initial code (#2)

* feat: initial code port from hyperframes-internal

Port all OSS-ready packages from the internal monorepo:
- @hyperframes/core — shared types, HTML generation, GSAP utilities, runtime
- @hyperframes/cli — CLI for creating, previewing, and rendering compositions
- @hyperframes/engine — framework-agnostic rendering engine (BeginFrame + FFmpeg)
- @hyperframes/producer — video rendering pipeline (Puppeteer + FFmpeg)
- @hyperframes/ui-player — browser-based video player component
- @hyperframes/studio — composition editor (React frontend + Hono backend)

Includes regression test suite with Docker-based test harness.

All HeyGen-internal references, deployment infrastructure, and
proprietary assets have been removed. Package names migrated
from @app/* to @hyperframes/*.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: scrub internal codenames and stale references from OSS port

- Replace static.heygen.ai runtime URLs in test fixtures
- Remove internal CDN publish script (publish-hyperframe-runtime.ts)
- Replace sandbox-studio, sandbox-interceptor, __magicEditRuntime
  with neutral names (studio, hyperframe-runtime, __hyperframeRuntime)
- Fix stale Vault API / localhost references in docs
- Remove broken deprecated_studio link

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: remove remaining internal codenames and stale references

- Delete stale producer README.md and PIPELINE.md (referenced nonexistent files)
- Replace "Cerberus" codename with "HyperFrames" in test design reviews
- Replace magic-edit postMessage identifiers with hf-preview/hf-parent
- Rename debug-magic-edit-timeline.ts to debug-timeline.ts
- Replace "Motion Cut" with "HyperFrames" in Timeline comments
- Fix studio/CLI references to nonexistent archive package
  (use local data/projects/ dir, stub render proxy)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/core/src/runtime/state.ts

@@ -0,0 +1,66 @@
+import type { RuntimeDeterministicAdapter, RuntimeTimelineLike } from "./types";
+import type { RuntimeMediaClip } from "./media";
+
+export type RuntimeState = {
+  capturedTimeline: RuntimeTimelineLike | null;
+  isPlaying: boolean;
+  rafId: number | null;
+  currentTime: number;
+  deterministicAdapters: RuntimeDeterministicAdapter[];
+  parityModeEnabled: boolean;
+  canonicalFps: number;
+  bridgeMuted: boolean;
+  playbackRate: number;
+  bridgeLastPostedFrame: number;
+  bridgeLastPostedAt: number;
+  bridgeLastPostedPlaying: boolean;
+  bridgeLastPostedMuted: boolean;
+  bridgeMaxPostIntervalMs: number;
+  timelinePollIntervalId: ReturnType<typeof setInterval> | null;
+  controlBridgeHandler: ((event: MessageEvent) => void) | null;
+  clampDurationLoggedRaw: number | null;
+  beforeUnloadHandler: (() => void) | null;
+  domReadyHandler: (() => void) | null;
+  injectedCompStyles: HTMLStyleElement[];
+  injectedCompScripts: HTMLScriptElement[];
+  cachedTimedMediaEls: Array<HTMLVideoElement | HTMLAudioElement>;
+  cachedMediaClips: RuntimeMediaClip[];
+  cachedVideoClips: RuntimeMediaClip[];
+  cachedMediaTimelineDurationSeconds: number;
+  tornDown: boolean;
+  maxTimelineDurationSeconds: number;
+  nativeVisualWatchdogTick: number;
+};
+
+export function createRuntimeState(): RuntimeState {
+  return {
+    capturedTimeline: null,
+    isPlaying: false,
+    rafId: null,
+    currentTime: 0,
+    deterministicAdapters: [],
+    parityModeEnabled: true,
+    canonicalFps: 30,
+    bridgeMuted: false,
+    playbackRate: 1,
+    bridgeLastPostedFrame: -1,
+    bridgeLastPostedAt: 0,
+    bridgeLastPostedPlaying: false,
+    bridgeLastPostedMuted: false,
+    bridgeMaxPostIntervalMs: 80,
+    timelinePollIntervalId: null,
+    controlBridgeHandler: null,
+    clampDurationLoggedRaw: null,
+    beforeUnloadHandler: null,
+    domReadyHandler: null,
+    injectedCompStyles: [],
+    injectedCompScripts: [],
+    cachedTimedMediaEls: [],
+    cachedMediaClips: [],
+    cachedVideoClips: [],
+    cachedMediaTimelineDurationSeconds: 0,
+    tornDown: false,
+    maxTimelineDurationSeconds: 1800,
+    nativeVisualWatchdogTick: 0,
+  };
+}