Describe the bug
I have recognized that there is an issue with adding new lines in the mcp dialog environment variables field.

Pressing enter does add a line break:

Typing the first char add the equal sign (=):

Small notice, editing the mcp server fixes the issue with the environment variables field.

To Reproduce
Steps to reproduce the behavior:

1. Open Settings -> Agents -> Claude -> MCP Servers
2. Add MCP Server
3. Fill Environment Variables (KEY=value, one per line)

Expected behavior
Pressing enter should add a line break and the equal sign shouldn't appear without typing or pasting values.

Desktop (please complete the following information):

• OS: MacOS
• Browser Chrome