chore: import upstream snapshot with attribution

apps/sim/components/ui/button.tsx

@@ -0,0 +1,49 @@
+import * as React from 'react'
+import { Slot } from '@radix-ui/react-slot'
+import { cn } from '@sim/emcn'
+import { cva, type VariantProps } from 'class-variance-authority'
+
+const buttonVariants = cva(
+  'inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium ring-offset-background transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0',
+  {
+    variants: {
+      variant: {
+        default: 'bg-primary text-primary-foreground hover-hover:bg-primary/90',
+        destructive: 'bg-destructive text-destructive-foreground hover-hover:bg-destructive/90',
+        outline:
+          'border border-input bg-background hover-hover:bg-accent hover-hover:text-accent-foreground',
+        secondary: 'bg-secondary text-secondary-foreground hover-hover:bg-secondary/80',
+        ghost: 'hover-hover:bg-accent hover-hover:text-accent-foreground',
+        link: 'text-primary underline-offset-4 hover-hover:underline',
+      },
+      size: {
+        default: 'h-10 px-4 py-2',
+        sm: 'h-9 rounded-md px-3',
+        lg: 'h-11 rounded-md px-8',
+        icon: 'h-10 w-10',
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+      size: 'default',
+    },
+  }
+)
+
+interface ButtonProps
+  extends React.ButtonHTMLAttributes<HTMLButtonElement>,
+    VariantProps<typeof buttonVariants> {
+  asChild?: boolean
+}
+
+const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
+  ({ className, variant, size, asChild = false, ...props }, ref) => {
+    const Comp = asChild ? Slot : 'button'
+    return (
+      <Comp className={cn(buttonVariants({ variant, size, className }))} ref={ref} {...props} />
+    )
+  }
+)
+Button.displayName = 'Button'
+
+export { Button, buttonVariants }

apps/sim/components/ui/generated-password-input.tsx

@@ -0,0 +1,118 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { Button, ChipInput, Tooltip } from '@sim/emcn'
+import { Check, Clipboard, Eye, EyeOff, RefreshCw } from 'lucide-react'
+import { generatePassword } from '@/lib/core/security/encryption'
+
+interface GeneratedPasswordInputProps {
+  value: string
+  onChange: (value: string) => void
+  disabled?: boolean
+  placeholder?: string
+  /** Show the Generate (random password) action. Off for consumer-facing entry forms. */
+  showGenerate?: boolean
+  required?: boolean
+  autoComplete?: string
+  error?: boolean
+}
+
+/**
+ * Password field with reveal / copy / (optional) generate adornments, used by the
+ * deploy-as-chat access controls and the file-share modal. Owns its show/copy UI
+ * state; the caller owns the value.
+ */
+export function GeneratedPasswordInput({
+  value,
+  onChange,
+  disabled = false,
+  placeholder,
+  showGenerate = true,
+  required = false,
+  autoComplete = 'new-password',
+  error = false,
+}: GeneratedPasswordInputProps) {
+  const [showPassword, setShowPassword] = useState(false)
+  const [copySuccess, setCopySuccess] = useState(false)
+
+  useEffect(() => {
+    if (!copySuccess) return
+    const timer = setTimeout(() => setCopySuccess(false), 2000)
+    return () => clearTimeout(timer)
+  }, [copySuccess])
+
+  const copyToClipboard = () => {
+    navigator.clipboard.writeText(value)
+    setCopySuccess(true)
+  }
+
+  return (
+    <ChipInput
+      type={showPassword ? 'text' : 'password'}
+      placeholder={placeholder}
+      value={value}
+      onChange={(e) => onChange(e.target.value)}
+      disabled={disabled}
+      required={required}
+      autoComplete={autoComplete}
+      error={error}
+      endAdornment={
+        <div className='flex items-center'>
+          {showGenerate ? (
+            <Tooltip.Root>
+              <Tooltip.Trigger asChild>
+                <Button
+                  type='button'
+                  variant='ghost'
+                  onClick={() => onChange(generatePassword(24))}
+                  disabled={disabled}
+                  aria-label='Generate password'
+                  className='!p-1.5'
+                >
+                  <RefreshCw className='size-3' />
+                </Button>
+              </Tooltip.Trigger>
+              <Tooltip.Content>
+                <span>Generate</span>
+              </Tooltip.Content>
+            </Tooltip.Root>
+          ) : null}
+          <Tooltip.Root>
+            <Tooltip.Trigger asChild>
+              <Button
+                type='button'
+                variant='ghost'
+                onClick={copyToClipboard}
+                disabled={!value || disabled}
+                aria-label='Copy password'
+                className='!p-1.5'
+              >
+                {copySuccess ? <Check className='size-3' /> : <Clipboard className='size-3' />}
+              </Button>
+            </Tooltip.Trigger>
+            <Tooltip.Content>
+              <span>{copySuccess ? 'Copied' : 'Copy'}</span>
+            </Tooltip.Content>
+          </Tooltip.Root>
+          <Tooltip.Root>
+            <Tooltip.Trigger asChild>
+              <Button
+                type='button'
+                variant='ghost'
+                onClick={() => setShowPassword(!showPassword)}
+                disabled={disabled}
+                aria-label={showPassword ? 'Hide password' : 'Show password'}
+                className='!p-1.5'
+              >
+                {showPassword ? <EyeOff className='size-3' /> : <Eye className='size-3' />}
+              </Button>
+            </Tooltip.Trigger>
+            <Tooltip.Content>
+              <span>{showPassword ? 'Hide' : 'Show'}</span>
+            </Tooltip.Content>
+          </Tooltip.Root>
+        </div>
+      }
+    />
+  )
+}

