Launcher: a grid of icons, with badges; the list stays as a Setting

The Launcher shows the Apps as a 4 x 3 grid of 32 x 32 icons, the
selected one's name under it (issue #9). The icons are the website's
own, doubled, and two drawn the same way for SSH and the Shell; they
are PNGs in assets/icons, turned into arrays by scripts/make_icons.py,
which CI checks. The selected tile is the website's: dark blue on cyan,
with notched corners.

- GridModel (lib/ui, host-tested) holds the selection and the scrolling.
- App::badge(): a dot on the tile for unread IRC messages, a Track
  recording, a Capture running, an SSH session open.
- Settings > Launcher: Grid or List.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0162FokPdvY2KsS4NBfwyWPk

test/test_grid_model/test_grid_model.cpp

@@ -0,0 +1,97 @@
+#include <unity.h>
+
+#include "grid_model.h"
+
+using namespace roro;
+
+void setUp() {}
+void tearDown() {}
+
+void test_empty_grid_has_no_selection() {
+    GridModel g(4, 3);
+    TEST_ASSERT_EQUAL(-1, g.selected());
+    g.right();
+    g.down();
+    TEST_ASSERT_EQUAL(-1, g.selected());
+    TEST_ASSERT_EQUAL(0, g.rows());
+}
+
+void test_left_and_right_go_through_every_item() {
+    GridModel g(4, 3);
+    g.setCount(11);
+    TEST_ASSERT_EQUAL(0, g.selected());
+    g.right();
+    TEST_ASSERT_EQUAL(1, g.selected());
+    g.select(3);
+    g.right();  // onto the next row
+    TEST_ASSERT_EQUAL(4, g.selected());
+    g.left();
+    TEST_ASSERT_EQUAL(3, g.selected());
+    g.select(10);
+    g.right();  // around
+    TEST_ASSERT_EQUAL(0, g.selected());
+    g.left();
+    TEST_ASSERT_EQUAL(10, g.selected());
+}
+
+void test_up_and_down_stay_in_the_column() {
+    GridModel g(4, 3);
+    g.setCount(11);  // rows of 4, 4 and 3
+    g.select(1);
+    g.down();
+    TEST_ASSERT_EQUAL(5, g.selected());
+    g.down();
+    TEST_ASSERT_EQUAL(9, g.selected());
+    g.down();  // around
+    TEST_ASSERT_EQUAL(1, g.selected());
+    g.up();
+    TEST_ASSERT_EQUAL(9, g.selected());
+}
+
+void test_a_short_last_row_gives_its_last_item() {
+    GridModel g(4, 3);
+    g.setCount(11);
+    g.select(7);  // the fourth column, which the last row doesn't have
+    g.down();
+    TEST_ASSERT_EQUAL(10, g.selected());
+    g.select(3);
+    g.up();
+    TEST_ASSERT_EQUAL(10, g.selected());
+}
+
+void test_rows_scroll_to_keep_the_selection_in_view() {
+    GridModel g(4, 3);
+    g.setCount(18);  // 5 rows
+    TEST_ASSERT_EQUAL(5, g.rows());
+    TEST_ASSERT_EQUAL(0, g.firstVisibleRow());
+    g.select(12);  // the fourth row
+    TEST_ASSERT_EQUAL(1, g.firstVisibleRow());
+    g.select(17);
+    TEST_ASSERT_EQUAL(2, g.firstVisibleRow());
+    g.select(5);
+    TEST_ASSERT_EQUAL(1, g.firstVisibleRow());
+    g.select(0);
+    TEST_ASSERT_EQUAL(0, g.firstVisibleRow());
+}
+
+void test_a_smaller_count_keeps_the_selection_inside() {
+    GridModel g(4, 3);
+    g.setCount(18);
+    g.select(17);
+    g.setCount(6);
+    TEST_ASSERT_EQUAL(5, g.selected());
+    TEST_ASSERT_EQUAL(0, g.firstVisibleRow());
+    g.setCount(0);
+    TEST_ASSERT_EQUAL(-1, g.selected());
+}
+
+int main() {
+    UNITY_BEGIN();
+    RUN_TEST(test_empty_grid_has_no_selection);
+    RUN_TEST(test_left_and_right_go_through_every_item);
+    RUN_TEST(test_up_and_down_stay_in_the_column);
+    RUN_TEST(test_a_short_last_row_gives_its_last_item);
+    RUN_TEST(test_rows_scroll_to_keep_the_selection_in_view);
+    RUN_TEST(test_a_smaller_count_keeps_the_selection_inside);
+    return UNITY_END();
+}

test/test_settings_menu/test_settings_menu.cpp

@@ -46,6 +46,15 @@ void test_toggle_rows_flip_on_select() {
     TEST_ASSERT_FALSE(f.settings.getBool(Setting::Sound));
 }
 
+void test_the_launcher_is_a_grid_or_a_list() {
+    Fixture f;
+    int launcher = f.row(SettingsMenu::Row::Launcher);
+    TEST_ASSERT_EQUAL_STRING("Grid", f.menu.value(launcher).c_str());
+    f.menu.toggle(launcher);
+    TEST_ASSERT_TRUE(f.settings.getBool(Setting::LauncherList));
+    TEST_ASSERT_EQUAL_STRING("List", f.menu.value(launcher).c_str());
+}
+
 void test_choice_rows_list_options_and_mark_the_current_one() {
     Fixture f;
     int tz = f.row(SettingsMenu::Row::Timezone);
@@ -161,6 +170,7 @@ int main() {
     RUN_TEST(test_every_row_has_a_label);
     RUN_TEST(test_values_are_human_readable);
     RUN_TEST(test_toggle_rows_flip_on_select);
+    RUN_TEST(test_the_launcher_is_a_grid_or_a_list);
     RUN_TEST(test_choice_rows_list_options_and_mark_the_current_one);
     RUN_TEST(test_choosing_applies_the_setting);
     RUN_TEST(test_choice_that_breaks_a_rule_is_refused_with_a_reason);