Fix not clickable outside of stream

[Kitenite]

Description

What is the purpose of this pull request?

• New feature
• Documentation update
• Bug fix
• Refactor
• Release
• Other

[greptile-apps]

PR Summary

This PR addresses UI interaction issues by fixing button behavior in bash command execution and improving clickable areas in the message stream interface.

• Added vertical margin (my-2) to loading indicator in /apps/studio/src/routes/editor/EditPanel/ChatTab/ChatMessages/StreamMessage.tsx to prevent blocked click areas
• Fixed button disable logic in /apps/studio/src/routes/editor/EditPanel/ChatTab/CodeChangeDisplay/BashCodeDisplay.tsx to properly prevent multiple command executions during streaming
• Corrected the isStream condition to disable buttons while streaming instead of when not streaming

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