{"$schema":"https://ui.shadcn.com/schema/registry-item.json","name":"scroll-area","type":"registry:component","title":"Scroll area","description":"A native scroll region with thin overlay thumbs and edge fades that show only where more content waits; thumbs can be dragged or clicked.","categories":["layout"],"dependencies":["@radix-ui/react-direction@1.1.4","@radix-ui/react-slot@1.3.3","clsx@^2.1.1","lucide-react@^1.48.0","motion@^13.4.4","tailwind-merge@^3.7.0"],"registryDependencies":["https://beamline.io/registry/look-prism.json"],"files":[{"path":"beamline/components/button/button-variants.ts","type":"registry:file","target":"src/ui/beamline/components/button/button-variants.ts","content":"import { cn } from \"../../lib/utils\";\nimport styles from \"./button.module.css\";\n\nexport type ButtonVariant = \"primary\" | \"secondary\" | \"outline\" | \"ghost\" | \"danger\" | \"accent\";\n/** sm 32 · md 36 · lg 40 · touch 44 (a bottom action bar on a phone). */\nexport type ButtonSize = \"sm\" | \"md\" | \"lg\" | \"touch\";\n/** Market side: buy fills with --pui-up, sell with --pui-down (a red-up market flips the two tokens, not the code). */\nexport type ButtonTone = \"up\" | \"down\";\n\n/** Which paint role paints each variant: filled variants are solids, the quiet ones keep their own light paint. */\nconst ROLE: Record<ButtonVariant, string | undefined> = {\n  primary: \"m-solid\",\n  accent: \"m-solid\",\n  secondary: \"m-control\",\n  outline: undefined,\n  ghost: undefined,\n  danger: undefined,\n};\n\n/** A variant's paint without the button's layout, for a group that wears one button's look (SplitButton paints the\n *  pair as one button and leaves its halves transparent). */\nexport function buttonPaint(variant: ButtonVariant = \"primary\", tone?: ButtonTone) {\n  return cn(ROLE[variant], styles[variant], tone && styles[tone]);\n}\n\n/** The classes that make any element look like a Button, for parts that render their own element. */\nexport function buttonClassName({\n  variant = \"primary\",\n  size = \"md\",\n  tone,\n  className,\n}: { variant?: ButtonVariant; size?: ButtonSize; tone?: ButtonTone; className?: string } = {}) {\n  return cn(styles.root, ROLE[variant], styles[variant], tone && styles[tone], styles[size], className);\n}\n"},{"path":"beamline/components/button/button.module.css","type":"registry:file","target":"src/ui/beamline/components/button/button.module.css","content":"@layer properties, theme, base, components, utilities;\n@layer components {\n  /* Button. Every colour, size and duration is a token; a variant only sets the four local properties below. */\n  .root {\n    --_button-bg: transparent;\n    --_button-bg-hover: var(--pui-hover);\n    --_button-fg: var(--pui-ink);\n    --_button-edge: none;\n    --_button-height: var(--pui-control-height-md);\n    --_button-pad: 14px;\n    position: relative;\n    isolation: isolate;\n    display: inline-flex;\n    align-items: center;\n    justify-content: center;\n    gap: var(--pui-space-1-5);\n    flex-shrink: 0;\n    height: var(--_button-height);\n    min-width: var(--_button-height);\n    /* never wider than its room: in a narrow card the label ends in an ellipsis instead of spilling (the full words\n       stay the accessible name) */\n    max-width: 100%;\n    padding-inline: var(--_button-pad);\n    border: 0;\n    /* Nested context: inside a frame that sets --pui-nest-radius and --pui-nest-inset (and --pui-nest-ceiling for pills)\n       the corner is the shared nested corner (.nest-corner, utilities.css: radius − inset, or the button's own radius\n       where that would fall under the chip radius); elsewhere the control radius. --pui-button-radius wins over both. */\n    border-radius: var(--pui-button-radius, var(--pui-nested, var(--pui-radius-control)));\n    color: var(--_button-fg);\n    font-family: var(--pui-font-body);\n    font-size: var(--pui-text-sm);\n    font-weight: var(--pui-weight-medium);\n    line-height: 1;\n    letter-spacing: var(--pui-tracking-body);\n    white-space: nowrap;\n    text-decoration: none;\n    cursor: pointer;\n    user-select: none;\n    -webkit-tap-highlight-color: transparent;\n    /* frequency law: hover arrives at 0ms (below), leaves over the ruled departure; opacity and translate are listed\n       so a button that waits for attention (.reveal) fades away like every reveal instead of vanishing */\n    transition:\n      var(--m-transition),\n      background-color var(--pui-motion-out) var(--pui-ease-default),\n      color var(--pui-motion-out) var(--pui-ease-default),\n      opacity var(--pui-motion-out) var(--pui-ease-default),\n      translate var(--pui-motion-out) var(--pui-ease-default);\n  }\n  /* the quiet variants paint themselves; filled and secondary variants are painted by their look role (m-solid,\n   m-control), which these zero-specificity rules can never override */\n  :where(.root) {\n    background: var(--_button-bg);\n    box-shadow: var(--_button-edge);\n  }\n  :where(.root:hover:not(:disabled, [aria-disabled=\"true\"])) {\n    background: var(--_button-bg-hover);\n  }\n  .root:hover:not(:disabled, [aria-disabled=\"true\"]) {\n    transition-duration: 0ms;\n  }\n  /* the asChild form has no motion: a CSS press instead */\n  .root:not(button):active {\n    transform: scale(0.97);\n  }\n  .root:disabled,\n  .root[aria-disabled=\"true\"]:not([data-loading]) {\n    opacity: var(--pui-opacity-disabled);\n    cursor: not-allowed;\n  }\n  .root[data-loading] {\n    cursor: progress;\n  }\n\n  /* Icons: 16px unless the icon says otherwise (zero specificity, so size-5 or an inline size wins) */\n  :where(.root) :where(svg) {\n    width: var(--pui-icon-md);\n    height: var(--pui-icon-md);\n    flex-shrink: 0;\n  }\n\n  .sm {\n    --_button-height: var(--pui-control-height-sm);\n    --_button-pad: var(--pui-space-2-5);\n    /* the base gap (--pui-space-1-5); 5px had no scale step, and 6px also lets the loader's negative margin cancel\n       the gap exactly at every size */\n  }\n  .md {\n    --_button-height: var(--pui-control-height-md);\n    --_button-pad: 14px;\n  }\n  .lg {\n    --_button-height: var(--pui-control-height-lg);\n    --_button-pad: var(--pui-space-4);\n    font-size: var(--pui-text-base);\n  }\n  /* a bottom action bar on a phone: the 44 px touch target (a platform minimum, not a spacing step, so it holds when\n     the spacing parameter changes — O1 §14.2), the large label */\n  .touch {\n    --_button-height: calc(var(--pui-control-height-lg) + 0.25rem);\n    --_button-pad: var(--pui-space-5);\n    font-size: var(--pui-text-base);\n  }\n  .root[data-icon-only] {\n    padding-inline: 0;\n    width: var(--_button-height);\n  }\n\n  /* the main action: ink on the page, inverted per theme */\n  .primary {\n    --m-color: var(--pui-ink);\n    --_button-fg: var(--pui-ink-inverse);\n  }\n  .secondary {\n    --_button-fg: var(--pui-ink);\n  }\n  .outline {\n    --_button-edge: inset 0 0 0 1px var(--pui-line-strong);\n    --_button-bg-hover: var(--pui-hover);\n  }\n  .ghost {\n    --_button-fg: var(--pui-ink-2);\n    --_button-bg-hover: var(--pui-hover);\n  }\n  .ghost:hover:not(:disabled) {\n    color: var(--pui-ink);\n  }\n  .danger {\n    --_button-fg: var(--pui-red);\n    --_button-edge: inset 0 0 0 1px color-mix(in oklab, var(--pui-red) 42%, transparent);\n    --_button-bg-hover: var(--pui-red-tint);\n  }\n  .accent {\n    --m-color: var(--pui-accent);\n    --_button-fg: var(--pui-accent-foreground);\n  }\n\n  /* Market side. Declared after the variants so it wins: a filled variant takes the side's colour and its on-colour\n     ink; a quiet variant keeps its paint and colours the label. */\n  .up {\n    --m-color: var(--pui-up);\n    --_button-fg: var(--pui-up);\n  }\n  .down {\n    --m-color: var(--pui-down);\n    --_button-fg: var(--pui-down);\n  }\n  .ghost:is(.up, .down):hover:not(:disabled) {\n    color: var(--_button-fg);\n  }\n  .primary.up,\n  .accent.up {\n    --_button-fg: var(--pui-on-up);\n  }\n  .primary.down,\n  .accent.down {\n    --_button-fg: var(--pui-on-down);\n  }\n\n  /* The main actions' light, where the look provides one, as a spectrum. Glow spills a soft light in the brand's\n     spectrum from under the button's bottom edge (clipped at it, so it never tints the face) that brightens under the\n     pointer. Prism keeps it inside the glass (--m-solid-glow-fit: 1): the face the light leaves by, the bottom edge,\n     splits it into a crisp line with a faint wash rising into the face, only while pointed at. Every other look\n     leaves --m-solid-glow at none, so the layer does not exist. */\n  .primary::after,\n  .accent::after {\n    --_fit: var(--m-solid-glow-fit, 0);\n    content: var(--m-solid-glow);\n    position: absolute;\n    z-index: -1;\n    top: calc((1 - var(--_fit)) * (100% + var(--m-solid-glow-gap, 0px)));\n    inset-inline: var(--m-solid-glow-inset, 14%);\n    height: var(--m-solid-glow-height, 14px);\n    border-radius: calc(\n      var(--_fit) * var(--pui-button-radius, var(--pui-nested, var(--pui-radius-control))) + (1 - var(--_fit)) *\n        var(--pui-radius-pill)\n    );\n    background: var(--m-spectrum);\n    background-size: var(--m-spectrum-size, 100% 100%);\n    /* the part of the spectrum that shows: this button's own angle (--m-prism-seed, new at every press), turned by\n       where the pointer is across the face (--m-prism-x) in a look that turns it (--m-solid-glow-turn) */\n    background-position: calc((var(--m-prism-seed, 0.3) + var(--m-prism-x, 0.5) * var(--m-solid-glow-turn, 0)) * 100%) 0;\n    filter: blur(var(--m-solid-glow-blur, 9px));\n    clip-path: var(--m-solid-glow-clip, inset(0 -32px -32px -32px));\n    mask: var(--m-solid-glow-mask, none);\n    mask-position:\n      0 0,\n      calc(var(--m-prism-seed, 0.3) * 100%) 0;\n    mask-composite: intersect;\n    opacity: var(--m-solid-glow-rest, 0.75);\n    scale: var(--m-solid-glow-scale, 1) 1;\n    pointer-events: none;\n    transition:\n      opacity var(--pui-motion-out) var(--pui-ease-default),\n      scale var(--pui-motion-out) var(--pui-ease-default),\n      background-position var(--pui-duration-considered) var(--pui-ease-default),\n      mask-position var(--pui-duration-considered) var(--pui-ease-default);\n  }\n  /* pointed at: the light brightens (glow) or grows out from the centre and drifts along while the pointer stays\n     (prism) */\n  .primary:hover::after,\n  .accent:hover::after {\n    opacity: 1;\n    scale: 1 1;\n    transition-duration: var(--m-solid-glow-in, 0ms);\n    animation: var(--m-solid-glow-flow, none);\n  }\n  /* A change of word or colour (Save → Saved, a tone turning green) passes a band of split light across the face once,\n     in a look that has one (prism: --m-solid-shift-light; the pen hook's ::before is free on a solid otherwise). */\n  .primary[data-shift]::before,\n  .accent[data-shift]::before {\n    content: var(--m-solid-shift-light, none);\n    position: absolute;\n    inset: 0;\n    z-index: -1;\n    