4.20.1 UI Dashboard Local storage total capacity is incorrect

### problem

**I have two KVM nodes, both using local storage:**

After adding multiple disks to the KVM node server, I repeatedly added and deleted local storage directories in the Primary Storage menu（The deletions resulted from poor directory layout planning）. Now, the UI Dashboard shows incorrect Storage Total values.

**However, I’ve verified that:**

The **Primary Storage Total** in the UI Dashboard is correct.
The **Local Storage Total** is incorrect.

How can I fix this discrepancy? can I manually correct the data in MySQL to resolve this issue?


### versions

CS version: 4.20.1
mgmt OS: rocky-9.6
kvm OS:rocky-9.6
qemu version: 9.1.0

### The steps to reproduce the bug

1. Cluster everythings be ok - only local storage capacity display is inaccurate in UI
2.
3.
...

### What to do about it?

_No response_

首先，在添加和删除本地存储目录后，使用所描述的 KVM 设置复现 Dashboard 差异，并比较 Local Storage Total 与 Primary Storage Total。报告未指明任何文件、测试或入口点，因此调查必须先定位计算并呈现这两个 Dashboard 值的代码。在所描述的存储更改后 Local Storage Total 仍保持准确，即视为完成。

由索引模型根据 Issue 内容生成。