feat(protocol): add Paste request type for bracketed-paste events

feat(engine): summarize agent completion progress in UI notifications

feat(main): enable and disable bracketed paste support in terminal

fix(app_config): store API key from file as fallback for Claude provider

refactor(workflow): remove unnecessary card separator in workflow panel

src/view/workflow.rs

@@ -146,9 +146,6 @@ pub fn draw_workflow_panel(frame: &mut Frame, area: Rect, state: &crate::app::st
                     Span::styled(prog.clone(), Style::default().fg(Theme::TEXT_DIM).add_modifier(Modifier::ITALIC)),
                 ]));
             }
-
-            // Card separator
-            card_lines.push(Line::from(Span::raw("")));
         }
 
         let list = Paragraph::new(card_lines);