humanspeak / svelte-motion

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feat: add optimized appear animation handoff (#386)

* feat: add optimized appear animation handoff

- start SSR appear animations before hydration with WAAPI
- adopt optimized animations during hydration without replaying enter
- add docs, examples, unit coverage, and focused e2e coverage

* fix: reuse motion-dom optimized appear internals

Use motion-dom exports for optimized appear constants, transform props,
and WAAPI easing mapping so the SSR bootstrap accepts Motion easing names.

* fix(animate-presence): stabilize layout button dogfood

- bridge layout measurement through motion-dom projection internals
- defer and reveal wait-mode enters without leaving hidden states stuck
- add layout-button dogfood page and e2e coverage for text scaling,
  containment, and one-frame jumps

Sync and popLayout dogfood behavior still need follow-up polish.

* fix(animate-presence): anchor sync layout swaps

- keep placeholders scoped to wait mode only
- observe descendant swaps before the first painted layout frame
- add sync dogfood regressions for click and reset transitions

* fix(animate-presence): stabilize layout swaps during scroll

- Include viewport scroll in projection measurements
- Skip stale release animations after offscreen scroll changes
- Add rolling copy dogfood coverage for shell anchoring

* docs: document failed e2e review workflow

* fix(motion): stabilize optimized appear test timing

- Persist animate resting styles when enter animations complete
- Add jsdom completion fallback for unit tests
- Read transform-persist slow mode through SvelteKit load so SSR
  optimized appear scripts match hydrated timing

* fix(motion): gate optimized appear until ready

Match upstream optimized appear startup by holding a shared ready
animation before starting real WAAPI enter animations. This keeps the
first visible enter frame near the initial state and locks animated
values to the same start time.

* fix(motion): align SVG path drawing with motion-do... (continued)

642 of 870 branches covered (73.79%)

Branch coverage included in aggregate %.

413 of 591 new or added lines in 7 files covered. (69.88%)

2535 of 3732 relevant lines covered (67.93%)

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