Add setting to auto-expand tool call explanations in permission prompts

Feature Request

When Claude Code asks for permission to run a tool (e.g., a bash command), the explanation/details are collapsed by default and require pressing Ctrl+E to expand.

Request: Add a configuration setting (e.g., expandPermissionExplanations: true in settings.json) that makes tool call explanations always visible by default in permission prompts, without needing to press Ctrl+E each time.

Why: When reviewing whether to approve a tool call, the explanation provides important context. Having to manually expand it every time adds friction to the workflow. Users who always want to see the explanation before approving shouldn't need an extra keypress each time.

Proposed behavior:

• New setting in settings.json (e.g., "expandPermissionExplanations": true)
• When enabled, permission prompts show the full explanation by default
• Ctrl+E would still work as a toggle to collapse/expand