border: 0;\n    border-radius: inherit;\n    background: var(--m-spectrum) 0 0 / var(--m-spectrum-size, 100% 100%);\n    mask: linear-gradient(105deg, transparent 39%, #000 47.5%, #000 52.5%, transparent 61%) 0 0 / 300% 100% no-repeat;\n    opacity: 0;\n    animation: prism-shift calc(var(--pui-duration-considered) * 2.2) var(--pui-ease-default);\n    pointer-events: none;\n  }\n  @keyframes prism-shift {\n    from {\n      mask-position: 100% 0;\n      opacity: 0.25;\n    }\n    35% {\n      opacity: 0.55;\n    }\n    to {\n      mask-position: 0 0;\n      opacity: 0;\n    }\n  }\n  @media (prefers-reduced-motion: reduce) {\n    .primary::after,\n    .accent::after {\n      transition: none;\n      animation: none !important;\n    }\n    .primary[data-shift]::before,\n    .accent[data-shift]::before {\n      content: none;\n    }\n  }\n  .root:disabled::after,\n  .root[aria-disabled=\"true\"]::after {\n    content: none;\n  }\n\n  /* The loader opens its own width, and the negative margin cancels the gap so the label does not jump */\n  .loader {\n    display: inline-flex;\n    overflow: hidden;\n    margin-inline-end: calc(var(--pui-space-1-5) * -1);\n  }\n  .loader > * {\n    margin-inline-end: var(--pui-space-1-5);\n  }\n  .spinner {\n    color: currentColor;\n  }\n  .root[data-icon-only] .loader {\n    margin-inline-end: 0;\n  }\n  .root[data-icon-only] .loader > * {\n    margin-inline-end: 0;\n  }\n\n  /* The label holds its place while the text inside swaps; the leaving text pops out of flow against it */\n  .label {\n    position: relative;\n    display: inline-flex;\n    justify-content: center;\n    min-width: 0;\n    overflow: visible;\n  }\n  /* the clip box is let out by a little over a line so descenders are never cut, without changing the layout */\n  .text {\n    display: inline-block;\n    max-width: 100%;\n    margin-block: -0.2em;\n    padding-block: 0.2em;\n    overflow: hidden;\n    text-overflow: ellipsis;\n    white-space: nowrap;\n  }\n  .label[data-morphing] > .text {\n    overflow: visible;\n    text-overflow: clip;\n  }\n}\n\n@layer components {\n  :global(.pui[data-motion=\"reduced\"]) .root:not(button):active,\n  :global(.pui[data-motion=\"none\"]) .root:not(button):active {\n    transform: none;\n  }\n  @media (prefers-reduced-motion: reduce) {\n    .root:not(button):active {\n      transform: none;\n    }\n  }\n}\n/* CSS-module composition only; visual rules stay in the component layer. */\n.root {\n  composes: nest-corner from global;\n}\n"},{"path":"beamline/components/button/button.tsx","type":"registry:file","target":"src/ui/beamline/components/button/button.tsx","content":"\"use client\";\n\nimport { useMessages } from \"../../runtime/localization\";\nimport { english as englishMessages } from \"./messages\";\nimport {\n  Children,\n  Fragment,\n  isValidElement,\n  useLayoutEffect,\n  useRef,\n  type ButtonHTMLAttributes,\n  type PointerEvent,\n  type ReactNode,\n  type Ref,\n  type RefObject,\n  type ComponentProps,\n} from \"react\";\nimport { AnimatePresence, LazyMotion, m, spring, useIsPresent } from \"motion/react\";\nimport { animate } from \"motion/mini\";\nimport * as Slot from \"@radix-ui/react-slot\";\nimport { Spinner } from \"../spinner/spinner\";\nimport type { BuiltInLook as Look } from \"../../runtime/preset\";\nimport { useComposedRef } from \"../../hooks/use-composed-ref\";\nimport { useMotionTokens } from \"../../hooks/use-motion-tokens\";\nimport { cn } from \"../../lib/utils\";\nimport styles from \"./button.module.css\";\n\nexport type { ButtonVariant, ButtonSize, ButtonTone } from \"./button-variants\";\nexport { buttonPaint, buttonClassName } from \"./button-variants\";\nimport { buttonClassName, type ButtonVariant, type ButtonSize, type ButtonTone } from \"./button-variants\";\nimport type { ButtonDefaults } from \"./defaults\";\nexport type { ButtonDefaults } from \"./defaults\";\nimport { useComponentDefaults } from \"../../runtime/appearance\";\nimport { useReducedMotionSafe } from \"../../hooks/use-reduced-motion-safe\";\n\ntype NativeProps = Omit<\n  ButtonHTMLAttributes<HTMLButtonElement>,\n  \"onDrag\" | \"onDragEnd\" | \"onDragStart\" | \"onAnimationStart\"\n>;\n\nexport interface ButtonProps extends NativeProps {\n  /** Visual weight: primary (ink-filled), secondary, outline, ghost, danger, or accent (filled with the brand). */\n  variant?: ButtonVariant;\n  /** Height 32 / 36 / 40 px; touch 44 px for a bottom action bar on a phone. */\n  size?: ButtonSize;\n  /** Market side. On primary/accent the fill becomes --pui-up (buy) or --pui-down (sell); on the quiet variants the\n   *  label takes that colour. Pair it with a word or arrow: colour is never the only signal. */\n  tone?: ButtonTone;\n  /** Shows a loader in front of the label, sets aria-busy and ignores clicks; size and focus stay. */\n  loading?: boolean;\n  classNames?: Partial<Record<\"root\" | \"label\" | \"loader\", string>>;\n  /** Paint this button in another look than the one in force around it (DESIGN-LANGUAGE.md \"Looks\"). */\n  look?: Look;\n  /** Render the single child (a link, a Radix trigger) with the button's look instead of a <button>. */\n  asChild?: boolean;\n  /** A square button holding only an icon (give it an aria-label). Decided by the children when left out: icon-only when\n   *  no words sit anywhere among them (an icon, or a frame of icons), so `<span>Close</span>` is a label. */\n  iconOnly?: boolean;\n  ref?: Ref<HTMLButtonElement>;\n}\n\n// Motion's animation features arrive in a deferred chunk (AT11): the button renders and works at once, and its press,\n// loader and label motion run once they land, a frame or two after mount. Buttons that mount after that get the\n// loaded features directly, so they render once instead of again when a lazy load resolves.\ntype Features = typeof import(\"./motion-features\").default;\nlet loaded: Features | null = null;\nconst features = () =>\n  import(\"./motion-features\").then((module) => {\n    loaded = module.default;\n    return loaded;\n  });\n\n/** Children with fragments opened up, so `{busy ? <><Icon />Saving</> : …}` reads as icon plus text. */\nconst flat = (children: ReactNode): ReactNode[] =>\n  Children.toArray(children).flatMap((c) =>\n    isValidElement<{ children?: ReactNode }>(c) && c.type === Fragment ? flat(c.props.children) : [c],\n  );\n\n/** Whether any words sit anywhere inside (an icon, or a frame of icons, has none). */\nfunction hasText(node: ReactNode): boolean {\n  if (typeof node === \"string\") return node.trim() !== \"\";\n  if (typeof node === \"number\") return true;\n  if (Array.isArray(node)) return node.some(hasText);\n  return isValidElement<{ children?: ReactNode }>(node) && hasText(node.props.children);\n}\n\n/** Splits children into the text run (the label that can change) and everything else (icons), in order, and says\n *  whether any element carries content of its own (a `<span>Close</span>` label, unlike an icon). */\nfunction split(children: ReactNode) {\n  const parts = flat(children);\n  const text = parts\n    .filter((p) => typeof p === \"string\" || typeof p === \"number\")\n    .join(\"\")\n    .trim();\n  const firstText = parts.findIndex((p) => typeof p === \"string\" || typeof p === \"number\");\n  const before = firstText === -1 ? parts : parts.slice(0, firstText).filter(isValidElement);\n  const after = firstText === -1 ? [] : parts.slice(firstText).filter(isValidElement);\n  const content = parts.some((p) => isValidElement<{ children?: ReactNode }>(p) && hasText(p.props.children));\n  return { text, before, after, content };\n}\n\n/**\n * The action control. Hover answers at once and lets go over --pui-motion-out; a press scales down at once, or swells\n * on the snappy spring where the look's --pui-press-scale is above 1 (glass), never on a trigger that anchors a\n * floating layer, which would measure a resized box; a changed label slides in while the\n * width follows on a critically damped spring; loading keeps the size and the focus.\n */\nexport function Button({\n  variant: variantProp,\n  size: sizeProp,\n  tone: toneProp,\n  loading = false,\n  look,\n  asChild = false,\n  iconOnly: iconOnlyProp,\n  className,\n  classNames,\n  children,\n  type,\n  onClick,\n  onPointerMove,\n  onPointerDown,\n  disabled,\n  ref,\n  ...props\n}: ButtonProps) {\n  const i18n = useMessages(\"button\", englishMessages);\n\n  const defaults = useComponentDefaults<ButtonDefaults>(\"button\", [\"variant\", \"size\", \"tone\"]);\n  const variant = variantProp ?? defaults.variant ?? \"primary\";\n  const size = sizeProp ?? defaults.size ?? \"md\";\n  const tone = toneProp ?? defaults.tone;\n  const host = useRef<HTMLButtonElement>(null);\n  const attach = useComposedRef(host, ref);\n  const motionTokens = useMotionTokens(host);\n  const requestedReduced = useReducedMotionSafe();\n  const reduced = requestedReduced || motionTokens.reduced;\n  // Reduced motion keeps a restrained fade; none removes it (APPEARANCE A06).\n  const fade = motionTokens.mode === \"none\" ? 0 : motionTokens.fade.in;\n  // a caller's aria-disabled keeps the button focusable (focus never drops after Save resolves) but inert to presses\n  const softDisabled = props[\"aria-disabled\"] === true || props[\"aria-disabled\"] === \"true\";\n  const { text, before, after, content } = split(children);\n  const prism = usePrismLight(host, variant === \"primary\" || variant === \"accent\", `${text}|${tone}|${variant}`);\n  // with asChild the text sits inside the child (the link), not among our own children\n  const inner = asChild && isValidElement<{ children?: ReactNode }>(children) ? split(children.props.children) : null;\n  const iconOnly = iconOnlyProp ?? (inner ? !inner.text && !inner.content : !text && !content);\n  const anchor =\n    (props[\"aria-haspopup\"] != null && props[\"aria-haspopup\"] !== false && props[\"aria-haspopup\"] !== \"false\") ||\n    \"data-state\" in props;\n  const shared = {\n    \"data-slot\": \"button\",\n    \"data-variant\": variant,\n    \"data-size\": size,\n    \"data-tone\": tone,\n    \"data-icon-only\": iconOnly ? \"\" : undefined,\n    \"data-loading\": loading ? \"\" : undefined,\n    \"data-look\": look,\n    className: buttonClassName({ variant, size, tone, className: cn(classNames?.root, className) }),\n  };\n\n  if (asChild)\n    return (\n      <Slot.Root {...shared} {...props} ref={attach}>\n        {children}\n      </Slot.Root>\n    );\n\n  const button = (\n    <m.button\n      ref={attach}\n      type={type ?? \"button\"}\n      {...shared}\n      {...props}\n      disabled={disabled}\n      aria-busy={loading || undefined}\n      aria-disabled={loading || softDisabled || undefined}\n      onPointerMove={(e) => {\n        prism.turn(e);\n        onPointerMove?.(e);\n      }}\n      onPointerDown={(e) => {\n        prism.press();\n        onPointerDown?.(e);\n      }}\n      onClick={(e) => {\n        if (loading || softDisabled) {\n          e.preventDefault();\n          return;\n        }\n        onClick?.