Align Care header with other Ladill apps.

Add Afia and notifications to the top bar, remove the duplicate desktop page
title, wire notification and AI routes, and fix mobile nav notification links.

Co-authored-by: Cursor <cursoragent@cursor.com>

.env.example

@@ -29,6 +29,11 @@ BILLING_API_KEY_CARE=
 IDENTITY_API_URL=https://ladill.com/api
 IDENTITY_API_KEY_CARE=
 
+# Afia in-app assistant (uses platform relay when AFIA_API_KEY is empty)
+AFIA_ENABLED=true
+AFIA_PRODUCT=care
+AFIA_PLATFORM_API_KEY=
+
 # Platform events webhook (user/org lifecycle from the monolith)
 SERVICE_EVENTS_INBOUND_SECRET=