gui: the toolbar in the order things happen, and an About block

The Plan bar now reads left to right as the work does: which
directory, how it should be listed, what of it, where it is on disk -
then Scan, and only then what to do with what came back. Scan carries
the theme's accent, being the button that starts everything.

Settings ends with About: the program and the version it was built
as, what it is in a sentence, the licence, and who to write to. The
text is model.About so it is tested; ui.Version is stamped by main.

leak-check knows krino's own contact address, so the address check
stays useful without a per-clone setting.

1 files changed, 43 insertions, 0 deletions

diff --git a/gui/internal/model/about_test.go b/gui/internal/model/about_test.go
new file mode 100644
index 0000000..00a6718
--- /dev/null
+++ b/gui/internal/model/about_test.go
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package model_test
+
+import (
+	"strings"
+	"testing"
+
+	"krino/gui/internal/model"
+)
+
+// TestAboutSaysWhatItIs: the About block names the program, the version it
+// was built as, the licence, who wrote it and how to reach them.
+func TestAboutSaysWhatItIs(t *testing.T) {
+	lines := model.About("0.0.12")
+	if len(lines) == 0 {
+		t.Fatal("About returned nothing")
+	}
+	whole := strings.Join(lines, "\n")
+	for _, want := range []string{
+		"krino",
+		"0.0.12",
+		"GPL-3.0-or-later",
+		"Lukasz Kasprzak",
+		"contact@labunix.xyz",
+	} {
+		if !strings.Contains(whole, want) {
+			t.Errorf("About does not mention %q:\n%s", want, whole)
+		}
+	}
+	if !strings.HasPrefix(lines[0], "krino ") {
+		t.Errorf("the first line should name the program and version, got %q", lines[0])
+	}
+}
+
+// TestAboutWithoutAVersion: a plain `go build` leaves "dev", and About says
+// so rather than printing an empty version.
+func TestAboutWithoutAVersion(t *testing.T) {
+	lines := model.About("")
+	if !strings.Contains(lines[0], "dev") {
+		t.Errorf("an unstamped build should read as dev, got %q", lines[0])
+	}
+}