(e);\n      }}\n      whileTap={\n        reduced || anchor || disabled || loading || softDisabled\n          ? undefined\n          : {\n              scale: motionTokens.pressScale,\n              // a press that sinks lands at once; one that swells toward the finger (glass) grows on the spring\n              transition: motionTokens.pressScale > 1 ? motionTokens.spring.snappy : { duration: 0 },\n            }\n      }\n      transition={{ scale: motionTokens.spring.snappy }}\n    >\n      <AnimatePresence initial={false}>\n        {loading && (\n          <m.span\n            key=\"loader\"\n            data-slot=\"button-loader\"\n            className={cn(styles.loader, classNames?.loader)}\n            initial={reduced ? { opacity: 0 } : { width: 0, opacity: 0 }}\n            animate={{ width: \"auto\", opacity: 1 }}\n            exit={reduced ? { opacity: 0 } : { width: 0, opacity: 0 }}\n            transition={{ duration: reduced ? fade : motionTokens.duration.standard, ease: motionTokens.ease.default }}\n          >\n            <Spinner size=\"sm\" label={i18n(\"working\")} className={styles.spinner} />\n          </m.span>\n        )}\n      </AnimatePresence>\n      {iconOnly ? !loading && before : before}\n      {!iconOnly && text && (\n        <Label text={text} reduced={!!reduced} fade={fade} motionTokens={motionTokens} className={classNames?.label} />\n      )}\n      {after}\n    </m.button>\n  );\n  return <LazyMotion features={loaded ?? features}>{button}</LazyMotion>;\n}\n\n/**\n * The main action's light inside the glass, in a look that draws one (prism): its own angle from the start, turned by\n * where the pointer is across the face, a new angle at every press, and a sweep of split light (data-shift) when the\n * button's word, tone or variant changes after it first appears. Writes two style properties and one attribute on the\n * button; nothing runs at rest. Looks without this light ignore all three.\n */\nfunction usePrismLight(host: RefObject<HTMLButtonElement | null>, solid: boolean, state: string) {\n  const frame = useRef(0);\n  const shown = useRef(state);\n  const ending = useRef(0);\n  useLayoutEffect(() => {\n    const el = host.current;\n    if (el && solid) el.style.setProperty(\"--m-prism-seed\", Math.random().toFixed(3));\n  }, [host, solid]);\n  useLayoutEffect(() => {\n    const el = host.current;\n    if (!el || !solid || shown.current === state) return;\n    shown.current = state;\n    // restart the sweep if it is still running\n    delete el.dataset.shift;\n    void el.offsetWidth;\n    el.dataset.shift = \"\";\n    clearTimeout(ending.current);\n    ending.current = window.setTimeout(() => delete el.dataset.shift, 1200);\n  }, [host, solid, state]);\n  useLayoutEffect(\n    () => () => {\n      clearTimeout(ending.current);\n      cancelAnimationFrame(frame.current);\n    },\n    [],\n  );\n  return {\n    turn: (e: PointerEvent<HTMLButtonElement>) => {\n      if (!solid || e.pointerType !== \"mouse\" || frame.current) return;\n      const el = e.currentTarget;\n      const x = e.clientX;\n      frame.current = requestAnimationFrame(() => {\n        frame.current = 0;\n        const r = el.getBoundingClientRect();\n        if (r.width) el.style.setProperty(\"--m-prism-x\", ((x - r.left) / r.width).toFixed(3));\n      });\n    },\n    press: () => {\n      if (solid) host.current?.style.setProperty(\"--m-prism-seed\", Math.random().toFixed(3));\n    },\n  };\n}\n\n/** The text run. When it changes, the old words leave upward and the new ones rise in, while the width moves from the\n *  old measure to the new one; no measuring happens while the label is unchanged. */\nfunction Label({\n  text,\n  reduced,\n  fade,\n  motionTokens,\n  className,\n}: {\n  text: string;\n  reduced: boolean;\n  /** Seconds of the label crossfade under reduced motion (0 under none). */\n  fade: number;\n  /** The button's own, resolved at the button: the label sits inside it, in the same look and motion. */\n  motionTokens: ReturnType<typeof useMotionTokens>;\n  className?: string;\n}) {\n  const slot = useRef<HTMLSpanElement>(null);\n  const latest = useRef(motionTokens);\n  useLayoutEffect(() => {\n    latest.current = motionTokens;\n  }, [motionTokens]);\n  const last = useRef<{ text: string; width: number } | null>(null);\n  useLayoutEffect(() => {\n    const el = slot.current;\n    if (!el) return;\n    const prev = last.current;\n    // first mount: read the width after paint, when layout is already clean, instead of forcing a layout per button\n    if (!prev) {\n      last.current = { text, width: Number.NaN };\n      const id = requestAnimationFrame(() => {\n        if (last.current?.text === text) last.current = { text, width: el.getBoundingClientRect().width };\n      });\n      return () => cancelAnimationFrame(id);\n    }\n    el.style.width = \"\";\n    const width = el.getBoundingClientRect().width;\n    last.current = { text, width };\n    // a label that is not rendered (a hidden toolbar on a phone) has nothing to animate\n    if (prev.text === text || reduced || Number.isNaN(prev.width) || !el.getClientRects().length) return;\n    // The same spring, played natively: motion/mini samples the generator into a linear() easing.\n    const { visualDuration, bounce } = latest.current.spring.morph;\n    // while the width eases the words are clipped, not cut short with an ellipsis (that is for a room too narrow)\n    el.dataset.morphing = \"\";\n    const run = animate(el, { width: [`${prev.width}px`, `${width}px`] }, { type: spring, visualDuration, bounce });\n    run.then(() => {\n      el.style.width = \"\";\n      delete el.dataset.morphing;\n    });\n    // cancel, not stop: stop commits the running value, which throws once the element stops being rendered, and the\n    // next change measures afresh anyway\n    return () => {\n      run.cancel();\n      el.style.width = \"\";\n      delete el.dataset.morphing;\n    };\n  }, [text, reduced]);\n  // A label that changes faster than its words can rise in (a count read live while a hand drags) shows each new\n  // value at once: otherwise every value would start invisible and the button would read blank for the whole drag.\n  const rapid = useRapid(text, motionTokens.duration.standard * 1000);\n  const enter = reduced ? { opacity: 0 } : { opacity: 0, y: \"0.45em\", filter: `blur(${motionTokens.blur.subtle}px)` };\n  const leave = reduced\n    ? { opacity: 0 }\n    : {\n        opacity: 0,\n        y: \"-0.45em\",\n        filter: `blur(${motionTokens.blur.subtle}px)`,\n        transition: { duration: motionTokens.duration.fast },\n      };\n  return (\n    <span ref={slot} data-slot=\"button-label\" className={cn(styles.label, className)}>\n      <AnimatePresence mode=\"popLayout\" initial={false} custom={rapid}>\n        <Words\n          key={text}\n          className={styles.text}\n          custom={rapid}\n          variants={{\n            enter: (fast: boolean) => (fast ? { opacity: 1, y: \"0em\", filter: \"blur(0px)\" } : enter),\n            shown: { opacity: 1, y: \"0em\", filter: \"blur(0px)\" },\n            leave: (fast: boolean) => (fast ? { opacity: 0, transition: { duration: 0 } } : leave),\n          }}\n          initial=\"enter\"\n          animate=\"shown\"\n          exit=\"leave\"\n          transition={{ duration: reduced ? fade : motionTokens.duration.standard, ease: motionTokens.ease.default }}\n        >\n          {text}\n        </Words>\n      </AnimatePresence>\n    </span>\n  );\n}\n\n/** Whether `text` changed again within `ms` of its last change. Read in render: the answer belongs to this text. */\nfunction useRapid(text: string, ms: number) {\n  const seen = useRef({ text, at: Number.NEGATIVE_INFINITY, rapid: false });\n  if (seen.current.text !== text) {\n    const at = performance.now();\n    seen.current = { text, at, rapid: at - seen.current.at < ms };\n  }\n  return seen.current.rapid;\n}\n\n/** One label's words. Leaving, they are already gone for assistive tech: the button's name is the new label at once,\n *  not both while the old words animate away (or for good, where time stands still in a test). */\nfunction Words(props: ComponentProps<typeof m.span>) {\n  const present = useIsPresent();\n  return <m.span {...props} aria-hidden={present ? undefined : true} />;\n}\n\nexport default Button;\n"},{"path":"beamline/components/button/defaults.ts","type":"registry:file","target":"src/ui/beamline/components/button/defaults.ts","content":"import type { ButtonSize, ButtonTone, ButtonVariant } from \"./button-variants\";\n/** Scoped design choices only; no loading, events or domain state. */\nexport interface ButtonDefaults {\n  variant?: ButtonVariant;\n  size?: ButtonSize;\n  tone?: ButtonTone;\n}\n"},{"path":"beamline/components/button/messages.ts","type":"registry:file","target":"src/ui/beamline/components/button/messages.ts","content":"import type { MessageDefinitions } from \"../../runtime/messages\";\n/** Built-in English copy; stable keys are the public translation API. */\nexport const english = {\n  working: \"Working\",\n} satisfies MessageDefinitions;\n"},{"path":"beamline/components/button/motion-features.ts","type":"registry:file","target":"src/ui/beamline/components/button/motion-features.ts","content":"// REASON: Motion's DOM animation features (tween, spring, presence, press) are loaded after the first paint, so a\n// Button costs a small part of Motion on first load; LazyMotion in button.tsx renders until they arrive.