Add contacts features: tags, history, CSV import/export, merge, last-contacted; fix CalendarPage unused var; v1.1.23

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

src/CalendarPage.tsx

@@ -657,8 +657,7 @@ function CalendarClient() {
 
   // ── Render chip ──
 
-  function renderEpChip(ep: PodcastChecklistEpisode, dk: string) {
-    const isScheduled = ep.datePublished === dk
+  function renderEpChip(ep: PodcastChecklistEpisode, _dk: string) {
     return (
       <button
         key={ep.id}