Add Tier 2 email features: AI draft, Calendar→Email announce, delivery status, engagement badges; v1.1.24

- EmailPage: useLocation to accept pre-filled compose from Calendar; delivery status pill on sent bubbles; AI Draft button calling ANTHROPIC_API_KEY endpoint
- CalendarPage: useNavigate + announceEpisode(); ✉ Announce button in episode edit popover
- ContactsPage: emailStatus types; unreplied badge; best delivery status pill; engagement score stars
- server/routes/contact.js: POST /api/admin-contact-submissions/:id/draft-reply → Anthropic claude-haiku-4-5

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

src/App.css

@@ -10706,6 +10706,45 @@
   width: 100%;
 }
 
+/* Delivery status pills (contacts page) */
+.ct-delivery-pill {
+  border-radius: 10px;
+  font-size: 0.7rem;
+  font-weight: 500;
+  padding: 0.15rem 0.5rem;
+}
+
+.ct-delivery-pill--clicked { background: #1a2e1a; color: #4ade80; }
+.ct-delivery-pill--opened  { background: #1a2535; color: #60a5fa; }
+.ct-delivery-pill--delivered { background: #1e1e1e; color: #a0a0a0; }
+.ct-delivery-pill--sent    { background: #1a1a1a; color: #6b6560; }
+
+.ct-badge--unreplied {
+  background: #3d1a0a;
+  color: #fb923c;
+}
+
+.ct-engage-badge {
+  color: #f59e0b;
+  font-size: 0.75rem;
+  letter-spacing: -1px;
+}
+
+/* Delivery status pills (email page) */
+.em-delivery-pill {
+  border-radius: 10px;
+  font-size: 0.7rem;
+  font-weight: 500;
+  padding: 0.15rem 0.5rem;
+  white-space: nowrap;
+}
+
+.em-delivery-pill--clicked   { background: #1a2e1a; color: #4ade80; }
+.em-delivery-pill--opened    { background: #1a2535; color: #60a5fa; }
+.em-delivery-pill--delivered { background: #1e1e1e; color: #a0a0a0; }
+.em-delivery-pill--sent      { background: #1a1a1a; color: #6b6560; }
+.em-delivery-pill--bounced   { background: #2e1a1a; color: #f87171; }
+
 /* Flash message */
 .ct-flash {
   background: #1a2a1a;