998565e439
- stream.ts: advanceStream (per-frame, dt cap 50ms), loop generation keys, window math (DOM<=16, queue<=30, 480px buffer), anchorRebuild (photo-position preserving), removePhoto, single-photo static - useVerticalPhotoStream: rAF integration, direct transform writes (no per-frame Vue reactivity), low-frequency item sync, ResizeObserver re-anchor, stepForTest hook - EmbedStream wired to engine; cycle copies aria-hidden; img error -> controlled drop - tests: 14 unit cases (236 viewer total), e2e: 32px/2s speed, boundary continuity <2.5px, DOM<=16 over 20s, 32s recording with loop boundaries Co-Authored-By: Claude Code <noreply@anthropic.com>