8 x Phytium FTC XXX"

### What is the motivation / use case for changing the behavior?

_No response_

### Please tell us about your environment:

Version: LingmoOS 2.0.2
System Architecture: Phytium E2000

### Other information

This occurs because ARM systems provide different information in `/proc/cpuinfo` compared to x86 systems. While x86 machines include explicit model and vendor names, ARM systems typically only provide CPU implementer and part numbers.

Start by running lingmo-settings on a Phytium ARM machine, opening the about page, and inspecting the CPU data available in /proc/cpuinfo. Compare the ARM fields with the existing detection behavior; done means the about page displays the processor name instead of "unknown" on the reported ARM system.

Written by the indexing model from the issue text.