[Bug] Environment variable with a $ bug on save

[Dysta]

Describe the bug

A clear and concise description of what the bug is.

There is a weird issue with environment variable set in CasaOS. If an environment contain a $, each save from the settings will multiply the $ time 2.

To Reproduce

Steps to reproduce the behavior:

1. Install an app from a docker-compose.yaml
2. Once the app is on the App panel, open the Settings
3. Setup an environment variable with a $ in it, for example MY_PASSWORD_APP=super$ecret!
4. Click save and wait for the app to be up again
5. Reopen the Settings panel
6. See that the $ in the input field have been multiplied

Expected behavior

A clear and concise description of what you expected to happen.
The $ shouldn't be duped

Screenshots

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Desktop (please complete the following information):

 - OS: Linux Ubuntu Server 24.04 LTS
 - Browser: Firefox
 - Version: Latest

System Time

Run timedatectl and share the output

               Local time: mer. 2025-10-01 08:50:50 UTC
           Universal time: mer. 2025-10-01 08:50:50 UTC
                 RTC time: mer. 2025-10-01 08:50:50
                Time zone: Etc/UTC (UTC, +0000)
System clock synchronized: yes
              NTP service: active
          RTC in local TZ: no

Logs

Run following command to collect corresponding logs:

sudo journalctl -xef -u casaos-gateway
sudo journalctl -xef -u casaos-user-service
sudo journalctl -xef -u casaos-local-storage
sudo journalctl -xef -u casaos-app-management
sudo journalctl -xef -u casaos.service

Additional context

Add any other context about the problem here.

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