feat(film): live-interaction product film foundation

Capture pipeline (Playwright recordVideo + injected synthetic cursor + ffmpeg webm->mp4) and a Remotion LiveFilm composition driven by a 20-clip manifest with caption/zoom overlays and a music bed. Includes the capture orchestrator, storm-intel reference scene, pre-render smoke check, and VO script. Pure logic is unit-tested (28 passing). Remaining scene scripts are authored during live capture.

marketing/product-film/src/LiveFilm.tsx

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+import { Series, AbsoluteFill } from "remotion";
+import manifest from "./clips.manifest.json";
+import { totalLiveFrames, type ClipsManifest } from "./clips";
+import { DURATIONS } from "./timing";
+import { ClipStage } from "./components/ClipStage";
+import { AudioTrack } from "./components/AudioTrack";
+import { Promise as PromiseSeq } from "./sequences/Promise";
+
+const m = manifest as ClipsManifest;
+export const LIVE_TOTAL = totalLiveFrames(m) + DURATIONS.promise;
+
+export const LiveFilm: React.FC = () => {
+  const [hero, ...rest] = m.clips; // landing-hero is first in the manifest
+  return (
+    <AbsoluteFill>
+      <AudioTrack totalFrames={LIVE_TOTAL} />
+      <Series>
+        <Series.Sequence durationInFrames={hero.durationFrames}>
+          <ClipStage clip={hero} />
+        </Series.Sequence>
+        <Series.Sequence durationInFrames={DURATIONS.promise}>
+          <PromiseSeq />
+        </Series.Sequence>
+        {rest.map((clip) => (
+          <Series.Sequence key={clip.id} durationInFrames={clip.durationFrames}>
+            <ClipStage clip={clip} />
+          </Series.Sequence>
+        ))}
+      </Series>
+    </AbsoluteFill>
+  );
+};