\nimport { domAnimation } from \"motion/react\";\n\nexport default domAnimation;\n"},{"path":"beamline/components/scroll-area/messages.ts","type":"registry:file","target":"src/ui/beamline/components/scroll-area/messages.ts","content":"import type { MessageDefinitions } from \"../../runtime/messages\";\n/** Built-in English copy; stable keys are the public translation API. */\nexport const english = {\n  backToTheTop: \"Back to the top\",\n  backToTheEnd: \"Back to the end\",\n} satisfies MessageDefinitions;\n"},{"path":"beamline/components/scroll-area/scroll-area.module.css","type":"registry:file","target":"src/ui/beamline/components/scroll-area/scroll-area.module.css","content":"@layer properties, theme, base, components, utilities;\n@layer components {\n  .root {\n    position: relative;\n    overflow: hidden;\n  }\n  /* The viewport's own ring would be clipped by the root and masked by the edge fades, so keyboard focus draws the\n     look's focus ring on the root instead. */\n  .viewport {\n    width: 100%;\n    height: 100%;\n    outline: none;\n  }\n  .root:has(> .viewport:focus-visible) {\n    outline: var(--pui-focus-width) var(--pui-focus-style) var(--pui-focus-ring);\n    outline-offset: 2px;\n  }\n  /* The overlay bar is the system scrollbar (DESIGN-LANGUAGE \"Scrollbars\"): same thumb tokens, shown while scrolling,\n     pointed at, or always. It arrives at once and leaves slowly. */\n  .track {\n    position: absolute;\n    z-index: 1;\n    opacity: 0;\n    transition: opacity var(--pui-duration-considered) var(--pui-ease-default);\n  }\n  /* the bar stays clear of a rounded frame's corners (scroll areas usually sit in a card), so the thumb never cuts\n     across a corner curve */\n  .track[data-axis=\"y\"] {\n    inset-block: max(var(--pui-space-1), var(--pui-radius-card));\n    inset-inline-end: 2px;\n    width: var(--pui-scrollbar-size, 8px);\n  }\n  .track[data-axis=\"x\"] {\n    inset-inline: max(var(--pui-space-1), var(--pui-radius-card));\n    bottom: 2px;\n    height: var(--pui-scrollbar-size, 8px);\n  }\n  .root:hover > .track,\n  .root[data-scrollbars=\"always\"] > .track,\n  .root[data-scrolling] > .track,\n  .root:has(> .viewport:focus-visible) > .track {\n    opacity: 1;\n    transition-duration: 0ms;\n  }\n  .thumb {\n    position: absolute;\n    border-radius: var(--pui-radius-pill);\n    background: var(--pui-scrollbar-thumb);\n    touch-action: none; /* a finger on the thumb drags it, not the content under it */\n  }\n  .track[data-axis=\"y\"] > .thumb {\n    inset-inline: 1px;\n  }\n  .track[data-axis=\"x\"] > .thumb {\n    inset-block: 1px;\n  }\n  .thumb:hover,\n  .thumb:active {\n    background: var(--pui-scrollbar-thumb-hover);\n  }\n  /* pointed at, the bar firms up to its full width so it is easier to take; it slims again over --pui-motion-out */\n  .track > .thumb {\n    transition: inset var(--pui-motion-out) var(--pui-ease-default);\n  }\n  .track[data-axis=\"y\"]:hover > .thumb,\n  .track[data-axis=\"y\"] > .thumb:active {\n    inset-inline: 0;\n    transition-duration: 0ms;\n  }\n  .track[data-axis=\"x\"]:hover > .thumb,\n  .track[data-axis=\"x\"] > .thumb:active {\n    inset-block: 0;\n    transition-duration: 0ms;\n  }\n\n  /* The way back to an end: it waits unseen until the view is more than a screenful away, then rises in over\n     --pui-motion-in; reaching the end lets it go over --pui-motion-out. It floats over the content at the end it\n     leads to, never taking room. */\n  .jump {\n    position: absolute;\n    z-index: 2;\n    inset-inline: 0;\n    display: flex;\n    justify-content: center;\n    opacity: 0;\n    translate: 0 calc(var(--_dir, 1) * 6px * var(--pui-motion-travel, 1));\n    pointer-events: none;\n    transition:\n      opacity var(--pui-motion-out) var(--pui-ease-default),\n      translate var(--pui-motion-out) var(--pui-ease-default);\n  }\n  .jump[data-side=\"start\"] {\n    --_dir: -1;\n    top: var(--pui-space-2);\n  }\n  .jump[data-side=\"end\"] {\n    bottom: var(--pui-space-2);\n  }\n  .jump[data-shown] {\n    opacity: 1;\n    translate: 0 0;\n    transition-duration: var(--pui-motion-in);\n  }\n  .jump[data-shown] > * {\n    pointer-events: auto;\n  }\n}\n/* CSS-module composition only; visual rules stay in the component layer. */\n.viewport {\n  composes: scrollbar-none from global;\n}\n"},{"path":"beamline/components/scroll-area/scroll-area.tsx","type":"registry:file","target":"src/ui/beamline/components/scroll-area/scroll-area.tsx","content":"\"use client\";\n\nimport { useMessages } from \"../../runtime/localization\";\nimport { english as englishMessages } from \"./messages\";\nimport {\n  useCallback,\n  useEffect,\n  useLayoutEffect,\n  useRef,\n  useState,\n  type CSSProperties,\n  type ReactNode,\n  type Ref,\n  type RefObject,\n  type UIEvent,\n} from \"react\";\nimport { ArrowDown, ArrowUp } from \"lucide-react\";\nimport { Button } from \"../button/button\";\nimport { useComposedRef } from \"../../hooks/use-composed-ref\";\nimport { useDrag } from \"../../hooks/use-drag\";\nimport { useReducedMotionSafe } from \"../../hooks/use-reduced-motion-safe\";\nimport { useAppearance } from \"../../runtime/appearance\";\nimport { cn } from \"../../lib/utils\";\nimport { useExpiring } from \"../../hooks/use-expiring\";\nimport styles from \"./scroll-area.module.css\";\n\nexport interface ScrollAreaEdges {\n  /** Whether more content exists above the viewport. Required. */\n  top: boolean;\n  /** Whether more content exists below the viewport. Required. */\n  bottom: boolean;\n  /** Whether more content exists to the left of the viewport. Required. */\n  left: boolean;\n  /** Whether more content exists to the right of the viewport. Required. */\n  right: boolean;\n}\n\nexport type ScrollAreaClassNames = Partial<Record<\"root\" | \"viewport\" | \"track\" | \"thumb\", string>>;\nexport interface ScrollAreaProps {\n  /** Receives the documented root element; no ref by default. */\n  ref?: Ref<HTMLDivElement>;\n  /** Inline styles on the documented visual root; no inline overrides by default. */\n  style?: CSSProperties;\n  /** Classes for the named visual parts; no part overrides by default. */\n  classNames?: ScrollAreaClassNames;\n  /** Content rendered inside the component. Required. */\n  children: ReactNode;\n  /** Which way it scrolls. Default vertical. */\n  orientation?: \"vertical\" | \"horizontal\" | \"both\";\n  /** Length of the edge fades in px; 0 turns them off. Default 24. */\n  fade?: number;\n  /** auto: thumbs appear while scrolling or pointed at; always: they stay. */\n  scrollbars?: \"auto\" | \"always\";\n  /** ms the thumbs stay after scrolling stops. Default 800. */\n  hideDelay?: number;\n  /** Maximum height before the content scrolls. Defaults to unbounded content height. */\n  maxHeight?: CSSProperties[\"maxHeight\"];\n  /** CSS scroll-snap-type for the viewport, e.g. \"x mandatory\". */\n  snap?: CSSProperties[\"scrollSnapType\"];\n  /** Names the region and makes it focusable, so arrow keys and Page Up/Down scroll it. */\n  label?: string;\n  /** For horizontal rows: a vertical wheel scrolls sideways. */\n  wheelToHorizontal?: boolean;\n  /** Classes on the scrolling viewport; no viewport override by default. */\n  viewportClassName?: string;\n  /** Inline styles on the scrolling viewport; no viewport overrides by default. */\n  viewportStyle?: CSSProperties;\n  /** Receives the scrolling viewport; no ref by default. */\n  viewportRef?: Ref<HTMLDivElement>;\n  /** Reports the viewport scroll position; no handler by default. */\n  onScroll?: (event: UIEvent<HTMLDivElement>) => void;\n  /** Which ends are reached: for \"load more\" or a sticky header shadow. */\n  onEdgeChange?: (edges: ScrollAreaEdges) => void;\n  /** A way back that appears once the view is more than a screenful from this end (vertical): \"start\" for a log with\n   *  the newest at the top, \"end\" for a feed or a chat that grows at the bottom. */\n  jump?: \"start\" | \"end\";\n  /** The way back's words. Default \"Back to the top\" / \"Back to the end\". */\n  jumpLabel?: string;\n  /** Classes on the documented visual root; no override by default. */\n  className?: string;\n}\n\n/**\n * A native scroll region with thin overlay thumbs and edge fades that show only where more content waits. The\n * browser does the scrolling (touch, wheel, keys, find-in-page); the thumbs can be dragged or clicked.\n */\nexport function ScrollArea({\n  children,\n  orientation = \"vertical\",\n  fade = 24,\n  scrollbars = \"auto\",\n  hideDelay = 800,\n  maxHeight,\n  snap,\n  label,\n  wheelToHorizontal = false,\n  viewportClassName,\n  viewportStyle,\n  viewportRef,\n  onScroll,\n  onEdgeChange,\n  jump,\n  jumpLabel,\n  className,\n  classNames,\n  style,\n  ref,\n}: ScrollAreaProps) {\n  const i18n = useMessages(\"scroll-area\", englishMessages);\n\n  const view = useRef<HTMLDivElement | null>(null);\n  const attachViewport = useComposedRef(view, viewportRef);\n  const appearance = useAppearance();\n  // sizes change on resize; where the view is scrolled changes every frame of a scroll and is never React state: the\n  // thumbs are moved directly and React renders again only when an edge is reached or left\n  const [m, setM] = useState({ sh: 0, ch: 0, sw: 0, cw: 0, rtl: false });\n  const [at, setAt] = useState({ top: true, bottom: true, start: true, end: true });\n  // more than a screenful away from the end a way back is offered (React hears only when that changes)\n  const [far, setFar] = useState(false);\n  const reducedMotion = useReducedMotionSafe();\n  const [active, setActive] = useExpiring<true>(hideDelay);\n  const edges = useRef<string>(\"\");\n  const thumbs = useRef<{ x: HTMLDivElement | null; y: HTMLDivElement | null }>({ x: null, y: null });\n  const y = orientation !== \"horizontal\",\n    x = orientation !== \"vertical\";\n\n  /** Moves each thumb to where the view is scrolled: a transform written straight to the thumb, no render. */\n  const place = useCallback(() => {\n    const el = view.current;\n    if (!el) return;\n    const rtl = getComputedStyle(el).direction === \"rtl\";\n    for (const axis of [\"x\", \"y\"] as const) {\n      const thumb = thumbs.current[axis];\n      const track = thumb?.parentElement;\n      if (!thumb || !track) continue;\n      const room = axis === \"y\" ? track.clientHeight : track.clientWidth;\n      const size = axis === \"y\" ? el.clientHeight : el.clientWidth;\n      const content = axis === \"y\" ? el.scrollHeight : el.scrollWidth;\n      const offset = axis === \"y\" ? el.scrollTop : Math.abs(el.scrollLeft);\n      const length = Math.min(room, Math.max(24, (size / content) * room));\n      const pos = content > size ? (offset / (content - size)) * (room - length) : 0;\n      thumb.style.transform = axis === \"y\" ? `translateY(${pos}px)` : `translateX(${rtl ? -pos : pos}px)`;\n    }\n  }, []);\n  /** Which ends are reached; React hears of it only when that changes. */\n  const reach = useCallback(() => {\n    const el = view.current;\n    if (!el) return;\n    if (jump) {\n      const away = jump === \"start\" ? el.scrollTop : el.scrollHeight - el.clientHeight - el.scrollTop;\n      setFar(away > el.clientHeight);\n    }\n    const rtl = getComputedStyle(el).direction === \"rtl\";\n    const sl = Math.abs(el.scrollLeft);\n    const e = {\n      top: el.scrollTop <= 1,\n      bottom: el.scrollTop + el.clientHeight >= el.scrollHeight - 1,\n      left: rtl ? sl + el.clientWidth >= el.scrollWidth - 1 : sl <= 1,\n      right: rtl ? sl <= 1 : sl + el.clientWidth >= el.scrollWidth - 1,\n    };\n    const key = JSON.stringify(e);\n    if (key === edges.current) return;\n    edges.current = key;\n    setAt({\n      top: e.top,\n      bottom: e.bottom,\n      start: rtl ? e.right : e.left,\n      end: rtl ? e.left : e.right,\n    });\n    onEdgeChange?.