apps/sim/components/ui/index.ts

@@ -0,0 +1,18 @@
+export { Button, buttonVariants } from './button'
+export { GeneratedPasswordInput } from './generated-password-input'
+export { Progress } from './progress'
+export { SearchHighlight } from './search-highlight'
+export {
+  Select,
+  SelectContent,
+  SelectGroup,
+  SelectItem,
+  SelectLabel,
+  SelectScrollDownButton,
+  SelectScrollUpButton,
+  SelectSeparator,
+  SelectTrigger,
+  SelectValue,
+} from './select'
+export { ShimmerText } from './shimmer-text'
+export { ThinkingLoader, type ThinkingLoaderVariant } from './thinking-loader'

apps/sim/components/ui/progress.tsx

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+'use client'
+
+import * as React from 'react'
+import * as ProgressPrimitive from '@radix-ui/react-progress'
+import { cn } from '@sim/emcn'
+
+interface ProgressProps extends React.ComponentPropsWithoutRef<typeof ProgressPrimitive.Root> {
+  indicatorClassName?: string
+}
+
+const Progress = React.forwardRef<React.ElementRef<typeof ProgressPrimitive.Root>, ProgressProps>(
+  ({ className, value, indicatorClassName, ...props }, ref) => (
+    <ProgressPrimitive.Root
+      ref={ref}
+      className={cn('relative h-2 w-full overflow-hidden rounded-full bg-muted', className)}
+      {...props}
+    >
+      <ProgressPrimitive.Indicator
+        className={cn(
+          'h-full w-full flex-1 bg-primary transition-all dark:bg-white',
+          indicatorClassName
+        )}
+        style={{ transform: `translateX(-${100 - (value || 0)}%)` }}
+      />
+    </ProgressPrimitive.Root>
+  )
+)
+Progress.displayName = ProgressPrimitive.Root.displayName
+
+export { Progress }

apps/sim/components/ui/search-highlight.tsx

@@ -0,0 +1,45 @@
+interface SearchHighlightProps {
+  text: string
+  searchQuery: string
+  className?: string
+}
+
+export function SearchHighlight({ text, searchQuery, className = '' }: SearchHighlightProps) {
+  if (!searchQuery.trim()) {
+    return <span className={className}>{text}</span>
+  }
+
+  const searchTerms = searchQuery
+    .trim()
+    .split(/\s+/)
+    .filter((term) => term.length > 0)
+    .map((term) => term.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'))
+
+  if (searchTerms.length === 0) {
+    return <span className={className}>{text}</span>
+  }
+
+  const regex = new RegExp(`(${searchTerms.join('|')})`, 'gi')
+  const parts = text.split(regex)
+
+  return (
+    <span className={className}>
+      {parts.map((part, index) => {
+        if (!part) return null
+
+        const isMatch = searchTerms.some((term) => new RegExp(term, 'gi').test(part))
+
+        return isMatch ? (
+          <span
+            key={index}
+            className='bg-[var(--highlight-match-bg)] text-[var(--highlight-match-text)]'
+          >
+            {part}
+          </span>
+        ) : (
+          <span key={index}>{part}</span>
+        )
+      })}
+    </span>
+  )
+}

apps/sim/components/ui/select.tsx

@@ -0,0 +1,158 @@
+'use client'
+
+import * as React from 'react'
+import * as SelectPrimitive from '@radix-ui/react-select'
+import { cn } from '@sim/emcn'
+import { Check, ChevronDown, ChevronUp } from 'lucide-react'
+
+const Select = SelectPrimitive.Root
+
+const SelectGroup = SelectPrimitive.Group
+
+const SelectValue = SelectPrimitive.Value
+
+const SelectTrigger = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Trigger>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Trigger>
+>(({ className, children, ...props }, ref) => (
+  <SelectPrimitive.Trigger
+    ref={ref}
+    className={cn(
+      'flex h-10 w-full items-center justify-between rounded-lg border border-input bg-input-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 [&>span]:line-clamp-1',
+      className
+    )}
+    {...props}
+  >
+    {children}
+    <SelectPrimitive.Icon asChild>
+      <ChevronDown className='size-4 opacity-50 transition-transform duration-200 ease-in-out' />
+    </SelectPrimitive.Icon>
+  </SelectPrimitive.Trigger>
+))
+SelectTrigger.displayName = SelectPrimitive.Trigger.displayName
+
+const SelectScrollUpButton = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.ScrollUpButton>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollUpButton>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.ScrollUpButton
+    ref={ref}
+    className={cn(
+      'sticky top-0 z-10 flex cursor-default items-center justify-center bg-popover py-1',
+      className
+    )}
+    {...props}
+  >
+    <ChevronUp className='size-4 opacity-70 transition-opacity hover-hover:opacity-100' />
+  </SelectPrimitive.ScrollUpButton>
+))
+SelectScrollUpButton.displayName = SelectPrimitive.ScrollUpButton.displayName
+
+const SelectScrollDownButton = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.ScrollDownButton>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollDownButton>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.ScrollDownButton
+    ref={ref}
+    className={cn(
+      'sticky bottom-0 z-10 flex cursor-default items-center justify-center bg-popover py-1',
+      className
+    )}
+    {...props}
+  >
+    <ChevronDown className='size-4 opacity-70 transition-opacity hover-hover:opacity-100' />
+  </SelectPrimitive.ScrollDownButton>
+))
+SelectScrollDownButton.displayName = SelectPrimitive.ScrollDownButton.displayName
+
+const SelectContent = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Content>
+>(({ className, children, position = 'popper', ...props }, ref) => (
+  <SelectPrimitive.Portal>
+    <SelectPrimitive.Content
+      ref={ref}
+      className={cn(
+        'data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 relative z-50 max-h-96 min-w-[8rem] overflow-hidden rounded-md border bg-popover text-popover-foreground shadow-md data-[state=closed]:animate-out data-[state=open]:animate-in',
+        position === 'popper' &&
+          'data-[side=left]:-translate-x-1 data-[side=top]:-translate-y-1 data-[side=right]:translate-x-1 data-[side=bottom]:translate-y-1',
+        className
+      )}
+      position={position}
+      {...props}
+    >
+      <SelectScrollUpButton />
+      <SelectPrimitive.Viewport
+        className={cn(
+          'p-1',
+          position === 'popper' &&
+            'h-[var(--radix-select-trigger-height)] w-full min-w-[var(--radix-select-trigger-width)]'
+        )}
+      >
+        {children}
+      </SelectPrimitive.Viewport>
+      <SelectScrollDownButton />
+    </SelectPrimitive.Content>
+  </SelectPrimitive.Portal>
+))
+SelectContent.displayName = SelectPrimitive.Content.displayName
+
+const SelectLabel = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Label>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Label>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.Label
+    ref={ref}
+    className={cn('py-1.5 pr-2 pl-8 font-semibold text-sm', className)}
+    {...props}
+  />
+))
+SelectLabel.displayName = SelectPrimitive.Label.displayName
+
+const SelectItem = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Item>
+>(({ className, children, ...props }, ref) => (
+  <SelectPrimitive.Item
+    ref={ref}
+    className={cn(
+      'relative flex w-full cursor-pointer select-none items-center rounded-sm py-1.5 pr-2 pl-8 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50',
+      className
+    )}
+    {...props}
+  >
+    <span className='absolute left-2 flex size-3.5 items-center justify-center'>
+      <SelectPrimitive.ItemIndicator>
+        <Check className='size-4' />
+      </SelectPrimitive.ItemIndicator>
+    </span>
+
+    <SelectPrimitive.ItemText>{children}</SelectPrimitive.ItemText>
+  </SelectPrimitive.Item>
+))
+SelectItem.displayName = SelectPrimitive.Item.displayName
+
+const SelectSeparator = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Separator>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Separator>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.Separator
+    ref={ref}
+    className={cn('-mx-1 my-1 h-px bg-muted', className)}
+    {...props}
+  />
+))
+SelectSeparator.displayName = SelectPrimitive.Separator.displayName
+
+export {
+  Select,
+  SelectGroup,
+  SelectValue,
+  SelectTrigger,
+  SelectContent,
+  SelectLabel,
+  SelectItem,
+  SelectSeparator,
+  SelectScrollUpButton,
+  SelectScrollDownButton,
+}

