Add combat action sprite sheets

scripts/verify-flow.mjs

@@ -74,6 +74,22 @@ try {
     throw new Error(`Debug battle state was not available: ${JSON.stringify(result.battleState)}`);
   }
 
+  const actionTexturesLoaded = await page.evaluate(() => {
+    const textures = window.__HEROS_GAME__?.textures;
+    return [
+      'unit-liu-bei-actions',
+      'unit-guan-yu-actions',
+      'unit-zhang-fei-actions',
+      'unit-rebel-actions',
+      'unit-rebel-archer-actions',
+      'unit-rebel-cavalry-actions',
+      'unit-rebel-leader-actions'
+    ].every((key) => textures?.exists(key));
+  });
+  if (!actionTexturesLoaded) {
+    throw new Error('Expected all unit action textures to be loaded.');
+  }
+
   const cameraBeforeScroll = result.battleState.camera;
   if (
     !cameraBeforeScroll ||