(e);\n  }, [onEdgeChange, jump]);\n  const measure = useCallback(() => {\n    const el = view.current;\n    if (!el) return;\n    const next = {\n      sh: el.scrollHeight,\n      ch: el.clientHeight,\n      sw: el.scrollWidth,\n      cw: el.clientWidth,\n      rtl: getComputedStyle(el).direction === \"rtl\",\n    };\n    setM((p) =>\n      p.sh === next.sh && p.ch === next.ch && p.sw === next.sw && p.cw === next.cw && p.rtl === next.rtl ? p : next,\n    );\n    reach();\n  }, [reach]);\n  useLayoutEffect(() => {\n    const el = view.current;\n    if (!el) return;\n    measure();\n    const ro = new ResizeObserver(measure);\n    ro.observe(el);\n    if (el.firstElementChild) ro.observe(el.firstElementChild);\n    return () => ro.disconnect();\n  }, [measure, appearance]);\n  // after every render (a size changed, a thumb mounted) the thumbs are placed again\n  useLayoutEffect(place);\n  useEffect(() => {\n    const el = view.current;\n    if (!el || !wheelToHorizontal) return;\n    const on = (e: WheelEvent) => {\n      if (Math.abs(e.deltaY) > Math.abs(e.deltaX) && el.scrollWidth > el.clientWidth) {\n        el.scrollLeft += e.deltaY * (getComputedStyle(el).direction === \"rtl\" ? -1 : 1);\n        e.preventDefault();\n      }\n    };\n    el.addEventListener(\"wheel\", on, { passive: false });\n    return () => el.removeEventListener(\"wheel\", on);\n  }, [wheelToHorizontal]);\n\n  const flash = () => {\n    setActive(true);\n  };\n  const overY = y && m.sh > m.ch + 1,\n    overX = x && m.sw > m.cw + 1;\n  const { top: atTop, bottom: atBottom, start: atStart, end: atEnd } = at;\n  const grad = (dir: string, a: boolean, b: boolean) =>\n    // organism-allow: literal-colour -- mask alpha stops (#000 = opaque), not paint\n    `linear-gradient(${dir}, ${a ? \"#000\" : \"transparent\"} 0, #000 ${fade}px, #000 calc(100% - ${fade}px), ${b ? \"#000\" : \"transparent\"} 100%)`;\n  const masks = [\n    overY && fade ? grad(\"to bottom\", atTop, atBottom) : null,\n    overX && fade ? grad(m.rtl ? \"to left\" : \"to right\", atStart, atEnd) : null,\n  ].filter(Boolean) as string[];\n  const mask = masks.length ? masks.join(\", \") : undefined;\n\n  return (\n    <div\n      ref={ref}\n      style={style}\n      data-slot=\"scroll-area\"\n      data-scrolling={active ? \"\" : undefined}\n      data-scrollbars={scrollbars}\n      className={cn(styles.root, classNames?.root, className)}\n    >\n      <div\n        ref={attachViewport}\n        data-slot=\"scroll-area-viewport\"\n        tabIndex={label ? 0 : undefined}\n        role={label ? \"region\" : undefined}\n        aria-label={label}\n        onScroll={(e) => {\n          place();\n          reach();\n          flash();\n          onScroll?.(e);\n        }}\n        className={cn(\n          styles.viewport,\n          y ? \"overflow-y-auto\" : \"overflow-y-hidden\",\n          x ? \"overflow-x-auto\" : \"overflow-x-hidden\",\n          classNames?.viewport,\n          viewportClassName,\n        )}\n        style={{\n          maxHeight,\n          scrollSnapType: snap,\n          maskImage: mask,\n          WebkitMaskImage: mask,\n          maskComposite: masks.length > 1 ? \"intersect\" : undefined,\n          ...viewportStyle,\n        }}\n      >\n        {children}\n      </div>\n      {overY && (\n        <Thumb\n          classNames={classNames}\n          rtl={m.rtl}\n          axis=\"y\"\n          size={m.ch}\n          content={m.sh}\n          view={view}\n          onUse={flash}\n          thumbRef={(n) => {\n            thumbs.current.y = n;\n          }}\n        />\n      )}\n      {overX && (\n        <Thumb\n          classNames={classNames}\n          rtl={m.rtl}\n          axis=\"x\"\n          size={m.cw}\n          content={m.sw}\n          view={view}\n          onUse={flash}\n          thumbRef={(n) => {\n            thumbs.current.x = n;\n          }}\n        />\n      )}\n      {jump && overY && (\n        <div\n          data-slot=\"scroll-area-jump\"\n          data-side={jump}\n          data-shown={far ? \"\" : undefined}\n          inert={!far}\n          className={styles.jump}\n        >\n          <Button\n            size=\"sm\"\n            variant=\"secondary\"\n            onClick={() => {\n              const el = view.current;\n              el?.scrollTo({\n                top: jump === \"start\" ? 0 : el.scrollHeight,\n                behavior: reducedMotion ? \"auto\" : \"smooth\",\n              });\n              el?.focus({ preventScroll: true });\n            }}\n          >\n            {jump === \"start\" ? <ArrowUp /> : <ArrowDown />}\n            {jumpLabel ?? (jump === \"start\" ? i18n(\"backToTheTop\") : i18n(\"backToTheEnd\"))}\n          </Button>\n        </div>\n      )}\n    </div>\n  );\n}\n\nfunction Thumb({\n  classNames,\n  rtl,\n  axis,\n  size,\n  content,\n  view,\n  onUse,\n  thumbRef,\n}: {\n  classNames?: ScrollAreaClassNames;\n  rtl: boolean;\n  axis: \"x\" | \"y\";\n  size: number;\n  content: number;\n  view: RefObject<HTMLDivElement | null>;\n  onUse: () => void;\n  /** The thumb element: the scroll area moves it as the view scrolls. */\n  thumbRef: (node: HTMLDivElement | null) => void;\n}) {\n  const trackRef = useRef<HTMLDivElement>(null);\n  const [track, setTrack] = useState(0);\n  useLayoutEffect(() => {\n    const element = trackRef.current;\n    if (!element) return;\n    const measure = () => setTrack(axis === \"x\" ? element.clientWidth : element.clientHeight);\n    measure();\n    const observer = new ResizeObserver(measure);\n    observer.observe(element);\n    return () => observer.disconnect();\n  }, [axis]);\n  const length = Math.min(track, Math.max(24, (size / content) * track));\n  const thumb = useRef<HTMLDivElement>(null);\n  const attachThumb = useComposedRef(thumb, thumbRef);\n  // the scroll when the thumb was taken, so Escape can put the view back\n  const from = useRef(0);\n  /** Where the view is scrolled now, read when a press needs it. */\n  const offset = () => (axis === \"y\" ? (view.current?.scrollTop ?? 0) : Math.abs(view.current?.scrollLeft ?? 0));\n  const ratio = (content - size) / Math.max(1, track - length);\n  const set = (v: number) => {\n    const el = view.current;\n    if (!el) return;\n    if (axis === \"y\") el.scrollTop = v;\n    else el.scrollLeft = rtl ? -v : v;\n  };\n  // the thumb on the shared drag: it scrolls while held, Escape or a lost pointer puts the view back\n  useDrag(\n    thumb,\n    {\n      onPress: (_, e) => {\n        e.preventDefault();\n        e.stopPropagation();\n        from.current = offset();\n      },\n      onMove: (p) => {\n        set(from.current + (axis === \"y\" ? p.dy : p.dx) * ratio * (axis === \"x\" && rtl ? -1 : 1));\n        onUse();\n      },\n      onCancel: () => set(from.current),\n    },\n    { axis: axis === \"y\" ? \"y\" : \"x\" },\n  );\n  return (\n    <div\n      aria-hidden\n      ref={trackRef}\n      data-slot=\"scroll-area-track\"\n      data-axis={axis}\n      className={cn(styles.track, classNames?.track)}\n      onPointerDown={(e) => {\n        if (e.target !== e.currentTarget) return;\n        const r = e.currentTarget.getBoundingClientRect();\n        const at = axis === \"y\" ? e.clientY - r.top : rtl ? r.right - e.clientX : e.clientX - r.left;\n        const from = offset();\n        const pos = content > size ? (from / (content - size)) * (track - length) : 0;\n        set(from + (at < pos ? -size : size) * 0.9);\n        onUse();\n      }}\n    >\n      <div\n        ref={attachThumb}\n        data-slot=\"scroll-area-thumb\"\n        className={cn(styles.thumb, classNames?.thumb)}\n        style={\n          axis === \"y\" ? { height: length } : { width: length, left: rtl ? undefined : 0, right: rtl ? 0 : undefined }\n        }\n      />\n    </div>\n  );\n}\n\nexport default ScrollArea;\n"},{"path":"beamline/components/spinner/defaults.ts","type":"registry:file","target":"src/ui/beamline/components/spinner/defaults.ts","content":"/** Pure allowed presentation defaults for Spinner; no component or runtime imports. */\nexport interface SpinnerDefaults {\n  /** Shared size setting; omit to inherit the surrounding scope or the component default. */\n  size?: \"sm\" | \"md\" | \"lg\";\n}\n"},{"path":"beamline/components/spinner/messages.ts","type":"registry:file","target":"src/ui/beamline/components/spinner/messages.ts","content":"import type { MessageDefinitions } from \"../../runtime/messages\";\n/** Built-in English copy; stable keys are the public translation API. */\nexport const english = {\n  label: \"Loading\",\n  done: \"Done\",\n  error: \"Failed\",\n} satisfies MessageDefinitions;\n"},{"path":"beamline/components/spinner/spinner.module.css","type":"registry:file","target":"src/ui/beamline/components/spinner/spinner.module.css","content":"@layer properties, theme, base, components, utilities;\n@layer components {\n  /* With a delay the ring waits unseen and then fades in, so quick work never flashes it; the result (a check or a\n     cross) always shows at once. */\n  .root[data-delay] {\n    animation: appear var(--pui-fade-in) var(--pui-ease-default) var(--_delay) both;\n  }\n  @keyframes appear {\n    from {\n      opacity: 0;\n    }\n  }\n  /* The turn runs on the compositor (a CSS animation on the svg box) and costs no JS per frame. When the work ends the\n     arc closes into a full ring over the standard duration, so stopping the turn is invisible, and the check or cross\n     draws itself a beat later. All timing comes from the motion tokens; the loop period follows --pui-motion-scale. */\n  .svg[data-state=\"loading\"] {\n    animation: turn calc(0.8s * var(--pui-motion-scale, 1) * var(--pui-motion-look, 1)) linear infinite;\n  }\n  .track {\n    stroke-opacity: 0.18;\n  }\n  .arc {\n    stroke-dasharray: 0.3 1;\n    transition: stroke-dasharray var(--pui-duration-standard) var(--pui-ease-enter);\n  }\n  .svg:not([data-state=\"loading\"]) .arc {\n    stroke-dasharray: 1 1;\n  }\n  .mark {\n    stroke-dasharray: 1 1;\n    animation: draw var(--pui-duration-standard) var(--pui-ease-enter) var(--pui-duration-fast) both;\n  }\n  @keyframes turn {\n    to {\n      transform: rotate(1turn);\n    }\n  }\n  @keyframes draw {\n    from {\n      stroke-dashoffset: 1;\n    }\n    to {\n      stroke-dashoffset: 0;\n    }\n  }\n  .svg[data-paused] {\n    animation-play-state: paused;\n  }\n  .svg[data-reduced],\n  .svg[data-reduced] .mark {\n    animation: none;\n  }\n  /* Reduction retains the loading/result shape without a decorative loop. */\n  @media (prefers-reduced-motion: reduce) {\n    .svg[data-state=\"loading\"],\n    .mark {\n      animation: none;\n    }\n  }\n}\n"},{"path":"beamline/components/spinner/spinner.tsx","type":"registry:file","target":"src/ui/beamline/components/spinner/spinner.tsx","content":"\"use client\";\n\nimport { useMessages } from \"../../runtime/localization\";\nimport { english as englishMessages } from \"./messages\";\nimport { useComponentDefaults } from \"../../runtime/appearance\";\nimport type { SpinnerDefaults } from \"./defaults\";\nexport type { SpinnerDefaults } from \"./defaults\";\n\nimport { useRef, type CSSProperties, type Ref } from \"react\";\nimport { useComposedRef } from \"../../hooks/use-composed-ref\";\nimport { useActive } from \"../../hooks/use-active\";\nimport { useMotionTokens } from \"../../hooks/use-motion-tokens\";\nimport { useReducedMotionSafe } from \"../../hooks/use-reduced-motion-safe\";\nimport { cn } from \"../../lib/utils\";\nimport styles from \"./spinner.module.css\";\n\nexport interface