Updated game structure

src/persistence/Scores.h

@@ -0,0 +1,20 @@
+// Scores.h - High score persistence manager
+#pragma once
+#include <vector>
+#include <string>
+
+struct ScoreEntry { int score{}; int lines{}; int level{}; double timeSec{}; std::string name{"PLAYER"}; };
+
+class ScoreManager {
+public:
+    explicit ScoreManager(size_t maxScores = 12);
+    void load();
+    void save() const;
+    void submit(int score, int lines, int level, double timeSec);
+    const std::vector<ScoreEntry>& all() const { return scores; }
+private:
+    std::vector<ScoreEntry> scores;
+    size_t maxEntries;
+    std::string filePath() const; // resolve path (SDL pref path or local)
+    void createSampleScores(); // create sample high scores
+};