feat: Persist Studio manual edits via manifest (#593)

## Summary

Studio manual geometry edits now persist as a project-local manifest instead of being baked into composition source on each gesture.

The manifest lives at:

```text
.hyperframes/studio-manual-edits.json
```

It is the source of truth for manual drag, resize, rotation, inspector geometry edits, group moves, and selected-layer reset.

## Architecture

- **Manifest-backed edits**: each edit stores a kind (`path-offset`, `box-size`, `rotation`), a source-scoped target, and the edit values.
- **Source-scoped resolution**: targets include `sourceFile`, `id`, `selector`, and `selectorIndex`, so duplicate selectors in nested compositions resolve against the owning source file.
- **Additive CSS layer**: move uses CSS `translate`, resize writes stable dimensions/flex sizing, and rotation uses CSS `rotate` over the authored base.
- **Shared replay runtime**: Studio preview, thumbnails, frame capture, producer renders, and CLI Studio renders/thumbnails all use the same core manual-edit render script.
- **Animation-safe replay**: Studio reapplies the manual layer after load, refresh, timeline seeks, player operations, playback frames, thumbnail seeks, and render seeks instead of rewriting GSAP timelines.
- **History and handoff**: the manifest is a normal project file, so undo/redo and agent edits can preserve, modify, or remove manual visual edits explicitly.

## User Impact

Users can move, resize, rotate, group-move, and reset supported layers from the canvas or inspector, then refresh, capture thumbnails/screenshots, play animated compositions, and render videos without manual edits drifting away from the edited state.

## Main Files

- `packages/studio/src/components/editor/manualEdits.ts`
- `packages/studio/src/components/editor/DomEditOverlay.tsx`
- `packages/studio/src/components/editor/PropertyPanel.tsx`
- `packages/studio/src/App.tsx`
- `packages/core/src/studio-api/helpers/manualEditsRenderScript.ts`
- `packages/studio/vite.config.ts`
- `packages/cli/src/server/studioServer.ts`
- `packages/core/src/compiler/htmlBundler.ts`
- `packages/producer/src/services/htmlCompiler.ts`
- `packages/core/src/studio-api/routes/thumbnail.ts`
- `packages/producer/src/services/fileServer.ts`
- `packages/producer/src/services/renderOrchestrator.ts`

## Test Plan

```bash
volta run --node 22.20.0 bun run build
volta run --node 22.20.0 bun run --filter @hyperframes/core test -- src/studio-api/helpers/manualEditsRenderScript.test.ts
volta run --node 22.20.0 bun run --filter @hyperframes/core typecheck
volta run --node 22.20.0 bun run --filter @hyperframes/studio typecheck
volta run --node 22.20.0 bun run --filter @hyperframes/cli typecheck
volta run --node 22.20.0 bunx oxlint <changed files>
volta run --node 22.20.0 bunx oxfmt --check <changed files>
git diff --check
```

packages/core/src/studio-api/helpers/screenshotClip.ts

@@ -5,8 +5,15 @@ export interface ScreenshotClip {
   height: number;
 }
 
-export function getElementScreenshotClip(selector: string): ScreenshotClip | undefined {
-  const el = document.querySelector(selector);
+export function getElementScreenshotClip(
+  selector: string,
+  selectorIndex?: number,
+): ScreenshotClip | undefined {
+  const matches = Array.from(document.querySelectorAll(selector)).filter(
+    (el): el is HTMLElement => el instanceof HTMLElement,
+  );
+  const safeIndex = Math.max(0, Math.min(matches.length - 1, Math.floor(selectorIndex ?? 0)));
+  const el = matches[safeIndex] ?? null;
   if (!(el instanceof HTMLElement)) return undefined;
   const rect = el.getBoundingClientRect();
   if (rect.width < 4 || rect.height < 4) return undefined;