fix(tui): preserve native terminal selection

docs/GUIDE.md

@@ -213,7 +213,8 @@ Chat and transcript shortcuts:
 | `Ctrl+Home` / `Ctrl+End` | Jumps to the top or bottom of the transcript | Useful after long tool output. |
 | `Esc` | Backs out of the current action | It un-sends a just-submitted turn before any reply, cancels a running turn, or clears non-empty input. |
 | Double `Esc` on an empty idle composer | Opens the rewind picker | Same entry point as `/rewind`. |
-| `Ctrl+C` / `Meta+C` / `Super+C` | Copies an active transcript selection | Without a selection it cancels a running turn, clears non-empty input, or quits on a second empty-composer press. |
+| Terminal native selection | Copies transcript text | Reasonix does not enable mouse reporting by default, so terminal selection/copy remains available. |
+| `Ctrl+C` | Cancels, clears, or quits | Cancels a running turn, clears non-empty input, or quits on a second empty-composer press. |
 | `Ctrl+D` | Quits the TUI | Immediate quit. |
 | `Ctrl+V`, `Ctrl+Shift+V`, `Meta+V`, or `Super+V` | Pastes clipboard content | The CLI tries an image first, then falls back to text or file references. |
 | `/paste-image` | Pastes a clipboard image | Use it when you want image-only paste or the terminal handles text paste itself. |

docs/GUIDE.zh-CN.md

@@ -194,7 +194,8 @@ Goal、由 `todo_write` 工具驱动的实时 Todo 面板，以及已配置 prov
 | `Ctrl+Home` / `Ctrl+End` | 跳到 transcript 顶部或底部 | 长工具输出后很有用。 |
 | `Esc` | 退出当前最具体的动作 | 可在无回复前撤回刚提交的 turn、取消运行中的 turn，或清空非空输入。 |
 | 空闲且输入为空时双击 `Esc` | 打开 rewind 选择器 | 和 `/rewind` 是同一个入口。 |
-| `Ctrl+C` / `Meta+C` / `Super+C` | 复制当前 transcript 选区 | 没有选区时用于取消运行中 turn、清空非空输入；空输入下连按两次退出。 |
+| 终端原生选择 | 复制 transcript 文本 | Reasonix 默认不启用鼠标报告，因此终端自己的选择/复制仍可使用。 |
+| `Ctrl+C` | 取消、清空或退出 | 取消运行中的 turn、清空非空输入；空输入下连按两次退出。 |
 | `Ctrl+D` | 退出 TUI | 立即退出。 |
 | `Ctrl+V`、`Ctrl+Shift+V`、`Meta+V` 或 `Super+V` | 粘贴剪贴板内容 | CLI 会先尝试图片，再回退到文本或文件引用。 |
 | `/paste-image` | 粘贴剪贴板图片 | 适合只想贴图片，或终端应用自己接管文本粘贴的场景。 |

internal/cli/chat_tui.go

@@ -38,9 +38,9 @@ import (
 )
 
 // chatTUI is a bubbletea Model that normally owns the terminal with an
-// alt-screen transcript viewport. Termux is the exception: enabling mouse mode
-// prevents taps from raising the soft keyboard, so it stays in the normal buffer
-// and commits finalized output to native scrollback via tea.Println.
+// alt-screen transcript viewport. Termux is the exception: it stays in the
+// normal buffer and commits finalized output to native scrollback via
+// tea.Println so taps can still focus the soft keyboard.
 type chatTUI struct {
 	ctrl    control.SessionAPI
 	label   string
@@ -48,8 +48,8 @@ type chatTUI struct {
 
 	width  int
 	height int
-	// nativeScrollback keeps Termux out of alt-screen/mouse mode so taps still
-	// focus the textarea and raise the soft keyboard.
+	// nativeScrollback keeps Termux out of alt-screen mode so taps still focus
+	// the textarea and raise the soft keyboard.
 	nativeScrollback bool
 
 	input   textarea.Model
@@ -1375,8 +1375,7 @@ func (m chatTUI) update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 // finalize drains the committed-line queue and batches the turn's commands. In
 // the default alt-screen path the queue is already mirrored in m.transcript. In
-// Termux we cannot enable mouse mode without breaking soft-keyboard focus, so
-// finalized lines are also emitted into the terminal's native scrollback.
+// Termux finalized lines are also emitted into the terminal's native scrollback.
 func finalize(m chatTUI, cmds []tea.Cmd) tea.Cmd {
 	if m.nativeScrollback && len(*m.pendingCommit) > 0 {
 		out := strings.TrimRight(clampWidth(strings.Join(*m.pendingCommit, "\n"), m.width), "\n")
@@ -2399,7 +2398,6 @@ func (m chatTUI) View() tea.View {
 	}
 	v := tea.NewView(mainArea + "\n" + strings.Join(parts, "\n"))
 	v.AltScreen = true
-	v.MouseMode = tea.MouseModeCellMotion // wheel scrolls the transcript
 	// Anchor the real terminal cursor at the textarea's insertion point only when
 	// the composer is visible. input.Cursor() is relative to the textarea; offset
 	// by the viewport height + rows above + the box's top border row (+1 column

internal/cli/chat_tui_test.go

@@ -1392,8 +1392,8 @@ func TestQueueIndicatorHiddenWhenIdle(t *testing.T) {
 }
 
 // TestViewAltScreenFillsHeight proves the switch to alt-screen: View requests
-// the alt buffer + mouse, and the frame is exactly the terminal height (the
-// transcript viewport pads to fill above the pinned bottom region).
+// the alt buffer without mouse reporting, and the frame is exactly the terminal
+// height (the transcript viewport pads to fill above the pinned bottom region).
 func TestViewAltScreenFillsHeight(t *testing.T) {
 	ctrl := control.New(control.Options{})
 	m := newChatTUI(ctrl, "", make(chan event.Event, 1), 80)
@@ -1404,8 +1404,8 @@ func TestViewAltScreenFillsHeight(t *testing.T) {
 	if !v.AltScreen {
 		t.Error("View must request alt-screen so resize repaints the whole grid")
 	}
-	if v.MouseMode != tea.MouseModeCellMotion {
-		t.Error("View must enable mouse so the wheel scrolls the transcript")
+	if v.MouseMode != tea.MouseModeNone {
+		t.Error("View must leave terminal mouse selection available by default")
 	}
 	if lines := strings.Count(v.Content, "\n") + 1; lines != 24 {
 		t.Errorf("alt-screen frame = %d lines, want 24 (full terminal height)", lines)