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/InputGroup.tsx

@@ -0,0 +1,54 @@
+import { CopyIcon, GlobeIcon, MagnifyingGlassIcon } from "@phosphor-icons/react";
+import {
+	InputGroup,
+	InputGroupAddon,
+	InputGroupButton,
+	InputGroupInput,
+	InputGroupText,
+	InputGroupTextarea,
+} from "@reactive-resume/ui/components/input-group";
+
+const wrap: React.CSSProperties = { display: "flex", flexDirection: "column", gap: 16, padding: 16, width: 380 };
+
+export const Addons = () => (
+	<div style={wrap}>
+		<InputGroup>
+			<InputGroupAddon>
+				<MagnifyingGlassIcon />
+			</InputGroupAddon>
+			<InputGroupInput placeholder="Search resumes" defaultValue="Product Designer" />
+		</InputGroup>
+
+		<InputGroup>
+			<InputGroupAddon>
+				<GlobeIcon />
+				<InputGroupText>rxresu.me/u/</InputGroupText>
+			</InputGroupAddon>
+			<InputGroupInput defaultValue="jordan-rivera" />
+		</InputGroup>
+
+		<InputGroup>
+			<InputGroupInput readOnly defaultValue="rxr_live_9f3c8a21bd47e50a" />
+			<InputGroupAddon align="inline-end">
+				<InputGroupButton size="icon-sm" aria-label="Copy API key">
+					<CopyIcon />
+				</InputGroupButton>
+			</InputGroupAddon>
+		</InputGroup>
+	</div>
+);
+
+export const WithTextarea = () => (
+	<div style={wrap}>
+		<InputGroup>
+			<InputGroupTextarea
+				rows={3}
+				defaultValue="Senior product designer focused on design systems, accessibility, and shipping polished interfaces."
+			/>
+			<InputGroupAddon align="block-end">
+				<InputGroupText>240 characters left</InputGroupText>
+				<InputGroupButton style={{ marginLeft: "auto" }}>Generate with AI</InputGroupButton>
+			</InputGroupAddon>
+		</InputGroup>
+	</div>
+);