@remotion/studio: Move keyframe settings to easing inspector

[JonnyBurger]

Summary

• move keyframe settings from a modal into the easing inspector
• save extrapolation, output, and posterize changes immediately
• remove the keyframe settings actions from property context menus

Testing

• bunx turbo run make --filter='@remotion/studio'
• bunx turbo run lint test --filter='@remotion/studio'
• bun run build
• bun run stylecheck

Closes #8960

[vercel]

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Project	Deployment	Actions	Updated (UTC)
bugs	Ready	Preview, Comment	Jul 15, 2026 1:55pm
remotion	Ready	Preview, Comment	Jul 15, 2026 1:55pm

[pullfrog]

ℹ️ No critical issues — one minor UX suggestion inline.

Reviewed changes — moves keyframe extrapolation, output, and posterize controls out of the modal and into the easing inspector, switching them to immediate save and removing the context-menu entries that previously opened the modal.

• EasingInspector.tsx now requires a non-null easingUpdate and renders <KeyframeSettings update={easingUpdate} /> inline.
• KeyframeSettings.tsx is a new inline control panel replacing the deleted KeyframeSettingsModal.tsx.
• Modals.tsx and packages/studio/src/state/modals.ts remove the keyframe-settings modal type.
• TimelineEffectPropItem.tsx and TimelineSequencePropItem.tsx remove the ModalsContext wiring and the Keyframe settings... context-menu item.

  ^{｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using Kimi K2 (free via Pullfrog for OSS) ｜ 𝕏}