"feat/tui-copy-toast-and-drag-auto-scroll"

peri-tui/locales/en/main.ftl

@@ -96,7 +96,7 @@ statusbar-permission-accept-edit = Accept Edit
 statusbar-permission-auto = Auto Mode
 statusbar-permission-bypass = Bypass
 statusbar-permission-cycle-hint = (Shift+Tab to cycle)
-statusbar-copied =  { $count } chars copied
+statusbar-copied = Copied { $count } chars to clipboard
 statusbar-no-agent = None
 statusbar-bg-indicator = [BG: { $count }]
 statusbar-retrying = Retry { $attempt }/{ $max } ({ $delay }s): { $error }

peri-tui/src/event/mod.rs

@@ -718,14 +718,31 @@ async fn handle_event(app: &mut App, ev: Event) -> Result<Option<Action>> {
                 }
                 if app.session_mgr.current_mut().ui.text_selection.dragging {
                     if let Some(area) = app.session_mgr.current_mut().ui.messages_area {
-                        let visual_row = usize::from(mouse.row.saturating_sub(area.y))
-                            + app.session_mgr.current_mut().ui.scroll_offset;
+                        // Auto-scroll when dragging past viewport boundary
+                        // Speed scales with distance from viewport edge (1-5 lines per event)
+                        let ui = &mut app.session_mgr.current_mut().ui;
+                        let area_bottom = area.y + area.height;
+                        if mouse.row >= area_bottom {
+                            let distance = (mouse.row - area_bottom) as u32;
+                            let step = (1 + distance / 2).min(5) as usize;
+                            let max_scroll = ui.scrollbar_max_offset;
+                            let min_scroll = ui.scrollbar_min_offset.min(max_scroll);
+                            let next = ui.scroll_offset.saturating_add(step).min(max_scroll);
+                            ui.scroll_offset = next.max(min_scroll);
+                            ui.scroll_follow = next >= max_scroll;
+                        } else if mouse.row < area.y {
+                            let distance = (area.y - mouse.row) as u32;
+                            let step = (1 + distance / 2).min(5) as usize;
+                            let max_scroll = ui.scrollbar_max_offset;
+                            let min_scroll = ui.scrollbar_min_offset.min(max_scroll);
+                            ui.scroll_offset = ui.scroll_offset.saturating_sub(step).max(min_scroll);
+                            ui.scroll_follow = false;
+                        }
+                        let scroll_offset = ui.scroll_offset;
+                        let visual_row =
+                            usize::from(mouse.row.saturating_sub(area.y)) + scroll_offset;
                         let visual_col = mouse.column.saturating_sub(area.x);
-                        app.session_mgr
-                            .current_mut()
-                            .ui
-                            .text_selection
-                            .update_drag(visual_row, visual_col);
+                        ui.text_selection.update_drag(visual_row, visual_col);
                     }
                 }
                 // Textarea area: extend textarea selection

peri-tui/src/ui/main_ui/mod.rs

@@ -106,6 +106,42 @@ fn render_session_column(f: &mut Frame, app: &mut App, area: Rect) {
         .split(area);
 
     message_area::render_messages(f, app, chunks[0], chunks[1]);
+
+    // 复制成功浮动提示：消息区右下角，紧贴输入框上方（对齐 Claude Code）
+    if let Some(until) = app.session_mgr.current().ui.copy_message_until {
+        if std::time::Instant::now() < until {
+            let lc = &app.services.lc;
+            let count = app.session_mgr.current().ui.copy_char_count;
+            let text = format!(
+                " {} ",
+                lc.tr_args("statusbar-copied", &[("count".into(), (count as i64).into())])
+            );
+            let text_width = unicode_width::UnicodeWidthStr::width(text.as_str());
+            let msg_area = chunks[1];
+            if msg_area.height > 0 && text_width > 0 {
+                // scrollbar 占据最右 1 列，toast 需左移避让
+                let has_scrollbar = {
+                    let cache = app.session_mgr.current().messages.render_cache.read();
+                    cache.total_lines > msg_area.height as usize && msg_area.width > 1
+                };
+                let scrollbar_col: u16 = if has_scrollbar { 1 } else { 0 };
+                let y = msg_area.y + msg_area.height - 1;
+                let avail_width = msg_area.width.saturating_sub(scrollbar_col);
+                let x = (msg_area.x + avail_width).saturating_sub(text_width as u16);
+                let label_area = Rect {
+                    x,
+                    y,
+                    width: text_width.min(avail_width as usize) as u16,
+                    height: 1,
+                };
+                f.render_widget(
+                    Paragraph::new(text).style(Style::default().fg(Color::Rgb(182, 186, 233))),
+                    label_area,
+                );
+            }
+        }
+    }
+
     attachment::render_attachment_bar(f, app, chunks[2]);
 
     // 底部展开区

peri-tui/src/ui/main_ui/status_bar.rs

@@ -268,26 +268,7 @@ fn render_third_row(f: &mut Frame, app: &App, area: Rect) {
         left_spans.push(Span::styled(hint, Style::default().fg(theme::DIM)));
     }
 
-    // 瞬时状态
-    // 复制成功提示
-    if let Some(until) = app.session_mgr.current().ui.copy_message_until {
-        if std::time::Instant::now() < until {
-            if has_content {
-                left_spans.push(Span::styled(" · ", Style::default().fg(theme::MUTED)));
-            }
-            let count = app.session_mgr.current().ui.copy_char_count;
-            left_spans.push(Span::styled(
-                format!(
-                    " {}",
-                    lc.tr_args(
-                        "statusbar-copied",
-                        &[("count".into(), (count as i64).into()),]
-                    )
-                ),
-                Style::default().fg(theme::MUTED),
-            ));
-        }
-    }
+    // 瞬时状态（复制提示已移至消息区右下角浮动显示）
 
     // 后台任务指示器
     if !app.session_mgr.current().background_agents.is_empty() {