feat(registry): add beat-freeze-cut

Beat-driven speed ramp, freeze-frame hit, and hard cut for music-led
promos and montages. Contributed as #2957; applied here as content so the
whole catalog set lands together.

Verified by rendering: 6s, clean, deterministic (the one Math.random hit
is a comment above a fixed pattern array). Opaque root, so no demo.html
is needed for its catalog preview.

Co-authored-by: akiyoshisan1218 <akiyoshisan1218@users.noreply.github.com>

Author: miguel-heygen

docs/catalog/blocks/beat-freeze-cut.mdx

@@ -0,0 +1,44 @@
+---
+title: "Beat Freeze Cut"
+description: "A beat-driven speed ramp, freeze-frame hit, and hard-cut sequence for music-led promos and montages."
+---
+
+# Beat Freeze Cut
+
+A beat-driven speed ramp, freeze-frame hit, and hard-cut sequence for music-led promos and montages.
+
+`transition` `music` `beat-driven` `freeze-frame`
+
+<video className="w-full aspect-video rounded-xl object-cover bg-zinc-100 dark:bg-zinc-800" src="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/beat-freeze-cut.mp4" poster="https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/beat-freeze-cut.png" autoPlay muted loop playsInline />
+
+## Install
+
+<CodeGroup>
+
+```bash Terminal
+npx hyperframes add beat-freeze-cut
+```
+
+</CodeGroup>
+
+## Details
+
+| Property | Value |
+| --- | --- |
+| Type | Block |
+| Dimensions | 1920×1080 |
+| Duration | 6s |
+
+## Files
+
+| File | Target | Type |
+| --- | --- | --- |
+| `beat-freeze-cut.html` | `compositions/beat-freeze-cut.html` | hyperframes:composition |
+
+## Usage
+
+After installing, add the block to your host composition:
+
+```html
+<div data-composition-id="beat-freeze-cut" data-composition-src="compositions/beat-freeze-cut.html" data-start="0" data-duration="6" data-track-index="1" data-width="1920" data-height="1080"></div>
+```

docs/docs.json

@@ -303,6 +303,7 @@
           {
             "group": "CSS Transitions",
             "pages": [
+              "catalog/blocks/beat-freeze-cut",
               "catalog/blocks/hw-scribble-transition",
               "catalog/blocks/mk-clone-wall-transition",
               "catalog/blocks/organic-light-leak-overlay",

docs/public/catalog-index.json

@@ -27,6 +27,20 @@
     "href": "/catalog/blocks/apple-money-count",
     "preview": "https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/apple-money-count.png"
   },
+  {
+    "name": "beat-freeze-cut",
+    "type": "block",
+    "title": "Beat Freeze Cut",
+    "description": "A beat-driven speed ramp, freeze-frame hit, and hard-cut sequence for music-led promos and montages.",
+    "tags": [
+      "transition",
+      "music",
+      "beat-driven",
+      "freeze-frame"
+    ],
+    "href": "/catalog/blocks/beat-freeze-cut",
+    "preview": "https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/beat-freeze-cut.png"
+  },
   {
     "name": "blue-sweater-intro-video",
     "type": "block",