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/main.rs

@@ -118,6 +118,7 @@ fn run_single_process() -> Result<()> {
     enable_raw_mode()?;
     let mut stdout = io::stdout();
     execute!(stdout, EnterAlternateScreen)?;
+    execute!(stdout, crossterm::event::EnableBracketedPaste)?;
     let backend = CrosstermBackend::new(stdout);
     let mut terminal = Terminal::new(backend)?;
     terminal.clear()?;
@@ -125,6 +126,7 @@ fn run_single_process() -> Result<()> {
     let run_result = run_loop(&mut state, &mut terminal);
 
     let mut restore_stdout = io::stdout();
+    let _ = execute!(restore_stdout, crossterm::event::DisableBracketedPaste);
     let _ = execute!(restore_stdout, LeaveAlternateScreen);
     let _ = disable_raw_mode();
 
@@ -408,6 +410,12 @@ fn run_daemon() -> Result<()> {
                             }
                             apply_action(&mut state, Action::Tick);
                         }
+                        ClientRequest::Paste(text) => {
+                            state.input.buffer.insert_str(state.input.cursor, &text);
+                            state.input.cursor += text.len();
+                            state.dirty = true;
+                            apply_action(&mut state, Action::Tick);
+                        }
                         ClientRequest::Resize(w, h) => {
                             apply_action(&mut state, Action::Resize(w, h));
                             apply_action(&mut state, Action::Tick);
@@ -468,6 +476,7 @@ fn run_attach(session_id: &str) -> Result<()> {
     enable_raw_mode()?;
     let mut stdout = io::stdout();
     execute!(stdout, EnterAlternateScreen)?;
+    execute!(stdout, crossterm::event::EnableBracketedPaste)?;
     let backend = CrosstermBackend::new(stdout);
     let mut terminal = Terminal::new(backend)?;
     terminal.clear()?;
@@ -516,6 +525,9 @@ fn run_attach(session_id: &str) -> Result<()> {
                         }
                     }
                 }
+                Event::Paste(text) => {
+                    client.send(&ClientRequest::Paste(text))?;
+                }
                 Event::Resize(w, h) => {
                     client.send(&ClientRequest::Resize(w, h))?;
                 }
@@ -555,6 +567,7 @@ fn run_attach(session_id: &str) -> Result<()> {
         })?;
     }
 
+    let _ = execute!(io::stdout(), crossterm::event::DisableBracketedPaste);
     let _ = execute!(io::stdout(), LeaveAlternateScreen);
     let _ = disable_raw_mode();
 
@@ -578,8 +591,9 @@ fn run_loop(
     let result = run_loop_inner(state, terminal);
     if let Err(ref _e) = result {
         let _ = terminal.clear();
-        
+
         let _ = disable_raw_mode();
+        let _ = execute!(io::stdout(), crossterm::event::DisableBracketedPaste);
         let _ = execute!(io::stdout(), LeaveAlternateScreen);
     }
     result
@@ -625,6 +639,20 @@ fn run_loop_inner(
                         }
                     }
                 }
+                Event::Paste(text) => {
+                    // Insert pasted text as a single bulk operation instead of
+                    // character-by-character, avoiding O(n^2) String::insert()
+                    // and preventing stray newline/control-byte misinterpretation.
+                    if state.input.autocomplete_visible {
+                        state.input.close_autocomplete();
+                    }
+                    state.input.buffer.insert_str(state.input.cursor, &text);
+                    state.input.cursor += text.len();
+                    if state.input.buffer.starts_with('/') {
+                        state.input.open_autocomplete();
+                    }
+                    state.dirty = true;
+                }
                 Event::Resize(w, h) => {
                     apply_action(state, Action::Resize(w, h));
                 }