apps/sim/components/ui/shimmer-text.module.css

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+/**
+ * Claude-style text shimmer: the text paints from a gradient with a light band
+ * that sweeps across the glyphs via background-clip. This is the single source
+ * of truth for the treatment — the ThinkingLoader label composes it. Under
+ * reduced motion the sweep is replaced by a gentle opacity pulse in solid ink:
+ * the shimmer conveys essential in-progress state, so it needs a vestibular-safe
+ * fallback rather than none. Consumers whose resting text is not body ink set
+ * `--shimmer-rest` to their resting color.
+ */
+.shimmer {
+  background-image: linear-gradient(90deg, #4a4a4a 40%, #b0b0b0 50%, #4a4a4a 60%);
+  background-size: 200% 100%;
+  -webkit-background-clip: text;
+  background-clip: text;
+  color: transparent;
+  animation: shimmer-sweep 2.2s linear infinite;
+}
+
+:global(.dark) .shimmer {
+  background-image: linear-gradient(90deg, #b9b9b9 40%, #f8f8f8 50%, #b9b9b9 60%);
+}
+
+@keyframes shimmer-sweep {
+  to {
+    background-position: 200% 0;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .shimmer,
+  :global(.dark) .shimmer {
+    background-image: none;
+    -webkit-background-clip: initial;
+    background-clip: initial;
+    color: var(--shimmer-rest, var(--text-body));
+    animation: shimmer-pulse 2.2s ease-in-out infinite;
+  }
+}
+
+@keyframes shimmer-pulse {
+  50% {
+    opacity: 0.55;
+  }
+}

apps/sim/components/ui/shimmer-text.tsx

@@ -0,0 +1,17 @@
+import { cn } from '@sim/emcn'
+import styles from '@/components/ui/shimmer-text.module.css'
+
+interface ShimmerTextProps {
+  children: React.ReactNode
+  className?: string
+}
+
+/**
+ * Sweeping-highlight shimmer over a text phrase — the same treatment as the
+ * ThinkingLoader's "Thinking…" label, reusable on any active/streaming row.
+ * Size and weight come from the consumer's className; the gradient replaces
+ * the text color, so color classes are ignored while shimmering.
+ */
+export function ShimmerText({ children, className }: ShimmerTextProps) {
+  return <span className={cn(styles.shimmer, className)}>{children}</span>
+}

