Improve scene-aware combat gating

internal/modules/dnd/scenedescriptions/registry/registry_test.go

@@ -129,6 +129,55 @@ func TestResolverUsesGeneratedReferenceWhenPresent(t *testing.T) {
 	}
 }
 
+func TestResolverReusesRawAndSemanticallyEquivalentViews(t *testing.T) {
+	baseContent := encodeList(t, sceneList(
+		scene("chunk-1", "session-alpha", 1, 2, dnd.SceneKindCombat, "Original title", "Original summary."),
+	))
+	baseItem := referenceItem(baseContent)
+	baseItem.Digest = semanticDigest(baseContent)
+	resolver, err := NewResolver(contracts.ReferenceSet{Slots: map[string]contracts.ResolvedReferenceSlot{ReferenceSlot: {}}})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	first, err := resolver.Resolve(referenceSet(baseItem))
+	if err != nil {
+		t.Fatal(err)
+	}
+	second, err := resolver.Resolve(referenceSet(baseItem))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if second != first {
+		t.Fatal("identical framework reference did not reuse its immutable view")
+	}
+
+	equivalentContent := encodeList(t, sceneList(
+		scene("chunk-1", "session-alpha", 1, 2, dnd.SceneKindCombat, "Revised title", "Revised summary."),
+	))
+	equivalentItem := referenceItem(equivalentContent)
+	equivalentItem.Digest = semanticDigest(equivalentContent)
+	equivalent, err := resolver.Resolve(referenceSet(equivalentItem))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if equivalent != first {
+		t.Fatal("prose-only change did not reuse the semantic eligibility view")
+	}
+
+	for _, digest := range []string{"", "not-a-sha256-digest"} {
+		fallbackItem := referenceItem(baseContent)
+		fallbackItem.Digest = digest
+		fallback, resolveErr := resolver.Resolve(referenceSet(fallbackItem))
+		if resolveErr != nil {
+			t.Fatal(resolveErr)
+		}
+		if fallback != first {
+			t.Fatalf("digest fallback %q did not reuse the content-addressed view", digest)
+		}
+	}
+}
+
 func TestRegistryIsImmutableAndResolverIsSafeForConcurrentReuse(t *testing.T) {
 	content := encodeList(t, sceneList(scene("chunk-1", "session-alpha", 1, 2, dnd.SceneKindCombat, "Title", "Summary.")))
 	references := referenceSet(referenceItem(content))