feat(spawning): add spawnable block overlay

src/test/java/games/dmg/spigotbase/AdminProgressCounterTest.java

@@ -11,6 +11,19 @@ final class AdminProgressCounterTest {
         new PluginSettingsProvider(PluginSettings.from(Map.of()))
     );
 
+    @Test
+    void settingTotalPlacementCounterUnlocksSpawnableOverlay() {
+        PlayerState player = PlayerState.newPlayer(UUID.randomUUID(), "Alex");
+
+        PlayerState updated = service.setProgress(
+            player,
+            ProgressCounter.TOTAL_PLACEMENTS,
+            250
+        );
+
+        assertEquals(250, updated.totalBlocksPlaced());
+    }
+
     @Test
     void settingPlacementCounterEvaluatesBaseAndWarmupTiers() {
         PlayerState player = PlayerState.newPlayer(UUID.randomUUID(), "Alex");