chore(design-sync): add Reactive Resume UI sync inputs (#3216)

* chore(design-sync): add Reactive Resume UI sync inputs

Sync inputs for the claude.ai/design "Reactive Resume" project — the
@reactive-resume/ui design system (39 primary components).

- .design-sync/config.json — converter config (synth-entry, 202->39 card
  prune, overlay/grid cardMode overrides, cssEntry, tsconfig, buildCmd)
- .design-sync/build-css.mjs + tw-entry.css — compile Tailwind v4 globals.css
  to a self-contained stylesheet (inlined IBM Plex font), emit real .d.ts,
  and create the workspace self-symlink the converter needs
- .design-sync/previews/*.tsx — 39 authored preview compositions
- .design-sync/conventions.md — design-agent usage header (readmeHeader)
- .design-sync/NOTES.md — re-sync notes, gotchas, and risks
- packages/ui/tsconfig.emit.json — declaration emit for real prop contracts

Build artifacts (dist/types, .ds-compiled.css, ds-bundle, .cache) are gitignored.

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

* chore(knip): ignore .design-sync inputs and drop stale es-toolkit ignore

- Ignore .design-sync/** (design-sync tooling: build-css.mjs + authored
  previews are standalone, not part of the app import graph — knip --fix was
  deleting them and failing the autofix job).
- Remove es-toolkit from apps/server ignoreDependencies: it's now really used
  (apps/server/src/http/health.ts imports withTimeout), so the ignore is stale.

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

.design-sync/previews/Attachment.tsx

@@ -0,0 +1,83 @@
+import { DownloadSimpleIcon, FileDocIcon, FilePdfIcon, TrashIcon, WarningIcon } from "@phosphor-icons/react";
+import {
+	Attachment,
+	AttachmentAction,
+	AttachmentActions,
+	AttachmentContent,
+	AttachmentDescription,
+	AttachmentGroup,
+	AttachmentMedia,
+	AttachmentTitle,
+} from "@reactive-resume/ui/components/attachment";
+
+const wrap: React.CSSProperties = { display: "flex", flexDirection: "column", gap: 12, padding: 16, width: 360 };
+
+export const WithActions = () => (
+	<div style={wrap}>
+		<Attachment>
+			<AttachmentMedia>
+				<FilePdfIcon />
+			</AttachmentMedia>
+			<AttachmentContent>
+				<AttachmentTitle>Ansel_Bradford_Resume.pdf</AttachmentTitle>
+				<AttachmentDescription>248 KB · PDF</AttachmentDescription>
+			</AttachmentContent>
+			<AttachmentActions>
+				<AttachmentAction aria-label="Download">
+					<DownloadSimpleIcon />
+				</AttachmentAction>
+				<AttachmentAction aria-label="Remove">
+					<TrashIcon />
+				</AttachmentAction>
+			</AttachmentActions>
+		</Attachment>
+	</div>
+);
+
+export const States = () => (
+	<div style={wrap}>
+		<Attachment size="sm" state="uploading">
+			<AttachmentMedia>
+				<FileDocIcon />
+			</AttachmentMedia>
+			<AttachmentContent>
+				<AttachmentTitle>cover-letter.docx</AttachmentTitle>
+				<AttachmentDescription>Uploading…</AttachmentDescription>
+			</AttachmentContent>
+		</Attachment>
+		<Attachment size="sm" state="error">
+			<AttachmentMedia>
+				<WarningIcon />
+			</AttachmentMedia>
+			<AttachmentContent>
+				<AttachmentTitle>portfolio-2024.zip</AttachmentTitle>
+				<AttachmentDescription>Upload failed · file too large</AttachmentDescription>
+			</AttachmentContent>
+		</Attachment>
+	</div>
+);
+
+export const Group = () => (
+	<div style={{ padding: 16, width: 360 }}>
+		<AttachmentGroup>
+			<Attachment orientation="vertical" size="sm">
+				<AttachmentMedia>
+					<FilePdfIcon />
+				</AttachmentMedia>
+				<AttachmentContent>
+					<AttachmentTitle>Resume.pdf</AttachmentTitle>
+					<AttachmentDescription>248 KB</AttachmentDescription>
+				</AttachmentContent>
+			</Attachment>
+			<Attachment orientation="vertical" size="sm">
+				<AttachmentMedia>
+					<FileDocIcon />
+				</AttachmentMedia>
+				<AttachmentContent>
+					<AttachmentTitle>cover-letter.docx</AttachmentTitle>
+					<AttachmentDescription>19 KB</AttachmentDescription>
+				</AttachmentContent>
+			</Attachment>
+		</AttachmentGroup>
+	</div>
+);