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，在新增和刪除本機儲存目錄後，使用所描述的 KVM 設定重現 Dashboard 差異，並比較 Local Storage Total 與 Primary Storage Total。報告未指明任何檔案、測試或進入點，因此調查必須先找出計算並呈現這兩個 Dashboard 值的程式碼。在所描述的儲存變更後 Local Storage Total 仍保持準確，即表示完成。

由索引模型根據 Issue 內容生成。