tui: copy chat to system clipboard via reading mode + selection fixes
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Two ways to copy chat content out of the TUI now work:
1. In-app selection (Ctrl+C, OSC 52): _ChatItemView.render() now builds a
selection-aware Content from the rich renderable instead of letting Static
wrap a Panel into a non-selection-aware RichVisual — so the magenta
drag-select highlight actually renders and get_selection returns clean,
chrome-free text. rich Segment styles are converted to Textual Style
(Style.from_rich_style) so the selection_style merge doesn't crash, and
None segment styles are guarded. get_content_height is overridden to
compute auto-height straight from the rich renderable; without it the
width-keyed Content churned new Visual objects per width change and spread
the layout-settling cascade across refreshes, leaving a deferred scroll_end
at an intermediate max_scroll_y (chat no longer stuck to bottom). Theme
defines screen-selection-background/foreground so the highlight is visible.
2. Reading mode (Ctrl+R) for terminals without OSC 52 (e.g. GNOME Console,
TERM_PROGRAM=kgx, which silently ignores OSC 52 so Ctrl+C never reaches the
OS clipboard). Toggling the app's reading-mode class hides the chrome around
the chat (right status/todo column, input prompt, status bar, chat outer
border) and re-renders every message without its Panel borders via the
registry's new render_plain — so Shift+drag + Ctrl+Shift+C copies just the
conversation text to the system clipboard. ContentRenderer.render_plain
defaults to unwrapping Panel/Padding(Panel) to its body; assistant messages
and plan_ready override it to raw Text(content) so rich Markdown doesn't
re-wrap fenced code blocks in their own bordered Panels. ChatPanel tracks
reading mode and re-renders visible widgets in place (scroll preserved);
new streamed items pick up the mode on mount.
Help (/help) now lists keys and documents both copy paths.
Tests: render_plain parametrized across all item types, message renderer
plain tests, chat panel reading-mode toggle (borders off/on, scroll kept,
new items borderless), tui_app reading-mode chrome hide, plus the existing
selection suite. Full suite green (922 passed, 1 skipped).
Eugene Sukhodolskiy
committed
15 hours ago
