Switching tab reset name

**Describe the bug**
Hello !

Quiet the same as : https://github.com/0xfurai/peekaping/issues/151
But this time it's about switching tab
When you switch your tab (i'm using Firefox) custom field get reseted

I'm trying to add a notification chanel, i need to switch tab to let's say write the "SMTP Host", when i switch tab it goes back to "exemple.com"

**Database**
- sqlite

**To Reproduce**
Steps to reproduce the behavior:

1. Go to Notification channels
2. Add a new one
3. Click on SMTP Host
4. Write "Google.com"
5. Switch to another Tab in your web browser
6. Go back to Peekaping
7. It get reseted to "Exemple.com"
**Expected behavior**
Keep what i wrote ! :)

**Desktop (please complete the following information):**
- OS: Windows 11
- Browser Firefox
- Version 142

The issue is in the frontend form handling for notification channels. Look at the JavaScript code that manages the SMTP Host input field, likely in a React/Vue component or vanilla JS file for the notification settings. The bug is that tab switching triggers a reset; investigate browser tab visibility events or form state management. Check for any 'blur' or 'focus' event listeners that might be resetting the value. Reproduce locally by following the steps, then inspect the network and console to see if a re-fetch happens on tab return.

索引モデルが issue の本文から書いたものです。