SpinnerClassNames {\n  /** Classes for the root part; no override by default. */\n  root?: string;\n  /** Classes for the svg part; no override by default. */\n  svg?: string;\n  /** Classes for the track part; no override by default. */\n  track?: string;\n  /** Classes for the arc part; no override by default. */\n  arc?: string;\n  /** Classes for the mark part; no override by default. */\n  mark?: string;\n}\n\nexport interface SpinnerProps {\n  /** `success` draws a check out of the ring, `error` a cross; both stop spinning. */\n  state?: \"loading\" | \"success\" | \"error\";\n  /** Control size within the supported size steps. Defaults to \"md\". */\n  size?: \"sm\" | \"md\" | \"lg\";\n  /** Accessible name while loading. */\n  label?: string;\n  /** ms to wait before it shows: work that ends sooner never flashes a spinner (about 300 is a good start). Default 0. */\n  delay?: number;\n  /** Classes on the documented visual root; no override by default. */\n  className?: string;\n  /** Receives the documented root element; no ref by default. */\n  ref?: Ref<HTMLSpanElement>;\n  /** Inline styles on the documented visual root; no inline overrides by default. */\n  style?: CSSProperties;\n  /** Classes for the named visual parts; no part overrides by default. */\n  classNames?: SpinnerClassNames;\n}\n\n/** Icon box from the foundation icon steps (§14.2): sm 14, md 16, lg 20. */\nconst PX = { sm: \"var(--pui-icon-sm)\", md: \"var(--pui-icon-md)\", lg: \"var(--pui-icon-lg)\" } as const;\n\n/**\n * A ring that spins while work runs and closes into a drawn check (or cross) when it ends — the result is a shape as\n * well as a colour. With reduced motion the loading ring holds still.\n */\nexport function Spinner({\n  state = \"loading\",\n  size: sizeProp,\n  label: labelProp,\n  delay = 0,\n  className,\n  classNames,\n  style,\n  ref,\n}: SpinnerProps) {\n  const i18n = useMessages(\"spinner\", englishMessages);\n  const label = labelProp === undefined ? i18n(\"label\") : labelProp;\n\n  const scopeDefaults = useComponentDefaults<SpinnerDefaults>(\"spinner\", [\"size\"]);\n  const size = sizeProp ?? scopeDefaults.size ?? \"md\";\n  const host = useRef<HTMLSpanElement>(null);\n  const attach = useComposedRef(host, ref);\n  const active = useActive(host);\n  const tokens = useMotionTokens(host);\n  const managedReduced = useReducedMotionSafe();\n  const reduced = tokens.reduced || managedReduced;\n\n  const box = PX[size];\n  const done = state !== \"loading\";\n  const tone = state === \"success\" ? \"text-green\" : state === \"error\" ? \"text-red\" : \"text-ink-2\";\n  return (\n    <span\n      ref={attach}\n      data-slot=\"spinner\"\n      data-state={state}\n      data-delay={delay > 0 && state === \"loading\" ? \"\" : undefined}\n      role={done ? \"img\" : \"status\"}\n      aria-label={state === \"success\" ? i18n(\"done\") : state === \"error\" ? i18n(\"error\") : label}\n      className={cn(styles.root, \"relative inline-grid shrink-0 place-items-center\", tone, classNames?.root, className)}\n      style={{ width: box, height: box, \"--_delay\": `${delay}ms`, ...style } as CSSProperties}\n    >\n      <svg\n        viewBox=\"0 0 24 24\"\n        width=\"100%\"\n        height=\"100%\"\n        fill=\"none\"\n        aria-hidden=\"true\"\n        data-state={state}\n        data-slot=\"spinner-svg\"\n        data-reduced={reduced ? \"\" : undefined}\n        data-paused={active ? undefined : \"\"}\n        className={cn(styles.svg, classNames?.svg)}\n      >\n        <circle\n          data-slot=\"spinner-track\"\n          className={cn(styles.track, classNames?.track)}\n          cx=\"12\"\n          cy=\"12\"\n          r=\"9.5\"\n          stroke=\"currentColor\"\n          strokeWidth=\"2.5\"\n        />\n        <circle\n          data-slot=\"spinner-arc\"\n          className={cn(styles.arc, classNames?.arc)}\n          cx=\"12\"\n          cy=\"12\"\n          r=\"9.5\"\n          pathLength={1}\n          stroke=\"currentColor\"\n          strokeWidth=\"2.5\"\n          strokeLinecap=\"round\"\n          transform=\"rotate(-90 12 12)\"\n        />\n        {state === \"success\" && (\n          <path\n            data-slot=\"spinner-mark\"\n            className={cn(styles.mark, classNames?.mark)}\n            d=\"M7.5 12.5l3 3 6-6.5\"\n            pathLength={1}\n            stroke=\"currentColor\"\n            strokeWidth=\"2.5\"\n            strokeLinecap=\"round\"\n            strokeLinejoin=\"round\"\n          />\n        )}\n        {state === \"error\" && (\n          <path\n            data-slot=\"spinner-mark\"\n            className={cn(styles.mark, classNames?.mark)}\n            d=\"M8.5 8.5l7 7M15.5 8.5l-7 7\"\n            pathLength={1}\n            stroke=\"currentColor\"\n            strokeWidth=\"2.5\"\n            strokeLinecap=\"round\"\n          />\n        )}\n      </svg>\n    </span>\n  );\n}\n\nexport default Spinner;\n"},{"path":"beamline/hooks/use-active.ts","type":"registry:file","target":"src/ui/beamline/hooks/use-active.ts","content":"\"use client\";\n\nimport { useContext, useEffect, useState, type RefObject } from \"react\";\n\nimport { ActivityContext } from \"../runtime/activity\";\n\n/**\n * Whether an animated element should be doing work: it is (nearly) on screen and the tab is visible. Every\n * continuously animated component gates its loop, shader or CSS animation on this, so an effect scrolled out of view,\n * behind another tab, or in a collapsed panel costs nothing. One IntersectionObserver per element; no polling.\n */\nexport function useActive(\n  ref: RefObject<Element | null>,\n  {\n    margin = \"120px\",\n    key,\n    idle = true,\n  }: {\n    margin?: string;\n    /** Re-attach when this changes (an element that mounts later). */\n    key?: unknown;\n    /** Pause continuous work at the host idle boundary. Finite sequences set false so they finish. */\n    idle?: boolean;\n  } = {},\n) {\n  const active = useContext(ActivityContext);\n  const [inView, setInView] = useState(false);\n  const [visible, setVisible] = useState(\n    () => typeof document === \"undefined\" || document.visibilityState === \"visible\",\n  );\n  useEffect(() => {\n    const el = ref.current;\n    if (!el || typeof IntersectionObserver === \"undefined\") {\n      setInView(true);\n      return;\n    }\n    const io = new IntersectionObserver(([e]) => setInView(e.isIntersecting), { rootMargin: margin });\n    io.observe(el);\n    return () => io.disconnect();\n  }, [ref, margin, key]);\n  useEffect(() => {\n    const on = () => setVisible(document.visibilityState === \"visible\");\n    document.addEventListener(\"visibilitychange\", on);\n    return () => document.removeEventListener(\"visibilitychange\", on);\n  }, []);\n  return (!idle || active) && inView && visible;\n}\n"},{"path":"beamline/hooks/use-composed-ref.ts","type":"registry:file","target":"src/ui/beamline/hooks/use-composed-ref.ts","content":"\"use client\";\n\nimport { useCallback, type Ref, type RefObject } from \"react\";\n\n/** Keep a control's measurement/focus ref and the caller's ref, including React 19 callback cleanup. */\nexport function useComposedRef<T>(internal: RefObject<T | null>, external?: Ref<T>) {\n  return useCallback(\n    (node: T | null) => {\n      internal.current = node;\n      if (typeof external === \"function\") {\n        const cleanup = external(node);\n        if (typeof cleanup === \"function\")\n          return () => {\n            internal.current = null;\n            cleanup();\n          };\n      } else if (external) external.current = node;\n    },\n    [internal, external],\n  );\n}\n"},{"path":"beamline/hooks/use-drag.ts","type":"registry:file","target":"src/ui/beamline/hooks/use-drag.ts","content":"\"use client\";\n\nimport { useEffect, useRef, useState, type RefObject } from \"react\";\nimport { VelocityTracker } from \"../lib/gesture\";\n\n/** Where the pointer is during a drag, relative to where it was pressed, with its velocity (px/s) over the last 100 ms. */\nexport interface DragPoint {\n  /** Pointer position in client coordinates. */\n  x: number;\n  y: number;\n  /** Distance from the press. */\n  dx: number;\n  dy: number;\n  /** Velocity in px/s (read from the last 100 ms, so a release carries the flick, not the whole drag). */\n  vx: number;\n  vy: number;\n  pointerType: string;\n  /** Shift was held (a part may offer a second mode on it: move one task alone, a finer step). */\n  shift: boolean;\n}\n\nexport interface DragHandlers {\n  /** A press landed on the element. Return false to leave it alone (a press on a nested button or link). */\n  onPress?: (point: DragPoint, event: PointerEvent) => boolean | void;\n  /** The pointer moved past the threshold: the drag begins (the press point is in `point.x - point.dx`). */\n  onStart?: (point: DragPoint) => void;\n  /** The pointer moved during a drag. `event` is the browser's own, for what a point does not carry: a pen's pressure,\n   *  the coalesced samples a fast stroke packs into one event (a drawing surface). */\n  onMove?: (point: DragPoint, event: PointerEvent) => void;\n  /** Released after a drag, with the release velocity. */\n  onEnd?: (point: DragPoint) => void;\n  /** Released without moving past the threshold: a tap or click (the part's tap route, WCAG 2.5.7). */\n  onTap?: (point: DragPoint) => void;\n  /** Escape, a lost pointer or the browser taking the gesture (a page scroll): put things back as they were. */\n  onCancel?: () => void;\n  /** A press that ended as neither a drag nor a tap: a finger that went on to scroll the page, or a pointer the browser\n   *  took before the threshold. Undo whatever `onPress` prepared. */\n  onAbandon?: () => void;\n}\n\nexport interface DragOptions {\n  /** The axis the part moves on. On touch, a drag that starts mostly across it is left to the page (a scroll). */\n  axis?: \"x\" | \"y\" | \"both\";\n  /** Pixels before a press becomes a drag: 3 for a mouse, 8 for a finger or pen unless given. */\n  threshold?: number;\n  disabled?: boolean;\n}\n\n/**\n * The pointer side of a hand on a part, shared by everything dragged, thrown or pulled (a thumb, a puck, a stub, a\n * task, a cable). It listens natively on the element, so moves never render React: the part writes positions in its\n * handlers (a spring, a transform, a custom property) and only `dragging`, which changes at the start and end, is\n * state (for `data-state`).\n *\n * A press becomes a drag past a small threshold, then the pointer is captured so the drag continues outside the\n * element; a release without moving is a tap (`onTap`), the route every drag needs for people who cannot drag. Escape,\n * `pointercancel` and a lost capture call `onCancel`, and the part restores what it showed before the press. On touch the\n * element needs a `touch-action` that leaves the other axis to the page (`pan-y` for a part dragged sideways; never\n * `none` on more than the dragged surface, which would block zoom), and a drag that starts across its axis is dropped\n * so the page can scroll.