[verified] Retry dropped display refreshes

tests/native/test_display_refresh_retry.cpp

@@ -0,0 +1,22 @@
+#include <cassert>
+
+#include "lib/tdeck_ui/Hardware/TDeck/DisplayRefreshRetry.h"
+
+int main() {
+    Hardware::TDeck::DisplayRefreshRetry retry;
+
+    assert(!retry.consume());
+
+    retry.mark_failed();
+    assert(retry.consume());
+    assert(!retry.consume());
+
+    // Multiple dropped regions before the refresh cycle completes coalesce
+    // into one full-screen retry on the next LVGL cycle.
+    retry.mark_failed();
+    retry.mark_failed();
+    assert(retry.consume());
+    assert(!retry.consume());
+
+    return 0;
+}