feat(kotlin-compose): design system + 33 components + gallery_kt + e2e android emulator + scaffolder fixes

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

cpp/functions/gamedev/audio_engine.cpp

@@ -0,0 +1,38 @@
+// UNICA TU del proyecto que define MINIAUDIO_IMPLEMENTATION.
+#define MINIAUDIO_IMPLEMENTATION
+#include "../../vendor/miniaudio/miniaudio.h"
+
+#include "audio_engine.h"
+
+#include <cstdlib>
+
+namespace fn::audio {
+
+Engine engine_init() {
+    Engine e{nullptr, false};
+    ma_engine* eng = static_cast<ma_engine*>(std::malloc(sizeof(ma_engine)));
+    if (!eng) return e;
+    if (ma_engine_init(NULL, eng) != MA_SUCCESS) {
+        std::free(eng);
+        return e;
+    }
+    e.impl = eng;
+    e.ok   = true;
+    return e;
+}
+
+void engine_shutdown(Engine& e) {
+    if (!e.ok || !e.impl) return;
+    ma_engine* eng = static_cast<ma_engine*>(e.impl);
+    ma_engine_uninit(eng);
+    std::free(eng);
+    e.impl = nullptr;
+    e.ok   = false;
+}
+
+void engine_set_volume(Engine& e, float v) {
+    if (!e.ok || !e.impl) return;
+    ma_engine_set_volume(static_cast<ma_engine*>(e.impl), v);
+}
+
+}  // namespace fn::audio