\n */\nexport function useDrag<T extends HTMLElement | SVGElement>(\n  ref: RefObject<T | null>,\n  handlers: DragHandlers,\n  { axis = \"both\", threshold, disabled = false }: DragOptions = {},\n): { dragging: boolean } {\n  const [dragging, setDragging] = useState(false);\n  const latest = useRef(handlers);\n  latest.current = handlers;\n\n  useEffect(() => {\n    // an SVG part (a chart's brush) is dragged the same way; its pointer events are typed as an HTML element's\n    const el = ref.current as HTMLElement | null;\n    if (!el || disabled) return;\n    const doc = el.ownerDocument;\n    // Escape during a drag belongs to the drag: listened on the window's capture phase, it runs before any dialog or\n    // popover listening on the document, which would otherwise also close around the cancelled drag\n    const win = doc.defaultView ?? window;\n    let active: {\n      id: number;\n      x0: number;\n      y0: number;\n      type: string;\n      started: boolean;\n      tracker: VelocityTracker;\n    } | null = null;\n\n    const point = (e: PointerEvent): DragPoint => {\n      const a = active!;\n      const [vx, vy] = a.tracker.velocity(e.timeStamp);\n      return {\n        x: e.clientX,\n        y: e.clientY,\n        dx: e.clientX - a.x0,\n        dy: e.clientY - a.y0,\n        vx,\n        vy,\n        pointerType: e.pointerType,\n        shift: e.shiftKey,\n      };\n    };\n\n    const finish = () => {\n      if (active?.started && el.hasPointerCapture?.(active.id)) el.releasePointerCapture(active.id);\n      active = null;\n      doc.removeEventListener(\"pointermove\", move);\n      doc.removeEventListener(\"pointerup\", up);\n      doc.removeEventListener(\"pointercancel\", cancel);\n      win.removeEventListener(\"keydown\", key, true);\n      doc.removeEventListener(\"selectstart\", hold, true);\n      doc.removeEventListener(\"dragstart\", hold, true);\n      el.removeEventListener(\"lostpointercapture\", lost);\n      setDragging(false);\n    };\n\n    const cancel = () => {\n      if (!active) return;\n      const started = active.started;\n      finish();\n      if (started) latest.current.onCancel?.();\n      else latest.current.onAbandon?.();\n    };\n\n    // only the part's own capture ending cancels: a finger's press is captured by the child it landed on, and moving\n    // the capture to the part fires lostpointercapture on that child, which bubbles here\n    const lost = (e: PointerEvent) => {\n      if (e.target === el && active?.started && e.pointerId === active.id) cancel();\n    };\n\n    const key = (e: KeyboardEvent) => {\n      if (e.key !== \"Escape\" || !active?.started) return;\n      e.preventDefault();\n      e.stopImmediatePropagation();\n      cancel();\n    };\n\n    // while the hand holds the part, the page neither selects text nor starts its own drag and drop (a selection left\n    // by an earlier drag would otherwise be dragged, and the browser cancels the pointer)\n    const hold = (e: Event) => e.preventDefault();\n\n    const move = (e: PointerEvent) => {\n      if (!active || e.pointerId !== active.id) return;\n      active.tracker.add(e.timeStamp, e.clientX, e.clientY);\n      const p = point(e);\n      if (!active.started) {\n        const limit = threshold ?? (active.type === \"mouse\" ? 3 : 8);\n        if (Math.hypot(p.dx, p.dy) < limit) return;\n        // a finger that starts across the part's axis is scrolling the page\n        const across = axis === \"x\" ? Math.abs(p.dy) > Math.abs(p.dx) : axis === \"y\" && Math.abs(p.dx) > Math.abs(p.dy);\n        if (active.type !== \"mouse\" && across) {\n          finish();\n          latest.current.onAbandon?.();\n          return;\n        }\n        active.started = true;\n        doc.getSelection()?.removeAllRanges();\n        el.setPointerCapture?.(active.id);\n        el.addEventListener(\"lostpointercapture\", lost);\n        setDragging(true);\n        latest.current.onStart?.(p);\n      }\n      latest.current.onMove?.(p, e);\n    };\n\n    const up = (e: PointerEvent) => {\n      if (!active || e.pointerId !== active.id) return;\n      active.tracker.add(e.timeStamp, e.clientX, e.clientY);\n      const p = point(e);\n      const started = active.started;\n      finish();\n      if (started) latest.current.onEnd?.(p);\n      else latest.current.onTap?.(p);\n    };\n\n    const down = (e: PointerEvent) => {\n      if (active || !e.isPrimary || (e.pointerType === \"mouse\" && e.button !== 0)) return;\n      const tracker = new VelocityTracker();\n      tracker.add(e.timeStamp, e.clientX, e.clientY);\n      active = { id: e.pointerId, x0: e.clientX, y0: e.clientY, type: e.pointerType, started: false, tracker };\n      if (latest.current.onPress?.(point(e), e) === false) {\n        active = null;\n        return;\n      }\n      doc.addEventListener(\"pointermove\", move);\n      doc.addEventListener(\"pointerup\", up);\n      doc.addEventListener(\"pointercancel\", cancel);\n      win.addEventListener(\"keydown\", key, true);\n      doc.addEventListener(\"selectstart\", hold, true);\n      doc.addEventListener(\"dragstart\", hold, true);\n    };\n\n    el.addEventListener(\"pointerdown\", down);\n    return () => {\n      el.removeEventListener(\"pointerdown\", down);\n      if (active) finish();\n    };\n  }, [ref, axis, threshold, disabled]);\n\n  return { dragging };\n}\n"},{"path":"beamline/hooks/use-expiring.ts","type":"registry:file","target":"src/ui/beamline/hooks/use-expiring.ts","content":"\"use client\";\n\nimport { useCallback, useEffect, useRef, useState, type SetStateAction } from \"react\";\n\n/**\n * A value that clears itself: a \"Saved\" note, a hint after a short press, a row lit after a jump, an undo offer. Each\n * set shows the value and restarts the countdown (a second nudge keeps it up `ms` from the last one, not the first);\n * after `ms`, or `forMs` for this one set, it is null again. Setting null clears it at once.\n */\nexport function useExpiring<T>(ms: number) {\n  const [value, setValue] = useState<T | null>(null);\n  const timer = useRef<ReturnType<typeof setTimeout>>(undefined);\n  useEffect(() => () => clearTimeout(timer.current), []);\n  const set = useCallback(\n    (next: SetStateAction<T | null>, forMs = ms) => {\n      clearTimeout(timer.current);\n      setValue(next);\n      if (next !== null) timer.current = setTimeout(() => setValue(null), forMs);\n    },\n    [ms],\n  );\n  return [value, set] as const;\n}\n"},{"path":"beamline/hooks/use-media-query.ts","type":"registry:file","target":"src/ui/beamline/hooks/use-media-query.ts","content":"\"use client\";\n\nimport { useSyncExternalStore } from \"react\";\n\n// one MediaQueryList per query: React reads the snapshot on every render, and a part that renders thirty times a\n// second (a playing audio player's clock) would otherwise ask the browser for a new list each time\nconst lists = new Map<string, MediaQueryList>();\nconst list = (query: string) => {\n  if (typeof window === \"undefined\" || typeof window.matchMedia !== \"function\") return undefined;\n  let m = lists.get(query);\n  if (!m) lists.set(query, (m = window.matchMedia(query)));\n  return m;\n};\n\n/** True while the media query matches; false on the server and in the first client render of SSR output. */\nexport function useMediaQuery(query: string): boolean {\n  return useSyncExternalStore(\n    (notify) => {\n      const m = list(query);\n      m?.addEventListener(\"change\", notify);\n      return () => m?.removeEventListener(\"change\", notify);\n    },\n    () => list(query)?.matches ?? false,\n    () => false,\n  );\n}\n\n/** Phone-width layouts: below 768px. */\nexport const usePhone = () => useMediaQuery(\"(max-width: 767px)\");\n"},{"path":"beamline/hooks/use-motion-tokens.ts","type":"registry:file","target":"src/ui/beamline/hooks/use-motion-tokens.ts","content":"\"use client\";\n\nimport { useMemo, type RefObject } from \"react\";\nimport { useAppearanceRoot } from \"../runtime/appearance\";\nimport { useResolvedAppearance } from \"./use-resolved-appearance\";\nimport { motionAt, motionEase, motionTokens, type MotionTokens } from \"../lib/motion-tokens\";\nimport { semanticMotion } from \"../lib/motion-source\";\n\nconst durationToken = (name: string) =>\n  name === \"exit\" ? \"motion-out\" : name === \"in\" || name === \"out\" ? `motion-${name}` : `duration-${name}`;\nconst easeToken = (name: string) => `ease-${name === \"inOut\" ? \"in-out\" : name}`;\nconst REQUEST = {\n  times: [\n    ...Object.keys(semanticMotion.duration).map(durationToken),\n    ...Object.keys(semanticMotion.spring).map((name) => `spring-${name}`),\n    ...Object.keys(semanticMotion.stagger).map((name) => `stagger-${name}`),\n    \"fade-in\",\n    \"fade-out\",\n  ],\n  easings: [...Object.keys(semanticMotion.ease).map(easeToken), \"ease-spring\", \"ease-spring-bounce\", \"ease-overshoot\"],\n  numbers: [\"motion-scale\", \"motion-look\", \"press-scale\"],\n  // timing only: the host's own type would make every control resolve differently from the page around it\n  typography: false,\n};\n\n/**\n * Resolve each timing at the actual host; omitted host uses the nearest managed root. The first/server snapshot is\n * the pure foundation default. Local CSS values, scope changes, font readiness, OS preference and explicit refresh\n * update the same consumer; no document-wide first-root fallback or persistent global listener.\n */\nexport function useMotionTokens(hostRef?: RefObject<HTMLElement | null>): MotionTokens & {\n  ready: boolean;\n  /** Reduced or none: movement, springs and staggers are instant. */\n  reduced: boolean;\n  mode: \"full\" | \"reduced\" | \"none\";\n  /** Opacity-only arrival and departure (seconds): kept under reduced, instant under none (APPEARANCE A06). */\n  fade: { in: number; out: number };\n} {\n  const root = useAppearanceRoot();\n  const scopeRef = useMemo(() => ({ current: root }), [root]);\n  const resolved = useResolvedAppearance(hostRef ?? scopeRef, REQUEST);\n  return useMemo(() => {\n    if (!resolved.ready)\n      return {\n        ...motionTokens,\n        ready: false,\n        reduced: false,\n        mode: \"full\" as const,\n        fade: { in: motionTokens.duration.in, out: motionTokens.duration.out },\n      };\n    const reduced = resolved.reducedMotion;\n    const speed = (resolved.numbers[\"motion-scale\"] ?? 1) * (resolved.numbers[\"motion-look\"] ?? 1);\n    const fade =\n      resolved.motionMode === \"none\"\n        ? { in: 0.001, out: 0.001 }\n        : {\n            in: resolved.times[\"fade-in\"] ?? semanticMotion.duration.in * speed,\n            out: resolved.times[\"fade-out\"] ?? semanticMotion.duration.out * speed,\n          };\n    const factor = reduced ? 0.001 / semanticMotion.duration.standard : speed;\n    const base = motionAt(factor);\n    const duration = Object.fromEntries(\n      Object.entries(base.duration).map(([name, fallback]) => [\n        name,\n        reduced ? 