Standard fenrir backgrounding and -d flags restored.

internal/app/app_test.go

@@ -772,3 +772,45 @@ func TestScreenWatcherFailureReleasesKeyboards(t *testing.T) {
 		t.Fatal("screen watcher failure left keyboards open")
 	}
 }
+
+func TestStartupReadinessFollowsInitialScreenAndInput(t *testing.T) {
+	for _, failure := range []string{"", "screen", "input", "notification"} {
+		t.Run(failure, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+			problem := errors.New("startup fixture failure")
+			source := &fakeSource{snapshot: screen.Snapshot{Terminal: 1}}
+			keys := &fakeKeys{}
+			read, polled, ready := false, false, false
+			source.afterRead = func() { read = true }
+			if failure == "screen" {
+				source.readErr = problem
+			}
+			keys.poll = func(bool, func(input.Decision)) error {
+				polled = true
+				if failure == "input" {
+					return problem
+				}
+				return nil
+			}
+			opts := RunOptions{Settings: config.Defaults(), Ready: func() error {
+				if !read || !polled {
+					t.Fatal("readiness preceded initial screen or input")
+				}
+				ready = true
+				cancel()
+				if failure == "notification" {
+					return problem
+				}
+				return nil
+			}}
+			err := run(ctx, source, keys, &fakeVoice{}, nil, opts)
+			if failure != "" && !errors.Is(err, problem) || failure == "" && err != nil {
+				t.Fatal("unexpected startup result", err)
+			}
+			if ready != (failure == "" || failure == "notification") || !keys.closed {
+				t.Fatal("startup failure reported readiness or left input open", ready, keys.closed)
+			}
+		})
+	}
+}