Minor: New Game Yu-Gi-Oh! Bandai (#22)

core/include/ccm/services/YuGiOhBandaiSetCompletion.hpp

@@ -0,0 +1,51 @@
+#pragma once
+
+// Pure helpers: Bandai set-completion progress and per-set checklists.
+// Ownership keys on (set.id, normalized setNo). Never name-only.
+
+#include "ccm/domain/Enums.hpp"
+#include "ccm/domain/YuGiOhBandaiCard.hpp"
+#include "ccm/domain/YuGiOhBandaiSetCatalog.hpp"
+
+#include <cstddef>
+#include <optional>
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace ccm {
+
+struct YuGiOhBandaiSetCompletionProgress {
+    std::string setId;
+    std::string setName;
+    std::size_t ownedUnique{0};
+    std::size_t total{0};
+
+    [[nodiscard]] int percent() const noexcept {
+        if (total == 0) return 0;
+        return static_cast<int>((ownedUnique * 100) / total);
+    }
+};
+
+struct YuGiOhBandaiChecklistEntry {
+    std::string setNo;
+    std::string name;
+    std::string rarity;
+    bool        owned{false};
+};
+
+[[nodiscard]] std::vector<Language>
+yuGiOhBandaiLanguagesInCollection(const std::vector<YuGiOhBandaiCard>& collection);
+
+[[nodiscard]] std::vector<YuGiOhBandaiSetCompletionProgress>
+computeYuGiOhBandaiSetCompletion(const std::vector<YuGiOhBandaiCard>& collection,
+                                 const YuGiOhBandaiSetCatalog&        catalog,
+                                 std::optional<Language> languageFilter = std::nullopt);
+
+[[nodiscard]] std::vector<YuGiOhBandaiChecklistEntry>
+yuGiOhBandaiChecklistForSet(const std::vector<YuGiOhBandaiCard>& collection,
+                            const YuGiOhBandaiSetCatalog&        catalog,
+                            std::string_view                     setId,
+                            std::optional<Language> languageFilter = std::nullopt);
+
+}  // namespace ccm