improvement(emcn): extract design system into shared @sim/emcn package

.claude/rules/emcn-components.md

@@ -5,13 +5,13 @@ paths:
 
 # EMCN Components
 
-Import from `@/components/emcn`, never from subpaths (except CSS files). The **chip family** is the platform's primary chrome — always reach for it over the legacy primitives it is progressively replacing (`Input`→`ChipInput`, `Textarea`→`ChipTextarea`, `Modal`→`ChipModal`, `Select`/`Combobox`→`ChipSelect`/`ChipCombobox`/`ChipDropdown`, `Switch`→`ChipSwitch`, date field→`ChipDatePicker`). For context/action menus the canonical control is `DropdownMenu` — the standard menu (not a chip, and never a hand-rolled popover).
+Import components, `cn`, and tokens from the `@sim/emcn` barrel; icons come from the `@sim/emcn/icons` subpath, and CSS modules from their file path. Never deep-import other component subpaths. The **chip family** is the platform's primary chrome — always reach for it over the legacy primitives it is progressively replacing (`Input`→`ChipInput`, `Textarea`→`ChipTextarea`, `Modal`→`ChipModal`, `Select`/`Combobox`→`ChipSelect`/`ChipCombobox`/`ChipDropdown`, `Switch`→`ChipSwitch`, date field→`ChipDatePicker`). For context/action menus the canonical control is `DropdownMenu` — the standard menu (not a chip, and never a hand-rolled popover).
 
 ## Chip chrome — single source of truth
 
 Never hand-roll the chip pill from raw class strings (they go stale). Compose from the canonical sources:
 
-- **Surface, typography + content tokens:** `chip/chip-chrome.ts` — `chipFilledSurfaceTokens`, `chipFieldSurfaceClass`, `chipFieldTextClass` (text fields and the dropdown search box build on these), plus the chip-content chrome `chipContentGap`, `chipGeometryClass`, `chipContentIconClass`, `chipContentLabelClass`, and `cellIconNodeClass` (non-chip surfaces that must visually match chip content, e.g. resource table cells). All are re-exported from the `@/components/emcn` barrel — no subpath import needed.
+- **Surface, typography + content tokens:** `chip/chip-chrome.ts` — `chipFilledSurfaceTokens`, `chipFieldSurfaceClass`, `chipFieldTextClass` (text fields and the dropdown search box build on these), plus the chip-content chrome `chipContentGap`, `chipGeometryClass`, `chipContentIconClass`, `chipContentLabelClass`, and `cellIconNodeClass` (non-chip surfaces that must visually match chip content, e.g. resource table cells). All are re-exported from the `@sim/emcn` barrel — no subpath import needed.
 - **Pill geometry:** `chip/chip.tsx` — `chipVariants` (30px tall, `rounded-lg`, `px-2`, icon↔text `gap-1.5`). Every pill-shaped trigger (`ChipDropdown`, `ChipSelect`, `ChipSwitch`) reuses it for visual parity.
 
 Canonical look: normal font-weight (never `font-medium`/`font-semibold`), value text `--text-body`, icons `--text-icon` at `size-[14px]`, placeholder `--text-muted`, `transition-colors`, **no focus ring** (the caret marks focus). Filled surface is `--surface-5` light / `--surface-4` dark with a `--border-1` border.

.claude/rules/sim-imports.md

@@ -47,7 +47,7 @@ import { CORE_TRIGGER_TYPES } from '@/app/workspace/.../utils'
 
 1. React/core libraries
 2. External libraries
-3. UI components (`@/components/emcn`, `@/components/ui`)
+3. UI components (`@sim/emcn`, `@/components/ui`)
 4. Utilities (`@/lib/...`)
 5. Stores (`@/stores/...`)
 6. Feature imports

