feat: e on the status pane edits the config, as in lazygit

Instead of a global E: e on the status pane opens the config, shown
in its footer as "e edit config".

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/ui/app/repo_test.go

@@ -350,8 +350,9 @@ func TestEditConfig(t *testing.T) {
 	d := newDriverOpts(t, Options{ConfigFiles: []string{path}, OpenURL: func(u string) error { opened = append(opened, u); return nil }})
 	d.m.getenv = func(string) string { return "" }
 
-	// No editor: the system's default app, on a config made for it.
-	d.keys("E")
+	// e on the status pane. No editor: the system's default app, on a
+	// config made for it.
+	d.keys("0", "e")
 	if !slices.Equal(opened, []string{path}) {
 		t.Errorf("opened %q", opened)
 	}
@@ -382,3 +383,12 @@ func TestEditConfig(t *testing.T) {
 		t.Errorf("flash %q", d.m.flash.text)
 	}
 }
+
+func TestStatusFooterEditsConfig(t *testing.T) {
+	t.Parallel()
+	d := newDriver(t)
+	d.keys("0")
+	if !strings.Contains(d.screen(), "e edit config") {
+		t.Errorf("no edit config in the footer:\n%s", d.screen())
+	}
+}