@remotion/studio: Batch backspace reset undo entries

[JonnyBurger]

Closes #7897.

Summary

• Batch Backspace resets for selected sequence props through the existing multi-edit sequence save path.
• Add batched effect prop saves so selected effect prop resets create one undo transaction.
• Cover multi-reset request batching and effect undo transaction behavior with focused tests.

Testing

• bun test packages/studio/src/test/timeline-selection.test.ts packages/studio-server/src/test/update-effect-props.test.ts
• bunx oxfmt src --write in packages/studio, packages/studio-server, and packages/studio-shared
• bun run build
• bun run formatting
• bunx turbo run lint formatting --filter='@remotion/studio' --filter='@remotion/studio-server' --filter='@remotion/studio-shared' --no-update-notifier
• bun run stylecheck (blocked by documented @remotion/lambda-go Go 1.22.2 environment caveat)

  

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
bugs	Ready	Preview, Comment	May 31, 2026 8:54pm
remotion	Ready	Preview, Comment	May 31, 2026 8:54pm