fix(bonfire): reroute only the owning console's lines to a live view

- the registered view keeps the console that started it; Println, Printf
  and status lines go above it only from that console, other consoles
  write to their own writers (bonfire.PrintAbove still reaches any view)
- runLive claims the single live slot by check and set under liveMu and
  reports when it could not, so the widget prints plain lines
- unregister, finish and wait run deferred, so a panic in work leaves no
  registration behind and still propagates (WR-02)

modules/bonfire/helpers.go

@@ -149,7 +149,7 @@ func Process(ctx context.Context, out Output, operation string, items []string,
 	}
 	if c, ok := out.(*console); ok && c.live() && len(items) > 0 {
 		var errs []error
-		_ = runLive(ctx, c.out, c, newProcessModel(c.palette, operation, items), func(send func(tea.Msg)) error {
+		started, _ := runLive(ctx, c.out, c, newProcessModel(c.palette, operation, items), func(send func(tea.Msg)) error {
 			for i, item := range items {
 				if err := ctx.Err(); err != nil {
 					errs = append(errs, err)
@@ -165,7 +165,9 @@ func Process(ctx context.Context, out Output, operation string, items []string,
 			}
 			return nil
 		})
-		return errors.Join(errs...)
+		if started {
+			return errors.Join(errs...)
+		}
 	}
 	var errs []error
 	for _, item := range items {