fix: resolve MCP tool eye icon state and hide in chat context (#4993)

[daniel-lxs]

Description

Fixes #4993

This PR addresses two issues with the MCP tool eye icon:

1. The eye icon was showing the wrong state (showed eye when enabled, should show eye-closed)
2. The eye icon was appearing in chat context where it shouldn't be visible

Changes Made

• Added isInChatContext optional prop to McpToolRow component in webview-ui/src/components/mcp/McpToolRow.tsx
• Fixed the eye icon state logic to show codicon-eye-closed when enabled and codicon-eye when disabled
• Conditionally hide the eye button when isInChatContext is true
• Updated webview-ui/src/components/chat/McpExecution.tsx to pass isInChatContext={true} when rendering McpToolRow
• Added comprehensive tests to verify the new behavior

Testing

• All existing tests pass
• Added tests for the new isInChatContext prop
• Added tests to verify eye button is hidden in chat context
• Added tests to verify correct icon state based on enabledForPrompt
• Manual testing completed:
  • Eye icon no longer appears in chat when MCP tools are executed
  • Eye icon shows correct state in settings (eye-closed when enabled)

Verification of Acceptance Criteria

• In chat session: McpToolRow appears without the eye toggle button when Roo requests to use an MCP tool
• In MCP settings page: Eye toggle button is visible and functional
• Eye icon correctly toggles between eye and eye-closed based on enabledForPrompt state

Checklist

• Code follows project style guidelines
• Self-review completed
• Comments added for complex logic
• Documentation updated (if needed)
• No breaking changes
• Accessibility checked (keyboard navigation works)

Screenshots/Demo