feat(registry): bring back the video-primitive moves (#3169)

Restores the 208 catalog items reverted after their previews 404'd in
production, this time on the payload mechanism rather than the .html files
that caused the outage.

The generator no longer writes a preview document to docs/public. That writer,
and the machinery under it, existed only to produce files the docs host
discards, so it is gone rather than bypassed. Items now embed the composition
itself via a payload, which is what the previous change already does for the
items that were already in the catalog.

The variables explorer is parked, not restored: it drove its preview through
the same unpublished .html path, so it would have shown an empty frame. Items
that declare variables get the live player plus the static variables table, and
reconnecting the explorer to payloads is a follow-up.

registry/components/blur-out-up/blur-out-up.html

@@ -0,0 +1,110 @@
+<!--
+  Blur Out Up - remocn typography primitive for HyperFrames.
+
+  Paste the markup, CSS and script into a composition. Drive the timeline
+  integration from a paused GSAP timeline so renders remain deterministic.
+
+  Variables. The script reads each one, falls back to the declared default on
+  anything missing or unrecognised, and writes the result as a custom property
+  the CSS above consumes. The timeline recipe below is untouched by them: it
+  keeps driving one offset and one blur, and these decide what that offset and
+  that blur mean on screen.
+
+    - direction (up | down | left | right, default up): where the offset
+      points. up rises into place, down drops in, left and right slide in
+      along the baseline.
+    - distance (close | standard | far, default standard): scales the offset.
+      close covers half the run, far nearly double, in the same time.
+    - blur (soft | standard | heavy, default standard): scales the blur radius,
+      from a light haze to a full smear.
+    - tone (ink | paper | accent, default ink): word colour. ink is near-black
+      for light frames, paper near-white for dark ones, accent rides --brand.
+
+  On every default the result is identical to the original: words rise 22px
+  through a 5px blur in near-black.
+-->
+
+<div
+  class="hf-remocn-blur-out-up"
+  data-composition-variables='[
+    { "id": "direction", "type": "enum", "role": "motion", "label": "Direction", "description": "Where the offset the timeline drives points.", "default": "up", "options": [{ "value": "up", "label": "Up" }, { "value": "down", "label": "Down" }, { "value": "left", "label": "Left" }, { "value": "right", "label": "Right" }] },
+    { "id": "distance", "type": "enum", "role": "motion", "label": "Distance", "description": "Scales the travel offset, so the words cover a shorter or longer run in the same time.", "default": "standard", "options": [{ "value": "close", "label": "Close" }, { "value": "standard", "label": "Standard" }, { "value": "far", "label": "Far" }] },
+    { "id": "blur", "type": "enum", "role": "style", "label": "Blur", "description": "Scales the blur radius the timeline drives, from a light haze to a full smear.", "default": "standard", "options": [{ "value": "soft", "label": "Soft" }, { "value": "standard", "label": "Standard" }, { "value": "heavy", "label": "Heavy" }] },
+    { "id": "tone", "type": "enum", "role": "style", "label": "Tone", "description": "Word colour: ink for light frames, paper for dark ones, accent rides --brand.", "default": "ink", "options": [{ "value": "ink", "label": "Ink" }, { "value": "paper", "label": "Paper" }, { "value": "accent", "label": "Accent" }] }
+  ]'
+>
+  <span>HELLO</span>
+</div>
+
+<style>
+  .hf-remocn-blur-out-up {
+    color: var(--hf-word-color, #18181b);
+    font-family: Inter, system-ui, sans-serif;
+    font-weight: 900;
+    letter-spacing: -0.04em;
+  }
+  .hf-remocn-blur-out-up {
+    display: inline-flex;
+    gap: 12px;
+    font-size: 56px;
+    line-height: 1;
+  }
+  .hf-remocn-blur-out-up span {
+    display: inline-block;
+    transform: translate(
+        calc(var(--hf-word-x, 0px) + var(--hf-word-y, 0px) * var(--hf-word-axis-x, 0)),
+        calc(var(--hf-word-y, 0px) * var(--hf-word-axis-y, 1))
+      )
+      scale(var(--hf-word-scale, 1));
+    filter: blur(calc(var(--hf-word-blur, 0px) * var(--hf-word-blur-scale, 1)));
+    will-change: transform, filter, opacity;
+  }
+</style>
+
+<script>
+  (function () {
+    "use strict";
+
+    var vars =
+      window.__hyperframes && window.__hyperframes.getVariables
+        ? window.__hyperframes.getVariables()
+        : {};
+
+    // Unrecognised overrides return to their declared defaults.
+    var axes = {
+      up: { x: 0, y: 1 },
+      down: { x: 0, y: -1 },
+      left: { x: -1, y: 0 },
+      right: { x: 1, y: 0 },
+    };
+    var reaches = { close: 0.5, standard: 1, far: 1.85 };
+    var blurScales = { soft: 0.45, standard: 1, heavy: 2.2 };
+    var tones = {
+      ink: "#18181b",
+      paper: "#fafafa",
+      accent: "var(--brand, #34d399)",
+    };
+
+    function pick(table, value, fallback) {
+      return Object.prototype.hasOwnProperty.call(table, value) ? value : fallback;
+    }
+
+    var axis = axes[pick(axes, vars.direction, "up")];
+    var reach = reaches[pick(reaches, vars.distance, "standard")];
+    var blurScale = blurScales[pick(blurScales, vars.blur, "standard")];
+    var tone = tones[pick(tones, vars.tone, "ink")];
+
+    var roots = document.querySelectorAll(".hf-remocn-blur-out-up");
+    for (var i = 0; i < roots.length; i += 1) {
+      roots[i].style.setProperty("--hf-word-axis-x", String(axis.x * reach));
+      roots[i].style.setProperty("--hf-word-axis-y", String(axis.y * reach));
+      roots[i].style.setProperty("--hf-word-blur-scale", String(blurScale));
+      roots[i].style.setProperty("--hf-word-color", tone);
+    }
+  })();
+</script>
+
+<!--
+  Timeline integration:
+  tl.fromTo('.hf-remocn-blur-out-up span', { opacity: 0, '--hf-word-y': '22px', '--hf-word-scale': 0.92, '--hf-word-blur': '5px' }, { opacity: 1, '--hf-word-y': '0px', '--hf-word-scale': 1, '--hf-word-blur': '0px', duration: 0.3, stagger: 0.055, ease: 'power3.out' }, startTime);
+-->