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feat(design): waiting-state spectrum 1 — toast overshoot + streaming sweep (D6) - #471
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…sweep (D6) First installment of the D6 full-spectrum decision (taste-skill v1 §9 'AI product feel' motion specs): - Toast arrival overshoot: toasts previously popped into existence with zero motion. 240ms rise + slight over-scale settle (maka-toast-enter) reads as 'something arrived' — Emil's toast tier is 200-300ms; the global reduced-motion clamp applies. Exit motion needs a dismissal window in toast.tsx (instant unmount today) — deferred to a component-level pass. - Composer streaming sweep: while the assistant streams, a 1px status-running light sweep crosses the composer shell top edge — 'working' stays visible exactly where the user's attention returns. Functional infinite motion, status-token derived. - Both animation names added to the #406 functionalMotion whitelist with rationale; composer-inner gains the data-streaming attribute. Desktop suite 1696/1696; streaming-answer fixture verified.
jackwener added a commit
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Jul 3, 2026
) Two queue items from the round-2 study: Toast exit (completes #471's lifecycle): dismissal is now two-phase — the entry is marked exiting, a 180ms shrink/fade plays (exit = enter 240ms x 75%, roadmap motion rule), then the entry unmounts. Toasts no longer vanish mid-glance; exiting toasts drop pointer-events. Exit keyframes whitelisted in the #406 functional-motion contract. Lucide stroke governance (decision D5): call sites had EIGHT different strokeWidth values (1.5/1.6/1.65/1.7/1.75/1.8/1.85/2) across 143 usages plus the default 2 wherever unspecified. One rule (svg.lucide { stroke-width: 1.75 }) overrides every SVG presentation attribute, unifying all glyphs at the distribution's modal weight with zero call-site churn. icon-system-contract gains the positive assertion; its size-hammer ban regex gets (?<!-) so the governed stroke-width rule doesn't false-positive on "width". Markdown parse caching (queue item) evaluated and DOWNGRADED: memoized MessageBody already prevents re-parsing committed turns; the streaming turn's re-parse is essential work. Noted here so it isn't re-proposed. Desktop suite 1697/1697 (+1 contract).
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D6「等待感全谱」第一批（taste v1 §9 谱系）：
1696/1696；streaming-answer fixture 验证。