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/studio/src/components/editor/floatingPanel.ts

@@ -0,0 +1,54 @@
+export interface FloatingRect {
+  left: number;
+  top: number;
+  right: number;
+  bottom: number;
+  width: number;
+  height: number;
+}
+
+export interface FloatingSize {
+  width: number;
+  height: number;
+}
+
+export interface FloatingPosition {
+  left: number;
+  top: number;
+  placement: "top" | "bottom";
+}
+
+function clamp(value: number, min: number, max: number): number {
+  return Math.max(min, Math.min(max, value));
+}
+
+export function resolveFloatingPanelPosition(
+  anchor: FloatingRect,
+  viewport: FloatingSize,
+  panel: FloatingSize,
+  options?: { offset?: number; margin?: number },
+): FloatingPosition {
+  const offset = options?.offset ?? 8;
+  const margin = options?.margin ?? 12;
+  const maxLeft = Math.max(margin, viewport.width - panel.width - margin);
+  const preferredLeft = anchor.left + anchor.width / 2 - panel.width / 2;
+  const left = clamp(preferredLeft, margin, maxLeft);
+  const belowTop = anchor.bottom + offset;
+  const aboveTop = anchor.top - panel.height - offset;
+  const fitsBelow = belowTop + panel.height <= viewport.height - margin;
+  const fitsAbove = aboveTop >= margin;
+
+  if (fitsBelow || !fitsAbove) {
+    return {
+      left,
+      top: clamp(belowTop, margin, Math.max(margin, viewport.height - panel.height - margin)),
+      placement: "bottom",
+    };
+  }
+
+  return {
+    left,
+    top: clamp(aboveTop, margin, Math.max(margin, viewport.height - panel.height - margin)),
+    placement: "top",
+  };
+}