feat(skills): product-launch-video skill + consolidate motion knowledge into hyperframes-animation (#1745)

* feat(skills): product-launch-video + consolidate motion knowledge into hyperframes-animation

- Add the product-launch-video skill: shot-sequence architecture where each
  visual frame is a time-coded shot sequence picked from a blueprint menu and
  paced to the voiceover (anti-PowerPoint). Includes the frame-worker sub-agent,
  story/visual/motion-design references, and audio/captions/transitions/
  stage-assets/assemble-index scripts.
- Consolidate motion knowledge in hyperframes-animation as the single source of
  truth: promote the updated atomic rules (31 -> 36) and rename product-launch-
  video's archetypes into hyperframes-animation blueprints (13 -> 15, replacing
  the old set). product-launch-video, faceless-explainer, and pr-to-video now
  reference them via ../hyperframes-animation/{rules-index,blueprints-index}.md
  and the rules/blueprints dirs. Fixes the discrete-text-sequence broken links;
  blueprints no longer ship per-id runnable examples, so example references in
  the consumers were dropped.
- Default HeyGen TTS voice to Marcia (deterministic; was the API's first English
  voice, which drifts on catalog re-sort). Override with --voice.
- assemble-index pre-assembly frame guards: auto-repair a sub-comp root missing
  canvas dims; hard-fail on <video>/<audio> inside a sub-comp; hard-fail on a
  timed non-root element missing class="clip" or overlapping same-track clips.
- Lint/CLI: lint media inside sub-compositions as an error; stop false-positive
  caption layout/lint findings; contrast/layout-audit skip elements hidden by an
  invisible ancestor.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* fix(skills): clear CodeQL alerts in assemble-index.mjs

- script/style blanking regex now matches closing tags with trailing
  whitespace (</script >, </style >) — js/bad-tag-filter (high).
- drop the existsSync precheck before reading/repairing a frame file; read
  directly and handle ENOENT, removing the check->write TOCTOU window —
  js/file-system-race (high).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/cli/src/commands/contrast-audit.browser.js

@@ -88,6 +88,25 @@ window.__contrastAudit = async function (imgBase64, time) {
     var cs = getComputedStyle(el);
     if (cs.visibility === "hidden" || cs.display === "none") continue;
     if (parseFloat(cs.opacity) <= 0.01) continue;
+    // Also skip when an ANCESTOR is effectively invisible (opacity≈0 / hidden / display:none).
+    // Karaoke captions keep every word at opacity 1 but toggle the GROUP's opacity per beat,
+    // so an inactive word's OWN opacity is 1 — only an ancestor reveals it's hidden. Without
+    // this, the hidden caption words flood the audit with false ~1:1 contrast warnings.
+    var anc = el.parentElement,
+      ancHidden = false;
+    while (anc && anc !== document.body) {
+      var acs = getComputedStyle(anc);
+      if (
+        acs.visibility === "hidden" ||
+        acs.display === "none" ||
+        parseFloat(acs.opacity) <= 0.01
+      ) {
+        ancHidden = true;
+        break;
+      }
+      anc = anc.parentElement;
+    }
+    if (ancHidden) continue;
     var rect = el.getBoundingClientRect();
     if (rect.width < 8 || rect.height < 8) continue;
     if (rect.right <= 0 || rect.bottom <= 0 || rect.left >= w || rect.top >= h) continue;