[feat] support to select the assistant's output text with the mouse

[douglarek]

I don't know about TUI and I'm not sure if mouse operations can be performed on terminal text.

Note: I am using version 0.1.117.

[monotykamary]

FWIW, block mode tmux copying still works. Otherwise, the effort for this shouldn't be too big.

---

1. Add mouse drag selection handling in packages/tui/internal/tui/tui.go
2. Track selection state (start/end positions) in the TUI model
3. Modify message rendering to highlight selected text regions
4. Add clipboard integration for copy functionality

Low-Medium effort - the foundational work is already complete:

• ✅ Mouse support already implemented
• ✅ Text rendering system in place using glamour
• ✅ Event handling architecture established with Bubbletea

---

Approximately 150-300 lines of Go code:

• Mouse selection logic: ~100 lines in tui.go
• Selection state management: ~50 lines
• Visual highlighting: ~50-100 lines (modify existing render functions)
• Clipboard integration: ~50 lines

[cravenceiling]

I think this is a duplicate of #212. You can select text by holding shift.

[monotykamary]

you definitely can select text that way, but you also copy everything else in the UI:

in tmux, you can use block copy and have a special pipe to parse it; this would probably be the goal if possible with bubbletea:

---

edit: actually this lazy pipe works with tmux

bind-key -T copy-mode-vi Y send-keys -X copy-pipe "tmux show-buffer | claude -p 'Clean up this text by removing trailing whitespace, connecting lines appropriately, and making it readable as a single coherent block of text. Return only the cleaned text with no additional commentary: ' | pbcopy"

if we're super lazy, we could just hijack the copy and clean up the text through a cheap LLM

[orlandokj]

I think it would be nice to have a copy option in the message, can be a command like /copy or maybe we can navigate the selected message through some keybind and then hit another keybind to copy it to clipboard.

[adamdotdevin]

taking the convo to #212