apps/sim/components/ui/thinking-loader.module.css

@@ -0,0 +1,366 @@
+/**
+ * ThinkingLoader gooey animation
+ *
+ * Metaball technique on the SVG alpha channel: ink shapes are blurred with
+ * feGaussianBlur, then feColorMatrix crushes the soft alpha back to hard
+ * edges. Unlike the CSS blur+contrast trick this needs no solid backdrop and
+ * no blend mode, so the loader composites cleanly on any background.
+ *
+ * Every variant is authored in the shared 100x100 viewBox. All stages stack
+ * inside one filtered group; because the alpha crush happens after the
+ * stages composite, crossfading two stages reads as one pattern melting
+ * into the next, which is what drives the cycling morph.
+ *
+ * Ink color rides on currentColor: near-black on light surfaces, off-white
+ * in dark mode.
+ */
+
+.frame {
+  /* currentColor paints the squeeze ring's stroked arcs (the only non-filled
+     geometry). It tracks the loader polarity — dark on light, light on dark —
+     matching the gradient stops below. */
+  color: #2c2c2c;
+  flex: none;
+  /* Loader fill is a radial gradient (center → edge) plus a soft white inner
+     glow, per the Figma loader spec. Stops and glow opacity are theme vars,
+     inherited by the gradient stops and feFlood inside the SVG, so one set of
+     defs serves both themes. Light mode = the DARK-grey loader (reads on white):
+     #2C2C2C → #5F5F5F, glow white 0.6. */
+  --tl-grad-inner: #2c2c2c;
+  --tl-grad-outer: #5f5f5f;
+  --tl-glow: rgba(255, 255, 255, 0.6);
+}
+
+/* Gradient stops + glow flood read the theme vars via CSS (a raw `var()` in an
+   SVG presentation attribute would not resolve — it must come through CSS).
+   `stop-color`/`flood-color` are transitionable even when fed by a var, so a
+   caller that re-points the ink vars (e.g. settling the loader's material into
+   a surface it hands off to) gets a smooth color tween, not a hard flip. */
+.gradInner {
+  stop-color: var(--tl-grad-inner);
+  transition: stop-color 450ms cubic-bezier(0.23, 1, 0.32, 1);
+}
+.gradOuter {
+  stop-color: var(--tl-grad-outer);
+  transition: stop-color 450ms cubic-bezier(0.23, 1, 0.32, 1);
+}
+.glow {
+  flood-color: var(--tl-glow);
+  transition: flood-color 450ms cubic-bezier(0.23, 1, 0.32, 1);
+}
+
+/* Wall-clock phase lock: the component sets --tl-sync to a shared negative
+   delay (now mod the common animation period), so every instance's keyframes
+   line up no matter when it mounted. The doubled class out-specifies the
+   shape classes' animation shorthand (implicit 0s delay) regardless of
+   source order. */
+.frame.frame * {
+  animation-delay: var(--tl-sync, 0s);
+}
+
+:global(.dark) .frame {
+  color: #d6d6d6;
+  /* Dark mode = the LIGHT-grey loader (reads on dark): #A7A7A7 → #D6D6D6,
+     glow white 0.9. */
+  --tl-grad-inner: #a7a7a7;
+  --tl-grad-outer: #d6d6d6;
+  --tl-glow: rgba(255, 255, 255, 0.9);
+}
+
+/* An explicit `.light` wrapper (e.g. the always-light landing) re-asserts the
+   dark-grey loader even when an outer `.dark` theme is on the document — the
+   nearer theme wins. Ordered after the `.dark` rule so on equal specificity
+   (both ancestors present) this takes precedence. */
+:global(.light) .frame {
+  color: #2c2c2c;
+  --tl-grad-inner: #2c2c2c;
+  --tl-grad-outer: #5f5f5f;
+  --tl-glow: rgba(255, 255, 255, 0.6);
+}
+
+.labelRow {
+  display: inline-flex;
+  align-items: center;
+  /* gap + label size scale with the loader (vars set per-instance); defaults
+     match the chat's size-20 loader (8px gap, 14px text). */
+  gap: var(--tl-label-gap, 8px);
+  /* The status phrase must never break onto a second line — the glyph + phrase
+     stay on one row regardless of phrase length or how narrow the available
+     width is (e.g. the hero loader docked near the card's right edge).
+     white-space inherits, so this one declaration reaches both the shimmer
+     (.label) and static (.labelStatic) text spans. */
+  white-space: nowrap;
+}
+
+/* The sweeping-band treatment itself (gradient, timing, dark mode, reduced
+   motion) is owned by the shared shimmer-text module; this class only adds the
+   loader-scaled font sizing. Canonical normal weight per emcn rules: body text
+   is 400, never medium. */
+.label {
+  composes: shimmer from "./shimmer-text.module.css";
+  font-size: var(--tl-label-size, 14px);
+  font-weight: 400;
+}
+
+/* Static label (shimmer off): the phrase in solid body ink, no gradient sweep. */
+.labelStatic {
+  font-size: var(--tl-label-size, 14px);
+  font-weight: 400;
+  color: var(--text-body);
+}
+
+/* Phrase crossfade — the incoming phrase rises and fades in while the outgoing
+   one rises and fades out (stacked over it), so phrases rotate smoothly. */
+.labelStack {
+  position: relative;
+  display: inline-flex;
+}
+.labelLayer {
+  display: inline-flex;
+}
