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/FormItem.tsx

@@ -0,0 +1,26 @@
+import { FormControl, FormDescription, FormItem, FormLabel, FormMessage } from "@reactive-resume/ui/components/form";
+import { Input } from "@reactive-resume/ui/components/input";
+
+// FormItem carries its own field context (id + error state) — FormLabel /
+// FormControl / FormDescription / FormMessage compose under it standalone.
+const wrap: React.CSSProperties = { display: "flex", flexDirection: "column", gap: 16, padding: 16, width: 340 };
+
+export const Default = () => (
+	<div style={wrap}>
+		<FormItem>
+			<FormLabel>Headline</FormLabel>
+			<FormControl render={<Input placeholder="Senior Software Engineer" />} />
+			<FormDescription>Shown under your name at the top of the resume.</FormDescription>
+		</FormItem>
+	</div>
+);
+
+export const WithError = () => (
+	<div style={wrap}>
+		<FormItem hasError>
+			<FormLabel>Email</FormLabel>
+			<FormControl render={<Input defaultValue="jane@" />} />
+			<FormMessage errors={["Enter a valid email address."]} />
+		</FormItem>
+	</div>
+);