fix(product-launch): consolidate media brand and audio contracts (#2408)

* fix(product-launch): preserve hoisted media offsets

* fix(product-launch): preserve brand font and accent roles

* fix(product-launch): honor TTS provider selection

* fix(product-launch): preserve approved video geometry

* fix(skills): enforce media geometry and font classification

* fix(skills): align secondary brand accents

skills/product-launch-video/scripts/audio.test.mjs

@@ -0,0 +1,46 @@
+import assert from "node:assert/strict";
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { spawnSync } from "node:child_process";
+import test from "node:test";
+
+const script = new URL("./audio.mjs", import.meta.url).pathname;
+
+function runAudio({ args = [], env = {} } = {}) {
+  const dir = mkdtempSync(join(tmpdir(), "product-launch-audio-"));
+  const engine = join(dir, "engine.mjs");
+  writeFileSync(join(dir, "STORYBOARD.md"), "message: Test\n");
+  writeFileSync(
+    engine,
+    `import { readFileSync, writeFileSync } from "node:fs";
+const argv = process.argv.slice(2);
+const flag = (name) => argv[argv.indexOf(name) + 1];
+const request = JSON.parse(readFileSync(flag("--request"), "utf8"));
+writeFileSync(new URL("request.json", import.meta.url), JSON.stringify(request));
+writeFileSync(flag("--out"), JSON.stringify({ voices: [], bgm: null, sfx: [] }));
+`,
+  );
+  const result = spawnSync(
+    process.execPath,
+    [script, "--hyperframes", dir, "--storyboard", join(dir, "STORYBOARD.md"), ...args],
+    { encoding: "utf8", env: { ...process.env, HF_MEDIA_ENGINE: engine, ...env } },
+  );
+  assert.equal(result.status, 0, result.stderr);
+  return JSON.parse(readFileSync(join(dir, "request.json"), "utf8"));
+}
+
+test("passes --provider to the shared audio engine", () => {
+  assert.equal(runAudio({ args: ["--provider", "kokoro"] }).provider, "kokoro");
+});
+
+test("uses HF_TTS_PROVIDER when --provider is omitted", () => {
+  assert.equal(runAudio({ env: { HF_TTS_PROVIDER: "elevenlabs" } }).provider, "elevenlabs");
+});
+
+test("--provider takes precedence over HF_TTS_PROVIDER", () => {
+  assert.equal(
+    runAudio({ args: ["--provider", "kokoro"], env: { HF_TTS_PROVIDER: "elevenlabs" } }).provider,
+    "kokoro",
+  );
+});