* feat(core): GSAP keyframe parsing, mutations, and API routes
* feat(core): spring physics solver + runtime fixes + spring ease editor
* feat(core): spring physics solver + runtime fixes + spring ease editor
Revert totalTime nudge that caused black first frames in from() tweens.
Keep stale CSS offset cleanup. Regenerate baselines for offset cleanup.
* ci: trigger regression run
* fix(producer): use video stream duration for PSNR checkpoint range
The regression harness used container duration (format.duration) to
compute PSNR checkpoints. Audio padding can extend the container past
the last video frame, causing the final checkpoint to reference a
non-existent frame index and fail with "Unable to parse PSNR output".
Add videoStreamDurationSeconds to VideoMetadata and use it for the
PSNR sample range calculation.
* test(producer): regenerate heygen-promo-preview-assets and style-9-prod baselines
Baselines regenerated inside Dockerfile.test on the devbox to match
the current runtime init.ts changes. Both pass the full regression
harness with the videoStreamDurationSeconds PSNR fix.
* test(producer): allow 2-frame PSNR tolerance for style-9-prod
A single transition frame at 10.742s renders with marginal PSNR
(26.6 dB vs 30 threshold) on CI runners but passes on the devbox
Docker image. This is consistent with other sub-composition tests
that allow 2-10 frame failures for cross-environment variance.
The prepareFlattenedInnerRoot function creates a wrapper div when
inlining sub-compositions. This wrapper had no width/height, which
broke CSS height:100% chains — any sub-composition using percentage
heights with flexbox centering would collapse to 0px and render
content at the top instead of centered.
Read data-width/data-height from the inner root and set matching
pixel dimensions on the wrapper's inline style. Applied in both the
compiler (server-side bundling) and the runtime (browser-side
composition loader).
Adds a producer regression test with a centered card sub-composition
that fails without this fix.