feat: add native Tomie adapter and strict import compatibility checks

frontend/tests/audio.test.mjs

@@ -56,6 +56,19 @@ test("fade-in respects live volume changes and stays muted at zero", () => {
   assert.equal(elements[0].volume, 0);
 });
 
+test("script track gain multiplies the mixer and survives fades and queued clips", () => {
+  const audio = system();
+  audio.play("voice", ["first", "second"], { volume: 0.25, fadein: 2 });
+  tick(1000);
+  assert.equal(elements[0].volume, 0.125);
+  audio.setVolumes({ ...volumes(), voice: 0.4 });
+  assert.equal(elements[0].volume, 0.05);
+  tick(1000);
+  elements[0].onended();
+  assert.equal(elements.at(-1).src, "second");
+  assert.equal(elements.at(-1).volume, 0.1);
+});
+
 test("outgoing tracks also obey the mixer during crossfade", () => {
   const audio = system();
   audio.play("music", ["old"], {});