feat: Implement reverse video and audio playback toggle

[Abhishek2005-ard]

Description

This PR introduces the new Reverse Playback feature, allowing users to completely reverse the playback direction of both the video frames and audio track.

Changes Made

• Types & Configuration (src/lib/types.ts, src/lib/constants.ts):
  • Added the reverse boolean parameter to the EditRecipe definition and schema validation.
  • Set the default configuration to reverse: false in DEFAULT_RECIPE.
• State Hook Validation (src/hooks/useVideoEditor.ts):
  • Expanded isValidValue to safely permit "reverse" values, ensuring recipe storage debounces and syncs correctly.
• FFmpeg WASM Filters (src/lib/ffmpeg.ts):
  • Injected the reverse filter into the video processing pipeline. It is strategically placed after downscaling to ensure memory efficiency and prevent browser crashes.
  • Injected the areverse filter into the audio pipeline when the original audio is active.
• UI Integration (src/components/AudioSpeedControl.tsx):
  • Added a beautiful "Reverse Playback" toggle button utilizing the Lucide Rewind icon inside the Audio & Speed accordion section.
  • Seamlessly integrated the toggle state with the existing "Reset to Default" logic.

Verification

• Ran npm run lint with 0 errors.
• Ran npx tsc --noEmit with 0 errors.
• Ran npm run build locally, completing the production build successfully.
• Manually tested uploading a video, toggling Reverse Playback, and exporting successfully.

ScreenRecord:-

Screen.Recording.2026-05-24.185635.1.1.mp4

close #1062

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👋 Thanks for your PR, @Abhishek2005-ard!

Welcome to Reframe — a browser-based video editor built for everyone 🎬

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