fix(bash): kill entire process group on cancel

Sets Setpgid on bash commands and sends SIGTERM/SIGKILL to the negative pgid so backgrounded children are cleaned up on esc. Also splits the status bar onto multiple lines on narrow terminals when a spinner is active.

internal/agent/tools/bash.go

@@ -13,7 +13,6 @@ import (
 	"path/filepath"
 	"runtime"
 	"strings"
-	"syscall"
 	"time"
 
 	"github.com/patriceckhart/zot/internal/core"
@@ -69,6 +68,7 @@ func (t *BashTool) Execute(ctx context.Context, raw json.RawMessage, progress fu
 	cmd := newShellCmd(runCtx, a.Command)
 	cmd.Dir = cwd
 	cmd.Env = os.Environ()
+	setProcessGroup(cmd)
 
 	// Capture merged stdout+stderr with line-by-line streaming.
 	pr, pw := io.Pipe()
@@ -225,14 +225,3 @@ func newShellCmd(ctx context.Context, command string) *exec.Cmd {
 	}
 	return exec.CommandContext(ctx, "/bin/sh", "-c", command)
 }
-
-// killProcessGroup best-effort SIGTERM then SIGKILL.
-func killProcessGroup(cmd *exec.Cmd) {
-	if cmd.Process == nil {
-		return
-	}
-	_ = cmd.Process.Signal(syscall.SIGTERM)
-	time.AfterFunc(3*time.Second, func() {
-		_ = cmd.Process.Kill()
-	})
-}

internal/agent/tools/bash_unix.go

@@ -0,0 +1,29 @@
+//go:build !windows
+
+package tools
+
+import (
+	"os/exec"
+	"syscall"
+	"time"
+)
+
+// setProcessGroup puts the command in its own process group so
+// killProcessGroup can target the entire tree including background
+// children spawned with &.
+func setProcessGroup(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+}
+
+// killProcessGroup sends SIGTERM then SIGKILL to the entire process
+// group so backgrounded children (cmd &) are also cleaned up.
+func killProcessGroup(cmd *exec.Cmd) {
+	if cmd.Process == nil {
+		return
+	}
+	pgid := cmd.Process.Pid
+	_ = syscall.Kill(-pgid, syscall.SIGTERM)
+	time.AfterFunc(3*time.Second, func() {
+		_ = syscall.Kill(-pgid, syscall.SIGKILL)
+	})
+}

internal/agent/tools/bash_windows.go

@@ -0,0 +1,20 @@
+//go:build windows
+
+package tools
+
+import (
+	"os/exec"
+	"time"
+)
+
+func setProcessGroup(_ *exec.Cmd) {}
+
+func killProcessGroup(cmd *exec.Cmd) {
+	if cmd.Process == nil {
+		return
+	}
+	_ = cmd.Process.Kill()
+	time.AfterFunc(3*time.Second, func() {
+		_ = cmd.Process.Kill()
+	})
+}

internal/tui/view.go

@@ -1420,6 +1420,26 @@ func StatusBar(p StatusBarParams) []string {
 	}
 
 	primary := leftBuilder.String()
+
+	// On narrow terminals the single line wraps badly. If the visible
+	// width exceeds cols and we have a busy prefix, split: keep the
+	// busy prefix on line 1, put model+stats on line 2.
+	if p.Cols > 0 && p.BusyPrefix != "" && visibleWidth(primary) > p.Cols {
+		busyLine := pad + p.BusyPrefix
+		var infoBuilder strings.Builder
+		infoBuilder.WriteString(pad)
+		infoBuilder.WriteString(th.FG256(th.Muted, left))
+		if middle != "" {
+			infoBuilder.WriteString(pad)
+			infoBuilder.WriteString(th.FG256(th.Muted, middle))
+		}
+		lines := []string{busyLine, infoBuilder.String()}
+		if cwd != "" {
+			lines = append(lines, pad+th.FG256(th.Muted, cwd))
+		}
+		return lines
+	}
+
 	if cwd == "" {
 		return []string{primary}
 	}