I have to re-input the key when I re-open NEXTCHAT every time .

### Bug Description

Every time when I open the client, it always raises:
```
检测到无效 API Key，请前往[设置](tauri://localhost/#/settings)页检查 API Key 是否配置正确
```
Then I have to re-input the key. But when I re-input the key, it still requires me to re-input it next time when I open it.
It BOTHERS!!

### Steps to Reproduce

re-opening it is enough.

### Expected Behavior

I wanna it can remember my key.

### Screenshots

_No response_

### Deployment Method

- [ ] Docker
- [ ] Vercel
- [ ] Server

### Desktop OS

macOS

### Desktop Browser

_No response_

### Desktop Browser Version

_No response_

### Smartphone Device

_No response_

### Smartphone OS

_No response_

### Smartphone Browser

_No response_

### Smartphone Browser Version

_No response_

### Additional Logs

_No response_