fix(design-sync): address CodeRabbit review on preview files

- Add `import type * as React from "react"` to the 26 previews that reference
  `React.CSSProperties` under the automatic JSX runtime (React isn't a global
  type namespace there, so the annotation was unresolved standalone).
- Accordion preview: use `multiple` instead of `openMultiple` — @base-ui/react
  1.6 renamed the prop, so the multi-open cell wasn't actually multi-open.

Skipped CodeRabbit's BrandIcon dark-mode note: the preview renders in the
default light card (the dark <img> is hidden there); per-theme sources would
need component support it doesn't expose.

Claude-Session: https://claude.ai/code/session_01R8Aq8F1nTuvJwfut7g3DVE

.design-sync/previews/Accordion.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Accordion, AccordionContent, AccordionItem, AccordionTrigger } from "@reactive-resume/ui/components/accordion";
 
 const wrap: React.CSSProperties = { width: 420, padding: 16 };
@@ -32,7 +33,7 @@ export const Sections = () => (
 
 export const MultipleOpen = () => (
 	<div style={wrap}>
-		<Accordion openMultiple defaultValue={["summary", "certifications"]}>
+		<Accordion multiple defaultValue={["summary", "certifications"]}>
 			<AccordionItem value="summary">
 				<AccordionTrigger>Professional Summary</AccordionTrigger>
 				<AccordionContent>

.design-sync/previews/Alert.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { InfoIcon, WarningIcon } from "@phosphor-icons/react";
 import { Alert, AlertAction, AlertDescription, AlertTitle } from "@reactive-resume/ui/components/alert";
 import { Button } from "@reactive-resume/ui/components/button";

.design-sync/previews/Attachment.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { DownloadSimpleIcon, FileDocIcon, FilePdfIcon, TrashIcon, WarningIcon } from "@phosphor-icons/react";
 import {
 	Attachment,

.design-sync/previews/Avatar.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { CheckIcon } from "@phosphor-icons/react";
 import {
 	Avatar,

.design-sync/previews/Badge.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { CheckCircleIcon, PencilSimpleIcon, SparkleIcon } from "@phosphor-icons/react";
 import { Badge } from "@reactive-resume/ui/components/badge";
 

.design-sync/previews/BrandIcon.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { BrandIcon } from "@reactive-resume/ui/components/brand-icon";
 
 // The component builds its src from /logo|/icon static paths that the preview

.design-sync/previews/Bubble.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Bubble, BubbleContent, BubbleGroup, BubbleReactions } from "@reactive-resume/ui/components/bubble";
 
 const wrap: React.CSSProperties = { display: "flex", flexDirection: "column", gap: 8, padding: 16, width: 420 };

.design-sync/previews/Button.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { ArrowRightIcon, PlusIcon, TrashIcon } from "@phosphor-icons/react";
 import { Button } from "@reactive-resume/ui/components/button";
 

.design-sync/previews/ButtonGroup.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import {
 	AlignCenterHorizontalIcon,
 	AlignLeftIcon,

.design-sync/previews/FormItem.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { FormControl, FormDescription, FormItem, FormLabel, FormMessage } from "@reactive-resume/ui/components/form";
 import { Input } from "@reactive-resume/ui/components/input";
 

.design-sync/previews/Input.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Input } from "@reactive-resume/ui/components/input";
 import { Label } from "@reactive-resume/ui/components/label";
 

.design-sync/previews/InputGroup.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { CopyIcon, GlobeIcon, MagnifyingGlassIcon } from "@phosphor-icons/react";
 import {
 	InputGroup,

.design-sync/previews/Kbd.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Kbd, KbdGroup } from "@reactive-resume/ui/components/kbd";
 
 const row: React.CSSProperties = { display: "flex", flexWrap: "wrap", alignItems: "center", gap: 12, padding: 20 };

.design-sync/previews/Label.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Input } from "@reactive-resume/ui/components/input";
 import { Label } from "@reactive-resume/ui/components/label";
 import { Switch } from "@reactive-resume/ui/components/switch";

.design-sync/previews/Marker.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { CheckCircleIcon, SparkleIcon, WarningCircleIcon } from "@phosphor-icons/react";
 import { Marker, MarkerContent, MarkerIcon } from "@reactive-resume/ui/components/marker";
 

.design-sync/previews/Message.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { SparkleIcon, UserIcon } from "@phosphor-icons/react";
 import { Bubble, BubbleContent } from "@reactive-resume/ui/components/bubble";
 import {

.design-sync/previews/MessageScroller.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { SparkleIcon, UserIcon } from "@phosphor-icons/react";
 import { Bubble, BubbleContent } from "@reactive-resume/ui/components/bubble";
 import { Message, MessageAvatar, MessageContent } from "@reactive-resume/ui/components/message";

.design-sync/previews/ResizableGroup.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { ResizableGroup, ResizablePanel, ResizableSeparator } from "@reactive-resume/ui/components/resizable";
 
 const panelStyle: React.CSSProperties = { height: "100%", padding: 16, fontSize: 14, lineHeight: 1.6 };

.design-sync/previews/ScrollArea.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { ScrollArea } from "@reactive-resume/ui/components/scroll-area";
 
 const templates = [

.design-sync/previews/Separator.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Separator } from "@reactive-resume/ui/components/separator";
 
 const block: React.CSSProperties = {

.design-sync/previews/Skeleton.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Skeleton } from "@reactive-resume/ui/components/skeleton";
 
 const pad: React.CSSProperties = { padding: 20 };

.design-sync/previews/Slider.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Label } from "@reactive-resume/ui/components/label";
 import { Slider } from "@reactive-resume/ui/components/slider";
 

.design-sync/previews/Spinner.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Spinner } from "@reactive-resume/ui/components/spinner";
 
 const row: React.CSSProperties = { display: "flex", alignItems: "center", gap: 20, padding: 24 };

.design-sync/previews/Switch.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Label } from "@reactive-resume/ui/components/label";
 import { Switch } from "@reactive-resume/ui/components/switch";
 

.design-sync/previews/Tabs.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { BriefcaseIcon, GraduationCapIcon, SparkleIcon } from "@phosphor-icons/react";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@reactive-resume/ui/components/tabs";
 

.design-sync/previews/Textarea.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import { Label } from "@reactive-resume/ui/components/label";
 import { Textarea } from "@reactive-resume/ui/components/textarea";
 

.design-sync/previews/Toggle.tsx

@@ -1,3 +1,4 @@
+import type * as React from "react";
 import {
 	TextAlignCenterIcon,
 	TextAlignLeftIcon,