+/* Incoming phrase wipes in left → right through an animated gradient mask
+   (soft trailing edge), so it's revealed horizontally rather than fading up. */
+.labelIn {
+  -webkit-mask-image: linear-gradient(90deg, #000 0, #000 70%, transparent 100%);
+  mask-image: linear-gradient(90deg, #000 0, #000 70%, transparent 100%);
+  -webkit-mask-size: 300% 100%;
+  mask-size: 300% 100%;
+  -webkit-mask-repeat: no-repeat;
+  mask-repeat: no-repeat;
+  animation: label-reveal 460ms ease both;
+}
+.labelOut {
+  position: absolute;
+  inset: 0;
+  animation: label-out 300ms ease both;
+}
+@keyframes label-reveal {
+  from {
+    opacity: 0;
+    -webkit-mask-position: 100% 0;
+    mask-position: 100% 0;
+  }
+  to {
+    opacity: 1;
+    -webkit-mask-position: 0% 0;
+    mask-position: 0% 0;
+  }
+}
+@keyframes label-out {
+  to {
+    opacity: 0;
+  }
+}
+
+.stage {
+  opacity: 0;
+  transition: opacity 0.5s ease;
+}
+
+.stageActive {
+  opacity: 1;
+}
+
+/* metaballs — two circles drift apart and melt back together */
+.metaballsA {
+  animation: metaballs-a 1s infinite alternate;
+}
+.metaballsB {
+  animation: metaballs-b 1s infinite alternate;
+}
+@keyframes metaballs-a {
+  90%,
+  100% {
+    transform: translateX(28px);
+  }
+}
+@keyframes metaballs-b {
+  90%,
+  100% {
+    transform: translateX(-28px);
+  }
+}
+
+/* relay (Return) — always left → right: the ball emerges from the left post,
+   travels across, and dissolves into the right post (the goo morphs it into
+   that shape). It fades out at the right and in at the left, so the reset back
+   to the start happens while invisible — no bounce, no hard snap. */
+.relayBall {
+  animation: relay 1.3s linear infinite;
+}
+@keyframes relay {
+  0% {
+    transform: translateX(0);
+    opacity: 0;
+  }
+  20% {
+    opacity: 1;
+  }
+  78% {
+    opacity: 1;
+  }
+  100% {
+    transform: translateX(58px);
+    opacity: 0;
+  }
+}
+
+/* corners — four dots rotate around a center square */
+.cornersA {
+  animation: corners-a 0.8s infinite;
+}
+.cornersB {
+  animation: corners-b 0.8s infinite;
+}
+.cornersC {
+  animation: corners-c 0.8s infinite;
+}
+.cornersD {
+  animation: corners-d 0.8s infinite;
+}
+@keyframes corners-a {
+  100% {
+    transform: translate(46px, 0);
+  }
+}
+@keyframes corners-b {
+  100% {
+    transform: translate(0, 46px);
+  }
+}
+@keyframes corners-c {
+  100% {
+    transform: translate(-46px, 0);
+  }
+}
+@keyframes corners-d {
+  100% {
+    transform: translate(0, -46px);
+  }
+}
+
+/* burst — four dots repeatedly fling out of a center cross */
+.burstUp {
+  animation: burst-up 0.8s infinite;
+}
+.burstDown {
+  animation: burst-down 0.8s infinite;
+}
+.burstLeft {
+  animation: burst-left 0.8s infinite;
+}
+.burstRight {
+  animation: burst-right 0.8s infinite;
+}
+@keyframes burst-up {
+  100% {
+    transform: translateY(-50px);
+  }
+}
+@keyframes burst-down {
+  100% {
+    transform: translateY(50px);
+  }
+}
+@keyframes burst-left {
+  100% {
+    transform: translateX(-50px);
+  }
+}
+@keyframes burst-right {
+  100% {
+    transform: translateX(50px);
+  }
+}
+
+/* compass — one dot tours the four cardinal points */
+.compassMover {
+  animation: compass 2s infinite;
+}
+@keyframes compass {
+  0% {
+    transform: translate(0, 0);
+  }
+  25% {
+    transform: translate(27px, 27px);
+  }
+  50% {
+    transform: translate(0, 54px);
+  }
+  75% {
+    transform: translate(-27px, 27px);
+  }
+  100% {
+    transform: translate(0, 0);
+  }
+}
+
+/* squeeze — two bars pinch together inside the ring arcs */
+.squeezeBarL {
+  animation: squeeze-l 0.6s infinite alternate;
+}
+.squeezeBarR {
+  animation: squeeze-r 0.6s infinite alternate;
+}
+@keyframes squeeze-l {
+  0%,
+  30% {
+    transform: translateX(0);
+  }
+  100% {
+    transform: translateX(10px);
+  }
+}
+@keyframes squeeze-r {
+  0%,
+  30% {
+    transform: translateX(0);
+  }
+  100% {
+    transform: translateX(-10px);
+  }
+}
+
+/* thinking — three small blobs drift out from the core and back on offset
+   periods (1.3/1.6/1.9s), so the merged cloud churns and never repeats:
+   the Core weighing options. */
+.thinkA {
+  animation: think-a 1.6s infinite alternate;
+}
+.thinkB {
+  animation: think-b 1.9s infinite alternate;
+}
+.thinkC {
+  animation: think-c 1.3s infinite alternate;
+}
+@keyframes think-a {
+  100% {
+    transform: translate(-20px, -14px);
+  }
+}
+@keyframes think-b {
+  100% {
+    transform: translate(22px, -10px);
+  }
+}
+@keyframes think-c {
+  100% {
+    transform: translate(2px, 22px);
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .frame *,
+  .labelIn {
+    animation: none;
+  }
+  .gradInner,
+  .gradOuter,
+  .glow {
+    transition: none;
+  }
+  /* No crossfade — the incoming phrase just replaces the outgoing one. */
+  .labelOut {
+    display: none;
+  }
+}

