feat(ui): add DocumentStatusChip — dot-only status indicator, hidden md:block

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/lib/components/DocumentStatusChip.svelte

@@ -0,0 +1,20 @@
+<script lang="ts">
+import { statusDotClass, statusLabel } from '$lib/utils/personFormat';
+
+type DocumentStatus = 'PLACEHOLDER' | 'UPLOADED' | 'TRANSCRIBED' | 'REVIEWED' | 'ARCHIVED';
+
+type Props = {
+	status: DocumentStatus;
+};
+
+let { status }: Props = $props();
+
+const dotClass = $derived(statusDotClass(status));
+const label = $derived(statusLabel(status));
+</script>
+
+<span
+	class="hidden shrink-0 md:block {dotClass} h-2.5 w-2.5 rounded-full"
+	title={label}
+	aria-label={label}
+></span>