iPad browser (vscode.dev): newlines not rendered in message display

Environment

• Platform: iPad (iPadOS)
• Browser: Safari and Chrome
• VS Code access: vscode.dev

Bug Description

When using Claude Code via vscode.dev on iPad, newline characters in user messages are not rendered as line breaks in the message display. The content is received correctly by the assistant (line breaks are preserved), but the UI displays the message as a single line.

Steps to Reproduce

1. Open vscode.dev on iPad (Safari or Chrome)
2. Open Claude Code panel
3. Type or paste a multi-line message
4. Send the message
5. Sent message appears as a single line in the conversation history

Expected Behavior

Line breaks should be visible in the message display (same as desktop VS Code behavior).

Additional Notes

• Desktop VS Code works correctly
• The assistant receives newlines correctly — display only issue
• white-space: pre-wrap appears to be set in the CSS but not effective on iPad via vscode.dev
• Occurs with both keyboard input and clipboard paste