fix(box): flatten fontSize/fontWeight/lineHeight token groups; add changeset

The editorial typography tokens nest an `editorial.*` sub-namespace under
fontSize, fontWeight, and lineHeight. Box's rainbow-sprinkles passed these
groups straight into defineProperties, which expects a flat
Record<string, string>, so the nested objects broke its overload typing —
cascading into BoxProps and every <Box> consumer (preview, stories, specs)
failing Type Check.

Flatten those three groups via `flat` (the same treatment the `font`
typography group already gets), so editorial.* tokens become flat keys and
defineProperties typing holds. Also adds the missing changeset for the
@launchpad-ui/tokens + @launchpad-ui/box changes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: OneHunnid

.changeset/editorial-typography-tokens.md

@@ -0,0 +1,8 @@
+---
+'@launchpad-ui/tokens': minor
+'@launchpad-ui/box': patch
+---
+
+Add a Sora-based editorial typography token family for brand-themed surfaces (empty states, hero moments, announcements). Adds `fontFamily.sora` (with an Inter fallback), pixel-named `fontSize.editorial.*`, `fontWeight.editorial.*`, unitless `lineHeight.editorial.*`, a new top-level `letterSpacing.editorial.*` group, seven `text.editorial.*` compositions, and `size.30`/`size.50` primitives. All values mirror the `ai-refresh` `_typography.scss` source of truth. Existing utility `text.*` compositions are unchanged.
+
+Box's `rainbow-sprinkles` now flattens the `fontSize`, `fontWeight`, and `lineHeight` token groups (matching how the `font` typography group is already handled) so the nested `editorial.*` sub-namespaces don't break `defineProperties`' flat-record typing.

packages/box/src/styles/rainbow-sprinkles.css.ts

@@ -5,7 +5,7 @@ import { createRainbowSprinkles, defineProperties } from 'rainbow-sprinkles';
 
 // biome-ignore lint/correctness/noUnusedVariables: ignore
 const { bg, border, fill, shadow, text, ...global } = vars.color;
-const { text: typography, gradient } = vars;
+const { text: typography, gradient, fontSize, fontWeight, lineHeight } = vars;
 
 type FlattenObjectKeys<T extends Record<string, unknown>, Key = keyof T> = Key extends string
 	? T[Key] extends Record<string, unknown>
@@ -19,13 +19,19 @@ type BorderKeys = FlattenObjectKeys<typeof border>;
 type FillKeys = FlattenObjectKeys<typeof fill>;
 type TextKeys = FlattenObjectKeys<typeof text>;
 type TypographyKeys = FlattenObjectKeys<typeof typography>;
+type FontSizeKeys = FlattenObjectKeys<typeof fontSize>;
+type FontWeightKeys = FlattenObjectKeys<typeof fontWeight>;
+type LineHeightKeys = FlattenObjectKeys<typeof lineHeight>;
 
 const colors = flatten<typeof global, Record<GlobalKeys, string>>(global);
 const backgrounds = flatten<typeof bg, Record<BackgroundKeys, string>>(bg);
 const borders = flatten<typeof border, Record<BorderKeys, string>>(border);
 const fills = flatten<typeof fill, Record<FillKeys, string>>(fill);
 const texts = flatten<typeof text, Record<TextKeys, string>>(text);
 const typographies = flatten<typeof typography, Record<TypographyKeys, string>>(typography);
+const fontSizes = flatten<typeof fontSize, Record<FontSizeKeys, string>>(fontSize);
+const fontWeights = flatten<typeof fontWeight, Record<FontWeightKeys, string>>(fontWeight);
+const lineHeights = flatten<typeof lineHeight, Record<LineHeightKeys, string>>(lineHeight);
 
 const responsiveProperties = defineProperties({
 	conditions: {
@@ -70,9 +76,9 @@ const responsiveProperties = defineProperties({
 		borderWidth: vars.borderWidth,
 		font: typographies,
 		fontFamily: vars.fontFamily,
-		fontSize: vars.fontSize,
-		fontWeight: vars.fontWeight,
-		lineHeight: vars.lineHeight,
+		fontSize: fontSizes,
+		fontWeight: fontWeights,
+		lineHeight: lineHeights,
 		width: vars.size,
 		height: vars.size,
 		maxHeight: vars.size,