0.001 : (resolved.times[durationToken(name)] ?? fallback),\n      ]),\n    ) as MotionTokens[\"duration\"];\n    const stagger = Object.fromEntries(\n      Object.entries(base.stagger).map(([name, fallback]) => [\n        name,\n        reduced ? 0 : (resolved.times[`stagger-${name}`] ?? fallback),\n      ]),\n    ) as MotionTokens[\"stagger\"];\n    const ease = Object.fromEntries(\n      Object.entries(base.ease).map(([name, fallback]) => [\n        name,\n        motionEase(resolved.easings[easeToken(name)], fallback),\n      ]),\n    ) as MotionTokens[\"ease\"];\n    const spring = { ...base.spring };\n    for (const name of Object.keys(semanticMotion.spring) as (keyof typeof semanticMotion.spring)[])\n      spring[name] = {\n        ...base.spring[name],\n        visualDuration: reduced ? 0.001 : (resolved.times[`spring-${name}`] ?? base.spring[name].visualDuration),\n        bounce: reduced ? 0 : base.spring[name].bounce,\n      };\n    return {\n      ...base,\n      ready: true,\n      reduced,\n      mode: resolved.motionMode,\n      fade,\n      duration,\n      stagger,\n      ease,\n      spring,\n      pressScale: resolved.numbers[\"press-scale\"] ?? base.pressScale,\n      css: {\n        spring: resolved.easings[\"ease-spring\"] ?? base.css.spring,\n        springBounce: resolved.easings[\"ease-spring-bounce\"] ?? base.css.springBounce,\n        overshoot: resolved.easings[\"ease-overshoot\"] ?? base.css.overshoot,\n      },\n    };\n  }, [resolved]);\n}\n"},{"path":"beamline/hooks/use-reduced-motion-safe.ts","type":"registry:file","target":"src/ui/beamline/hooks/use-reduced-motion-safe.ts","content":"\"use client\";\n\nimport { useMediaQuery } from \"./use-media-query\";\nimport { useScopeMotion } from \"../runtime/appearance\";\n\n/** Managed motion policy plus the OS preference, with a stable server snapshot. */\nexport function useReducedMotionSafe() {\n  const requested = useScopeMotion();\n  const os = useMediaQuery(\"(prefers-reduced-motion: reduce)\");\n  return requested !== \"auto\" || os;\n}\n"},{"path":"beamline/lib/gesture.ts","type":"registry:file","target":"src/ui/beamline/lib/gesture.ts","content":"import { readMotionFactor } from \"./motion-tokens\";\n\n/**\n * The arithmetic of a hand on a part, shared by every part that is dragged, thrown or pulled (useDrag is the pointer\n * side). Three pieces, each from how real interfaces feel (Apple, \"Designing Fluid Interfaces\", WWDC 2018):\n *\n * - velocity: read from the last ~100 ms of movement, so the release carries the speed of the flick, not of the whole drag;\n * - projection: where a thrown thing would come to rest if it slid on with the look's carry (`project`), so a part\n *   can decide on release (the nearest value, step or preset to that point) instead of after an animation;\n * - give: past a limit the part follows the hand less and less (`rubberband`) instead of stopping dead, and springs back.\n *\n * How much a part carries and gives is the look's material, read once per gesture from the element (`readHand`):\n * `--m-hand-carry`, `--m-hand-give` and `--m-hand-bounce` (preset-source.css), with `--m-morph-weight` scaling how\n * long things take to settle (times a motion token's duration, which carries the speed setting). Reduced motion\n * carries nothing, gives nothing and never bounces.\n */\n\nexport interface Hand {\n  /** How far a release carries: 0 stops where the hand let go, 1 slides on freely (see `project`). */\n  carry: number;\n  /** How much a part follows the hand past a limit: 0 is a hard stop, 0.55 a phone's rubber band. */\n  give: number;\n  /** Bounce of a released held object (0 critically damped). Only for what the pointer held. */\n  bounce: number;\n  /** The look's weight (`--m-morph-weight`): multiply a motion token's duration by it. The token already carries the\n   *  speed setting, so the weight never does. */\n  weight: number;\n  /** Reduced or no motion: land at once. */\n  reduced: boolean;\n}\n\n/** The hand the defaults describe; also what a server or a test without styles gets. */\nexport const DEFAULT_HAND: Hand = { carry: 0.8, give: 0.45, bounce: 0.14, weight: 1, reduced: false };\n\nconst num = (style: CSSStyleDeclaration, name: string, fallback: number) => {\n  const v = Number.parseFloat(style.getPropertyValue(name));\n  return Number.isFinite(v) ? v : fallback;\n};\n\n/** The look's physics at `el`, read once at the start of a gesture (never per frame). */\nexport function readHand(el: Element | null | undefined): Hand {\n  if (!el || typeof getComputedStyle === \"undefined\") return DEFAULT_HAND;\n  const style = getComputedStyle(el);\n  const factor = readMotionFactor(el);\n  // the motion factor is ~0.005 under reduced motion and 1 at the foundation default\n  const reduced = factor < 0.05;\n  if (reduced) return { carry: 0, give: 0, bounce: 0, weight: 1, reduced: true };\n  return {\n    carry: num(style, \"--m-hand-carry\", DEFAULT_HAND.carry),\n    give: num(style, \"--m-hand-give\", DEFAULT_HAND.give),\n    bounce: num(style, \"--m-hand-bounce\", DEFAULT_HAND.bounce),\n    weight: num(style, \"--m-morph-weight\", 1),\n    reduced: false,\n  };\n}\n\n/** Samples of a pointer's path, kept for the last `window` ms, to read its velocity at release. */\nexport class VelocityTracker {\n  private samples: { t: number; x: number; y: number }[] = [];\n  // a declared field, not a parameter property: shipped source must also compile under erasableSyntaxOnly (Vite's\n  // TypeScript template turns it on), where TypeScript-only syntax with runtime meaning is refused\n  private readonly window: number;\n  constructor(window = 100) {\n    this.window = window;\n  }\n\n  add(t: number, x: number, y: number) {\n    this.samples.push({ t, x, y });\n    const from = t - this.window;\n    while (this.samples.length > 2 && this.samples[0].t < from) this.samples.shift();\n  }\n\n  /** Units per second over the kept window; 0 when the hand stopped before letting go (a pause of more than the window). */\n  velocity(now = this.samples.at(-1)?.t ?? 0): [number, number] {\n    const s = this.samples.filter((p) => p.t >= now - this.window);\n    if (s.length < 2) return [0, 0];\n    // least squares slope over the window: one jittery last sample does not decide the throw\n    const n = s.length;\n    const mt = s.reduce((a, p) => a + p.t, 0) / n;\n    const mx = s.reduce((a, p) => a + p.x, 0) / n;\n    const my = s.reduce((a, p) => a + p.y, 0) / n;\n    let tt = 0;\n    let tx = 0;\n    let ty = 0;\n    for (const p of s) {\n      tt += (p.t - mt) ** 2;\n      tx += (p.t - mt) * (p.x - mx);\n      ty += (p.t - mt) * (p.y - my);\n    }\n    if (tt === 0) return [0, 0];\n    return [(tx / tt) * 1000, (ty / tt) * 1000];\n  }\n\n  reset() {\n    this.samples = [];\n  }\n}\n\n/**\n * How far something released at `velocity` (units/s) slides before friction stops it, with the look's carry. `rate` is\n * the speed kept per millisecond: 0.99 (the default) suits controls on a short scale (a thumb, a puck, a cut), where a\n * flick should carry a little way; 0.998 is a phone list's deceleration, for long scrolling content.\n */\nexport function project(velocity: number, carry: number, rate = 0.99): number {\n  if (carry <= 0) return 0;\n  return (((velocity / 1000) * rate) / (1 - rate)) * carry;\n}\n\n/**\n * Where a part drawn `overshoot` units past its limit sits, given the room `extent` it moves in: it follows less and\n * less the further it goes and never reaches `extent`. `give` 0 is a hard stop.\n */\nexport function rubberband(overshoot: number, extent: number, give: number): number {\n  if (give <= 0 || extent <= 0) return 0;\n  const sign = Math.sign(overshoot);\n  const x = Math.abs(overshoot);\n  return sign * (1 - 1 / ((x * give) / extent + 1)) * extent;\n}\n\n/** `value` held inside [min, max], with the part's give past either end. */\nexport function within(value: number, min: number, max: number, extent: number, give: number): number {\n  if (value < min) return min + rubberband(value - min, extent, give);\n  if (value > max) return max + rubberband(value - max, extent, give);\n  return value;\n}\n\n/** The nearest of `stops` to `value` (a projected landing point picks its step or preset this way). */\nexport function nearest(value: number, stops: readonly number[]): number {\n  let best = stops[0];\n  for (const s of stops) if (Math.abs(s - value) < Math.abs(best - value)) best = s;\n  return best;\n}\n"},{"path":"beamline/lib/utils.ts","type":"registry:file","target":"src/ui/beamline/lib/utils.ts","content":"import { clsx, type ClassValue } from \"clsx\";\nimport { extendTailwindMerge } from \"tailwind-merge\";\n\n/* The type roles (utilities.css) and the 2xs step are sizes, not text colours: without this, tailwind-merge reads\n   `text-overline` as a colour and drops it next to `text-ink-3`. A role and a size step still replace each other.\n   Likewise `font-title` is the look's title weight, not a family: read as a family it dropped `font-display` beside it,\n   and every merged page title lost the look's display face. */\nconst twMerge = extendTailwindMerge({\n  extend: {\n    classGroups: {\n      \"font-weight\": [{ font: [\"title\"] }],\n      \"font-family\": [{ font: [\"display\", \"numeric\", \"figure\"] }],\n      \"font-size\": [\n        {\n          text: [\n            \"2xs\",\n            \"display\",\n            \"title\",\n            \"heading\",\n            \"subheading\",\n            \"body\",\n            \"body-sm\",\n            \"reading\",\n            \"label\",\n            \"caption\",\n            \"overline\",\n            \"numeric\",\n            \"code\",\n          ],\n        },\n      ],\n    },\n  },\n});\n\n/** Merge class names, letting later Tailwind utilities win over earlier ones. */\nexport function cn(...inputs: ClassValue[]) {\n  return twMerge(clsx(inputs));\n}\n\n/** A small seeded random generator (LCG): the same seed gives the same sequence, for stable sample data and jitter. */\nexport function rng(seed = 1) {\n  let s = seed >>> 0 || 1;\n  return () => (s = (s * 1664525 + 1013904223) >>> 0) / 2 ** 32;\n}\n\nexport const clamp = (value: number, min: number, max: number) => Math.min(max, Math.max(min, value));\n"}],"docs":"Scroll area is in src/ui/beamline/components/scroll-area/scroll-area.tsx. The source is in src/ui/beamline (ui/beamline in a project without src/). After Tailwind, import its styles/beamline.css once, then styles/look-prism.css in your app stylesheet (use relative paths). Keep the shared base before all chosen looks. Wrap your app in <UIRoot preset={prism}> with UIRoot from its runtime/appearance and prism from its looks/prism.  shadcn replaces files when asked; use the Beamline managed-source CLI from the start for three-way upgrades that preserve edits.","meta":{"free":true,"version":"0.2.0-rc.42","library":"https://beamline.io/components/scroll-area"}}