apps/sim/components/ui/thinking-loader.tsx

@@ -0,0 +1,448 @@
+'use client'
+
+import { type CSSProperties, type ReactNode, useEffect, useId, useState } from 'react'
+import { cn } from '@sim/emcn'
+import styles from '@/components/ui/thinking-loader.module.css'
+
+const VARIANTS = [
+  'metaballs',
+  'relay',
+  'corners',
+  'burst',
+  'compass',
+  'squeeze',
+  'thinking',
+  'orb',
+] as const
+
+export type ThinkingLoaderVariant = (typeof VARIANTS)[number]
+
+/**
+ * Shapes used in the random morph cycle. `orb` (the solid terminal circle) is
+ * excluded — it is only reachable by pinning `variant='orb'` or via `settle`,
+ * so the cycle never lands on it mid-stream.
+ */
+const CYCLE_VARIANTS = VARIANTS.filter((v) => v !== 'orb')
+
+/**
+ * Deterministic integer hash — turns a step index into a spread-out pseudo-
+ * random number. Used to pick both the shape and its hold time per step, so the
+ * order and pacing look unpredictable (any shape can follow any other, some
+ * linger, some pass quickly) while staying a pure function of the clock — every
+ * loader instance lands on the same shape at the same time.
+ */
+function hashStep(n: number): number {
+  let x = n | 0
+  x = Math.imul((x >>> 16) ^ x, 0x45d9f3b)
+  x = Math.imul((x >>> 16) ^ x, 0x45d9f3b)
+  return ((x >>> 16) ^ x) >>> 0
+}
+
+/**
+ * Common multiple of every shape animation period (800/1000/1200/2000ms,
+ * alternates doubled) — the wall-clock modulus for the shared negative
+ * animation-delay that phase-locks instances mounted at different times.
+ */
+const SYNC_PERIOD_MS = 12_000
+
+/**
+ * A super-cycle of steps, each holding a pseudo-random shape for a pseudo-random
+ * duration (≈1.1–2.6s), so the morph pacing feels natural — some shapes linger,
+ * some pass quickly — instead of a metronome. Deterministic, so instances stay
+ * in lockstep; long enough not to read as a loop.
+ */
+const CYCLE_STEPS = 16
+const STEP_MIN_MS = 1100
+const STEP_RANGE_MS = 1500
+const STEP_DURATIONS = Array.from(
+  { length: CYCLE_STEPS },
+  (_, i) => STEP_MIN_MS + (hashStep(i + 1000) % STEP_RANGE_MS)
+)
+const SUPER_PERIOD_MS = STEP_DURATIONS.reduce((sum, d) => sum + d, 0)
+
+/** The shape for a given step — pseudo-random, never an immediate repeat. */
+function variantForStep(i: number): ThinkingLoaderVariant {
+  const idx = hashStep(i) % CYCLE_VARIANTS.length
+  const prevIdx = hashStep((i - 1 + CYCLE_STEPS) % CYCLE_STEPS) % CYCLE_VARIANTS.length
+  return CYCLE_VARIANTS[idx === prevIdx ? (idx + 1) % CYCLE_VARIANTS.length : idx]
+}
+
+/**
+ * The shape the shared timeline is on right now, and how long until the next.
+ * Walks the super-cycle's varied step durations — a pure function of the wall
+ * clock, so instances stay in lockstep.
+ */
+function variantAtNow(): { variant: ThinkingLoaderVariant; msUntilNext: number } {
+  let t = Date.now() % SUPER_PERIOD_MS
+  for (let i = 0; i < CYCLE_STEPS; i++) {
+    if (t < STEP_DURATIONS[i]) {
+      return { variant: variantForStep(i), msUntilNext: STEP_DURATIONS[i] - t }
+    }
+    t -= STEP_DURATIONS[i]
+  }
+  return { variant: variantForStep(0), msUntilNext: STEP_DURATIONS[0] }
+}
+
+/**
+ * Ink shapes per variant, authored in the shared 100x100 viewBox.
+ * Geometry mirrors the intrinsic CSS loaders these were adapted from,
+ * contain-fit to the canvas. Animations live in the CSS module.
+ */
+const VARIANT_SHAPES: Record<ThinkingLoaderVariant, ReactNode> = {
+  metaballs: (
+    <>
+      <circle className={styles.metaballsA} cx='22' cy='50' r='16' />
+      <circle className={styles.metaballsB} cx='78' cy='50' r='16' />
+    </>
+  ),
+  relay: (
+    <>
+      <rect x='13' y='28' width='16' height='44' />
+      <rect x='71' y='28' width='16' height='44' />
+      <circle className={styles.relayBall} cx='21' cy='50' r='14' />
+    </>
+  ),
+  corners: (
+    <>
+      <rect x='27' y='27' width='46' height='46' />
+      <circle className={styles.cornersA} cx='27' cy='27' r='14' />
+      <circle className={styles.cornersB} cx='73' cy='27' r='14' />
+      <circle className={styles.cornersC} cx='73' cy='73' r='14' />
+      <circle className={styles.cornersD} cx='27' cy='73' r='14' />
+    </>
+  ),
+  // burst (Thinking) — four dots fling out of a center cross and are swallowed
+  // at the window edge, then fire again: the Core churning.
+  burst: (
+    <>
+      <rect x='12.5' y='43.75' width='75' height='12.5' />
+      <rect x='43.75' y='12.5' width='12.5' height='75' />
+      <circle cx='50' cy='50' r='12.5' />
+      <circle className={styles.burstUp} cx='50' cy='50' r='12.5' />
+      <circle className={styles.burstDown} cx='50' cy='50' r='12.5' />
+      <circle className={styles.burstLeft} cx='50' cy='50' r='12.5' />
+      <circle className={styles.burstRight} cx='50' cy='50' r='12.5' />
+    </>
+  ),
+  compass: (
+    <>
+      <circle cx='50' cy='23' r='14' />
+      <circle cx='23' cy='50' r='14' />
+      <circle cx='77' cy='50' r='14' />
+      <circle cx='50' cy='77' r='14' />
+      <circle className={styles.compassMover} cx='50' cy='23' r='14' />
+    </>
+  ),
+  squeeze: (
+    <>
+      {/* Arcs are stroked, not filled — they inherit the group's gradient stroke
+          (so the O is shaded identically to every other shape); the group pins
+          stroke-width to 0, so each arc re-asserts its own 12.5. */}
+      <path d='M 21.36 37.5 A 31.25 31.25 0 0 1 78.64 37.5' fill='none' strokeWidth='12.5' />
+      <path d='M 21.36 62.5 A 31.25 31.25 0 0 0 78.64 62.5' fill='none' strokeWidth='12.5' />
+      <rect className={styles.squeezeBarL} x='15' y='37.5' width='12.5' height='25' />
+      <rect className={styles.squeezeBarR} x='72.5' y='37.5' width='12.5' height='25' />
+    </>
+  ),
+  // thinking — a core with small blobs drifting out and back on offset timings:
+  // a restless thought-cloud that never quite resolves. The Core deliberating.
+  thinking: (
+    <>
