[Bug] Fullscreen TUI mouse capture prevents standard clipboard selection without Shift-drag

Bug Description
Title: Docs inaccurate — fullscreen TUI mouse mode captures mouse; Shift-drag required to copy Environment: Claude Code terminal CLI, fullscreen renderer ("tui": "fullscreen"), GNOME Terminal on Ubuntu (Linux 6.8). Issue: code.claude.com/docs/en/terminal-config.md describes fullscreen rendering as adding "mouse support for scrolling and selection" and implies the terminal's native clipboard is unaffected. In practice the fullscreen buffer captures the mouse: - Plain click-drag highlights blue = Claude's in-app selection; does not reach the system clipboard. - Shift-click-drag highlights white = terminal's native selection; this is copyable (Ctrl+Shift+C). So copying text out of the CLI requires Shift-drag — standard TUI mouse-capture behavior, but the docs don't mention it. Also (minor): Mouse interaction in fullscreen is richer than the docs state — single-select menu options can be clicked to choose them; however multi-select checkboxes cannot be toggled by mouse (Space still required). Docs say "scrolling and selection only," which undersells the first point and omits the second. Suggested fix: Document that fullscreen captures the mouse, that Shift-drag is needed for clipboard copy, and clarify the single-select-click vs multi-select-toggle distinction.

Environment Info

• Platform: linux
• Terminal: gnome-terminal
• Version: 2.1.195
• Feedback ID: d75e986c-0f5e-4a87-8843-3c8e91b63769

Errors

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