fix(korrespondenz): dark theme, compact strip labels, year divider size, chevron alignment

- Add compact prop to PersonTypeahead: 7px uppercase label, 30px h input (matches spec FL/FI)
- Replace all hardcoded hex in 6 korrespondenz components with theme tokens (bg-surface,
  bg-muted, bg-canvas, border-line, text-ink, text-primary, text-accent, etc.)
- Fix year divider: text-[15px] font-black (spec: 15px/900)
- Fix log row chevron: items-center instead of items-start for vertical centering
- Fix recent-persons persistence: move persistRecentPerson to post-navigation $effect so
  senderName is resolved from server before stored in localStorage
- Add metadataComplete field to makeDoc() fixture to satisfy updated Document type
- Restore opacity-0 on swap button when only one person is set (matches spec + test)

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

frontend/src/routes/korrespondenz/+page.svelte

@@ -21,7 +21,7 @@ let sortDir = $state(untrack(() => data.filters.dir));
 let senderName = $state(untrack(() => data.initialValues.senderName));
 let receiverName = $state(untrack(() => data.initialValues.receiverName));
 
-// Sync with server data after navigation
+// Sync with server data after navigation; persist recent persons once the name is resolved
 $effect(() => {
 	senderId = data.filters.senderId;
 	receiverId = data.filters.receiverId;
@@ -30,6 +30,9 @@ $effect(() => {
 	sortDir = data.filters.dir;
 	senderName = data.initialValues.senderName;
 	receiverName = data.initialValues.receiverName;
+	if (data.filters.senderId && data.initialValues.senderName) {
+		persistRecentPerson(data.filters.senderId, data.initialValues.senderName);
+	}
 });
 
 const isSinglePerson = $derived(!!senderId && !receiverId);
@@ -51,9 +54,6 @@ function persistRecentPerson(id: string, name: string) {
 }
 
 function applyFilters() {
-	// Persist to recent persons when a person is selected
-	if (senderId && senderName) persistRecentPerson(senderId, senderName);
-
 	const params = new SvelteURLSearchParams();
 	if (senderId) params.set('senderId', senderId);
 	if (receiverId) params.set('receiverId', receiverId);