+      <circle cx='50' cy='50' r='15' />
+      <circle className={styles.thinkA} cx='50' cy='50' r='12' />
+      <circle className={styles.thinkB} cx='50' cy='50' r='12' />
+      <circle className={styles.thinkC} cx='50' cy='50' r='11' />
+    </>
+  ),
+  // orb — a single solid disc that nearly fills the frame. Not part of the
+  // random cycle; the loader settles here so it can hand off to a real circular
+  // button (e.g. a send button) without a visible shape pop.
+  orb: <circle cx='50' cy='50' r='42' />,
+}
+
+/**
+ * World-aligned status phrase per shape (used when `phase` is set). Each phrase
+ * names what the shape represents in the Sim world, so the words on screen always
+ * match the loader. Keys are the shape names; the comment is the world concept.
+ */
+const VARIANT_PHRASE: Record<ThinkingLoaderVariant, string> = {
+  corners: 'Orchestrating…', // Mothership — the Core directing the work
+  squeeze: 'Working…', // Pod — one agent on a task
+  compass: 'In formation…', // Formation — many Pods in parallel
+  metaballs: 'Dispatching…', // Dispatch — sending work out
+  relay: 'Returning…', // Return — work coming back, consolidated
+  burst: 'Thinking…', // Thinking — the Core deliberating
+  thinking: 'Standing by…', // Waiting · Sentinel — holding for a condition
+  orb: 'Ready', // Orb — settled, ready to act
+}
+
+export interface ThinkingLoaderProps {
+  /** Pin one pattern. When omitted, the loader morphs between all patterns at random. */
+  variant?: ThinkingLoaderVariant
+  /**
+   * When cycling, open on this pattern (held one beat) before joining the
+   * shared morph timeline. Use `'corners'` (the Mothership shape) to always
+   * begin on the Core. Ignored when `variant` pins a single pattern.
+   */
+  startVariant?: ThinkingLoaderVariant
+  /**
+   * Stop cycling and morph to the solid `orb` disc — the loader's terminal
+   * resting shape. The goo filter melts the current shape into the orb (no hard
+   * swap), so it can hand off to a real circular element underneath it. Ignored
+   * when `variant` pins a single pattern.
+   */
+  settle?: boolean
+  /** Rendered square size in px. Defaults to 20. */
+  size?: number
+  /** Optional status text (e.g. "Thinking…") rendered beside the goo with a shimmer sweep. */
+  label?: string
+  /**
+   * Show a world-aligned status phrase that matches the current shape — e.g.
+   * "Dispatching…" under the Dispatch shape — updating as the loader morphs.
+   * Overrides `label`.
+   */
+  phase?: boolean
+  /**
+   * Phrase/label font size as a fraction of `size`. Defaults to `0.7`. Lower it
+   * when the loader is shown scaled up (e.g. a zoomed hero shot) so the phrase
+   * doesn't read oversized next to the glyph.
+   */
+  labelRatio?: number
+  /**
+   * Paint the label with the sweeping Claude-style shimmer (default). Set
+   * `false` for a static label in solid `--text-body` ink — no gradient, no
+   * sweep — while the phrase crossfade still applies.
+   */
+  shimmer?: boolean
+  /** Layout-only classes (margins, alignment). The loader owns its chrome. */
+  className?: string
+  /**
+   * Escape hatch for the ink material: merged onto the SVG, so a caller can
+   * override the gradient/glow CSS vars (`--tl-grad-inner`, `--tl-grad-outer`,
+   * `--tl-glow`) to match a surface it hands off to. Inline, so it beats the
+   * module defaults. Use sparingly — the loader owns its look by default.
+   */
+  style?: CSSProperties
+}
+
+/**
+ * Gooey mono thinking indicator shown wherever chat is working.
+ * Ink is near-black on light surfaces and off-white on dark surfaces.
+ *
+ * The goo filter operates on the alpha channel of transparent SVG shapes,
+ * so the loader needs no backdrop and composites on any background. All
+ * patterns share one filtered group, so the default cycling mode melts one
+ * pattern into the next instead of hard-swapping.
+ *
+ * @example
+ * ```tsx
+ * <ThinkingLoader label='Thinking…' />
+ * ```
+ */
+export function ThinkingLoader({
+  variant,
+  startVariant,
+  settle = false,
+  size = 20,
+  label,
+  phase,
+  labelRatio = 0.7,
+  shimmer = true,
+  className,
+  style,
+}: ThinkingLoaderProps) {
+  // useId emits colons, which break url(#...) filter references — strip them.
+  const id = useId().replace(/[^a-zA-Z0-9-]/g, '')
+  const filterId = `tl-goo-${id}`
+  const clipId = `tl-clip-${id}`
+  const windowClipId = `tl-window-${id}`
+  const gradientId = `tl-grad-${id}`
+  const [cycleVariant, setCycleVariant] = useState<ThinkingLoaderVariant>(
+    startVariant ?? 'metaballs'
+  )
+  const cycling = variant === undefined
+
+  useEffect(() => {
+    if (!cycling) return
+    // Settle: stop the cycle and melt to the terminal orb (goo handles the morph).
+    if (settle) {
+      setCycleVariant('orb')
+      return
+    }
+    if (window.matchMedia('(prefers-reduced-motion: reduce)').matches) return
+
+    // When a startVariant is given, hold it for one min-step so the cycle always
+    // opens on that shape, then join the shared wall-clock morph timeline.
+    let opened = startVariant === undefined
+    let timeout: ReturnType<typeof setTimeout>
+    const tick = () => {
+      if (!opened) {
+        opened = true
+        setCycleVariant(startVariant as ThinkingLoaderVariant)
+        timeout = setTimeout(tick, STEP_MIN_MS)
+        return
+      }
+      const { variant: next, msUntilNext } = variantAtNow()
+      setCycleVariant(next)
+      timeout = setTimeout(tick, msUntilNext)
+    }
+    tick()
+    return () => clearTimeout(timeout)
+  }, [cycling, startVariant, settle])
+
+  // Phase-lock the CSS animations to the wall clock (set after mount so
+  // server and client markup agree). All instances share the same negative
+  // delay modulus, so their keyframes line up regardless of mount time.
+  const [syncDelay, setSyncDelay] = useState<string | undefined>(undefined)
+  useEffect(() => {