.claude/rules/sim-styling.md

@@ -16,7 +16,7 @@ paths:
 ## Conditional Classes
 
 ```typescript
-import { cn } from '@/lib/core/utils/cn'
+import { cn } from '@sim/emcn'
 
 <div className={cn(
   'base-classes',
@@ -52,7 +52,7 @@ Value text `--text-body`; muted/placeholder/labels `--text-muted`; icons `--text
 
 ## Chip Components (consumer usage)
 
-`ChipInput`, `ChipTextarea`, `ChipModal*` own their full chrome. Consumers describe intent through PROPS; they never re-style the chrome. The canonical chrome lives in `apps/sim/components/emcn/components/chip/chip-chrome.ts` (all tokens are re-exported from the `@/components/emcn` barrel — no subpath import needed) — never hand-roll `rounded-lg`/`border`/`bg-[var(--surface-5)]`/`h-[30px]`/`px-2`/`text-sm`/focus rings.
+`ChipInput`, `ChipTextarea`, `ChipModal*` own their full chrome. Consumers describe intent through PROPS; they never re-style the chrome. The canonical chrome lives in `apps/sim/components/emcn/components/chip/chip-chrome.ts` (all tokens are re-exported from the `@sim/emcn` barrel — no subpath import needed) — never hand-roll `rounded-lg`/`border`/`bg-[var(--surface-5)]`/`h-[30px]`/`px-2`/`text-sm`/focus rings.
 
 ### Props over className
 

.cursor/rules/emcn-components.mdc

@@ -4,13 +4,13 @@ globs: ["apps/sim/components/emcn/**"]
 ---
 # EMCN Components
 
-Import from `@/components/emcn`, never from subpaths (except CSS files). The **chip family** is the platform's primary chrome — always reach for it over the legacy primitives it is progressively replacing (`Input`→`ChipInput`, `Textarea`→`ChipTextarea`, `Modal`→`ChipModal`, `Select`/`Combobox`→`ChipSelect`/`ChipCombobox`/`ChipDropdown`, `Switch`→`ChipSwitch`, date field→`ChipDatePicker`). For context/action menus the canonical control is `DropdownMenu` — the standard menu (not a chip, and never a hand-rolled popover).
+Import from `@sim/emcn`, never from subpaths (except CSS files). The **chip family** is the platform's primary chrome — always reach for it over the legacy primitives it is progressively replacing (`Input`→`ChipInput`, `Textarea`→`ChipTextarea`, `Modal`→`ChipModal`, `Select`/`Combobox`→`ChipSelect`/`ChipCombobox`/`ChipDropdown`, `Switch`→`ChipSwitch`, date field→`ChipDatePicker`). For context/action menus the canonical control is `DropdownMenu` — the standard menu (not a chip, and never a hand-rolled popover).
 
 ## Chip chrome — single source of truth
 
 Never hand-roll the chip pill from raw class strings (they go stale). Compose from the canonical sources:
 
-- **Surface, typography + content tokens:** `chip/chip-chrome.ts` — `chipFilledSurfaceTokens`, `chipFieldSurfaceClass`, `chipFieldTextClass` (text fields and the dropdown search box build on these), plus the chip-content chrome `chipContentGap`, `chipGeometryClass`, `chipContentIconClass`, `chipContentLabelClass`, and `cellIconNodeClass` (non-chip surfaces that must visually match chip content, e.g. resource table cells). All are re-exported from the `@/components/emcn` barrel — no subpath import needed.
+- **Surface, typography + content tokens:** `chip/chip-chrome.ts` — `chipFilledSurfaceTokens`, `chipFieldSurfaceClass`, `chipFieldTextClass` (text fields and the dropdown search box build on these), plus the chip-content chrome `chipContentGap`, `chipGeometryClass`, `chipContentIconClass`, `chipContentLabelClass`, and `cellIconNodeClass` (non-chip surfaces that must visually match chip content, e.g. resource table cells). All are re-exported from the `@sim/emcn` barrel — no subpath import needed.
 - **Pill geometry:** `chip/chip.tsx` — `chipVariants` (30px tall, `rounded-lg`, `px-2`, icon↔text `gap-1.5`). Every pill-shaped trigger (`ChipDropdown`, `ChipSelect`, `ChipSwitch`) reuses it for visual parity.
 
 Canonical look: normal font-weight (never `font-medium`/`font-semibold`), value text `--text-body`, icons `--text-icon` at `size-[14px]`, placeholder `--text-muted`, `transition-colors`, **no focus ring** (the caret marks focus). Filled surface is `--surface-5` light / `--surface-4` dark with a `--border-1` border.

.cursor/rules/sim-imports.mdc

@@ -46,7 +46,7 @@ import { CORE_TRIGGER_TYPES } from '@/app/workspace/.../utils'
 
 1. React/core libraries
 2. External libraries
-3. UI components (`@/components/emcn`, `@/components/ui`)
+3. UI components (`@sim/emcn`, `@/components/ui`)
 4. Utilities (`@/lib/...`)
 5. Stores (`@/stores/...`)
 6. Feature imports

.cursor/rules/sim-styling.mdc

@@ -14,7 +14,7 @@ globs: ["apps/sim/**/*.tsx", "apps/sim/**/*.css"]
 ## Conditional Classes
 
 ```typescript
-import { cn } from '@/lib/core/utils/cn'
+import { cn } from '@sim/emcn'
 
 <div className={cn(
   'base-classes',
@@ -50,7 +50,7 @@ Value text `--text-body`; muted/placeholder/labels `--text-muted`; icons `--text
 
 ## Chip Components (consumer usage)
 
-`ChipInput`, `ChipTextarea`, `ChipModal*` own their full chrome. Consumers describe intent through PROPS; they never re-style the chrome. The canonical chrome lives in `apps/sim/components/emcn/components/chip/chip-chrome.ts` (all tokens are re-exported from the `@/components/emcn` barrel — no subpath import needed) — never hand-roll `rounded-lg`/`border`/`bg-[var(--surface-5)]`/`h-[30px]`/`px-2`/`text-sm`/focus rings.
+`ChipInput`, `ChipTextarea`, `ChipModal*` own their full chrome. Consumers describe intent through PROPS; they never re-style the chrome. The canonical chrome lives in `apps/sim/components/emcn/components/chip/chip-chrome.ts` (all tokens are re-exported from the `@sim/emcn` barrel — no subpath import needed) — never hand-roll `rounded-lg`/`border`/`bg-[var(--surface-5)]`/`h-[30px]`/`px-2`/`text-sm`/focus rings.
 
