Claude Code TUI overrides terminal clipboard shortcuts and right-click without opt-out

Description

Claude Code's TUI captures keyboard and mouse events (Ctrl+C, Ctrl+V, right-click) that override the terminal emulator's native clipboard operations. Users must use Shift+Ctrl+C / Shift+Ctrl+V as a workaround, which is unintuitive and undiscoverable.

Steps to Reproduce

1. Open a terminal emulator (e.g., Terminator, iTerm2, Kitty)
2. SSH into a remote host
3. Start claude
4. Try to copy text with Ctrl+C or Cmd+C (macOS)
5. Try to paste with Ctrl+V or Cmd+V
6. Try right-clicking for context menu

Expected: Terminal's native clipboard copy/paste and right-click context menu work normally.
Actual: Claude Code captures these inputs. Copy/paste does nothing, right-click is intercepted.

Impact

• Breaks muscle memory for terminal users
• Especially painful over SSH where clipboard integration is already fragile
• The Shift modifier workaround is not documented in the UI
• Users with accessibility needs or custom keybindings are affected
• No way to opt out or configure this behavior

Suggested Fix

• Respect the terminal's native clipboard shortcuts by default
• Provide a setting to control whether Claude Code captures clipboard keys (e.g., captureClipboardKeys: false in settings.json)
• At minimum, document the Shift+Ctrl+C/V workaround prominently in the TUI

Environment

• Claude Code: latest (CLI)
• Terminal: Terminator (Linux), also reproduced in other terminal emulators
• OS: Ubuntu 24.04 (remote via SSH from macOS)
• Keyboard: Standard US layout

Additional Context

This was discovered while working in an SSH session where the user expected standard terminal copy/paste behavior. The override feels like Claude Code is "taking over" system settings without permission.