+    setSyncDelay(`-${Date.now() % SYNC_PERIOD_MS}ms`)
+  }, [])
+
+  const shown = variant ?? cycleVariant
+  // `phase` shows the world phrase for the shape on screen; otherwise the
+  // caller's static label (if any). Cycling, it updates as the shape morphs.
+  const displayLabel = phase ? VARIANT_PHRASE[shown] : label
+
+  // Crossfade the phrase when it changes: the outgoing phrase rises and fades
+  // out while the incoming one rises and fades in, so they rotate smoothly
+  // instead of snapping. The shimmer keeps running on the text underneath.
+  const [shownLabel, setShownLabel] = useState(displayLabel)
+  const [exitingLabel, setExitingLabel] = useState<string | undefined>(undefined)
+  useEffect(() => {
+    if (displayLabel === shownLabel) return
+    setExitingLabel(shownLabel)
+    setShownLabel(displayLabel)
+  }, [displayLabel, shownLabel])
+  useEffect(() => {
+    if (!exitingLabel) return
+    const timeout = setTimeout(() => setExitingLabel(undefined), 420)
+    return () => clearTimeout(timeout)
+  }, [exitingLabel])
+
+  const stages = cycling ? VARIANTS : [shown]
+
+  const loader = (
+    <svg
+      role={displayLabel ? undefined : 'status'}
+      aria-label={displayLabel ? undefined : 'Thinking'}
+      aria-hidden={displayLabel ? true : undefined}
+      viewBox='0 0 100 100'
+      width={size}
+      height={size}
+      className={cn(styles.frame, !displayLabel && className)}
+      style={{
+        ...(syncDelay ? ({ '--tl-sync': syncDelay } as CSSProperties) : {}),
+        ...style,
+      }}
+    >
+      <defs>
+        {/* sRGB so the radial gradient fill keeps its authored midtones
+            through the blur (linearRGB would wash the gradient out). The goo
+            crush runs first; the inner glow then rides the merged silhouette's
+            edge — a soft white inset, per the Figma loader spec. */}
+        <filter
+          id={filterId}
+          x='-30%'
+          y='-30%'
+          width='160%'
+          height='160%'
+          colorInterpolationFilters='sRGB'
+        >
+          <feGaussianBlur in='SourceGraphic' stdDeviation='5' result='blur' />
+          <feColorMatrix
+            in='blur'
+            values='1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 19 -9'
+            result='goo'
+          />
+          {/* Inner shadow from the goo silhouette's alpha (Figma technique:
+              blur the alpha, subtract it from itself to leave an inner ring,
+              tint white). stdDeviation 4.86 = the spec's 3.5 scaled 72→100. */}
+          <feColorMatrix
+            in='goo'
+            type='matrix'
+            values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 127 0'
+            result='gooAlpha'
+          />
+          <feGaussianBlur in='gooAlpha' stdDeviation='4.86' result='innerBlur' />
+          <feComposite
+            in='innerBlur'
+            in2='gooAlpha'
+            operator='arithmetic'
+            k2='-1'
+            k3='1'
+            result='innerMask'
+          />
+          {/* Glow color + per-theme opacity ride a CSS var (light 0.6 / dark
+              0.9) so one filter serves both themes. */}
+          <feFlood className={styles.glow} result='glowColor' />
+          <feComposite in='glowColor' in2='innerMask' operator='in' result='glow' />
+          <feMerge>
+            <feMergeNode in='goo' />
+            <feMergeNode in='glow' />
+          </feMerge>
+        </filter>
+        {/* Radial gradient (center → edge), theme stops via CSS vars. Matches
+            the Figma loader: light #4F4F4F→#6F6F6F, dark #A7A7A7→#D6D6D6.
+            objectBoundingBox (default units) so EACH blob is shaded on its own
+            box — Figma fits the gradient per shape, so small/offset dots read
+            glossy (center dark, edge light) instead of flat. */}
+        <radialGradient id={gradientId} cx='0.5' cy='0.5' r='0.5'>
+          <stop className={styles.gradInner} />
+          <stop offset='1' className={styles.gradOuter} />
+        </radialGradient>
+        {/* Shapes clip BEFORE the goo filter, so anything exiting the frame
+            melts into the edge instead of getting a hard post-filter cut. */}
+        <clipPath id={clipId}>
+          <rect width='100' height='100' />
+        </clipPath>
+        {/* The original burst loader hid its flying dots under a 10px border,
+            swallowing them at the inner window — this clip reproduces it. */}
+        <clipPath id={windowClipId}>
+          <rect x='12.5' y='12.5' width='75' height='75' />
+        </clipPath>
+      </defs>
+      <g
+        filter={`url(#${filterId})`}
+        fill={`url(#${gradientId})`}
+        stroke={`url(#${gradientId})`}
+        strokeWidth={0}
+      >
+        {stages.map((v) => (
+          <g
+            key={v}
+            clipPath={`url(#${v === 'burst' ? windowClipId : clipId})`}
+            className={cn(styles.stage, v === shown && styles.stageActive)}
+          >
+            {VARIANT_SHAPES[v]}
+          </g>
+        ))}
+      </g>
+    </svg>
+  )
+
+  if (!displayLabel) return loader
+
+  return (
+    <output
+      className={cn(styles.labelRow, className)}
+      style={
+        {
+          '--tl-label-size': `${size * labelRatio}px`,
+          '--tl-label-gap': `${size * 0.4}px`,
+        } as CSSProperties
+      }
+    >
+      {loader}
+      <span className={styles.labelStack}>
+        {exitingLabel ? (
+          <span key={exitingLabel} className={cn(styles.labelLayer, styles.labelOut)}>
+            <span className={shimmer ? styles.label : styles.labelStatic}>{exitingLabel}</span>
+          </span>
+        ) : null}
+        <span key={shownLabel} className={cn(styles.labelLayer, styles.labelIn)}>
+          <span className={shimmer ? styles.label : styles.labelStatic}>{shownLabel}</span>
+        </span>
+      </span>
+    </output>
+  )
+}