 ### Props over className
 

CLAUDE.md

@@ -93,7 +93,7 @@ Use barrel exports (`index.ts`) when a folder has 3+ exports. Do not re-export f
 
 1. React/core libraries
 2. External libraries
-3. UI components (`@/components/emcn`, `@/components/ui`)
+3. UI components (`@sim/emcn`, `@/components/ui`)
 4. Utilities (`@/lib/...`)
 5. Stores (`@/stores/...`)
 6. Feature imports
@@ -375,7 +375,7 @@ Co-locate a `search-params.ts` per feature exporting the parser map (single sour
 
 ## Styling
 
-Use Tailwind only, no inline styles. Use `cn()` from `@/lib/core/utils/cn` for conditional classes.
+Use Tailwind only, no inline styles. Use `cn()` from `@sim/emcn` for conditional classes.
 
 ```typescript
 <div className={cn('base-classes', isActive && 'active-classes')} />
@@ -391,7 +391,7 @@ On chip components (see "EMCN Components"), drive chrome through PROPS, not `cla
 
 ## EMCN Components
 
-Import from `@/components/emcn`, never from subpaths (except CSS files). Use CVA only when 2+ genuine variants exist; otherwise plain `cn()`.
+Import components, `cn`, and tokens from the `@sim/emcn` barrel; icons come from the `@sim/emcn/icons` subpath, and CSS modules from their file path. Never deep-import other component subpaths. Use CVA only when 2+ genuine variants exist; otherwise plain `cn()`.
 
 The chip family is the canonical UI chrome and is progressively replacing the legacy EMCN primitives — always reach for the chip equivalent: `ChipInput` over `Input`, `ChipTextarea` over `Textarea`, `ChipModal`/`ChipModalField` over `Modal`, `ChipSelect`/`ChipCombobox` (searchable) or `ChipDropdown` (simple menu-select) over `Select`/`Combobox`, `ChipSwitch` over `Switch`, `ChipDatePicker` over a raw date field, `Chip`/`ChipLink` for pill buttons/links, `ChipTag` for inline tags/badges. For context/action menus the canonical control is `DropdownMenu` (not a chip, but the standard menu — not a hand-rolled popover). Components OWN their chrome (single source of truth) — consumers pass props, not class overrides. Authoring rules in `.claude/rules/emcn-components.md`; consumer rules in `.claude/rules/sim-styling.md`.
 

apps/docs/app/[lang]/not-found.tsx

@@ -1,5 +1,5 @@
+import { ChipLink } from '@sim/emcn'
 import { DocsPage } from 'fumadocs-ui/page'
-import { ChipLink } from '@/components/ui/chip'
 
 export const metadata = {
   title: 'Page Not Found',

apps/docs/app/global.css

@@ -59,8 +59,14 @@ body {
   --text-icon: #525252;
   --text-inverse: #ffffff;
   --text-error: #ef4444;
+  --text-muted-inverse: #a0a0a0;
   --brand-accent: #33c482;
   --brand-accent-hover: #2dac72;
+  --brand-secondary: #33b4ff;
+  --surface-inverted: #1b1b1b;
+  --surface-inverted-hover: #363636;
+  --border-inverted: #363636;
+  --border-muted: #e4e4e4;
   --badge-success-bg: #bbf7d0;
   --badge-success-text: #15803d;
   --badge-blue-bg: #bfdbfe;
@@ -102,8 +108,14 @@ body {
   --text-icon: #a0a0a0;
   --text-inverse: #1b1b1b;
   --text-error: #ef4444;
+  --text-muted-inverse: #b3b3b3;
   --brand-accent: #33c482;
   --brand-accent-hover: #2dac72;
+  --brand-secondary: #33b4ff;
+  --surface-inverted: #242424;
+  --surface-inverted-hover: #363636;
+  --border-inverted: #3d3d3d;
+  --border-muted: #424242;
   --badge-success-bg: rgba(34, 197, 94, 0.2);
   --badge-success-text: #86efac;
   --badge-blue-bg: rgba(59, 130, 246, 0.2);

apps/docs/components/navbar/navbar.tsx

@@ -1,8 +1,8 @@
 'use client'
 
+import { ChipLink } from '@sim/emcn'
 import Link from 'next/link'
 import { usePathname } from 'next/navigation'
-import { ChipLink } from '@/components/ui/chip'
 import { LanguageDropdown } from '@/components/ui/language-dropdown'
 import { SearchTrigger } from '@/components/ui/search-trigger'
 import { SimLogoFull } from '@/components/ui/sim-logo'

apps/docs/components/page-actions.tsx

@@ -1,8 +1,8 @@
 'use client'
 
+import { Chip } from '@sim/emcn'
 import { useCopyButton } from 'fumadocs-ui/utils/use-copy-button'
 import { Check, Copy } from 'lucide-react'
-import { Chip } from '@/components/ui/chip'
 
 export function LLMCopyButton({ content }: { content: string }) {
   const [checked, onClick] = useCopyButton(() => navigator.clipboard.writeText(content))