Fix 500 error, add Address/Contact placeholders, and enhance Person activity view

- Fixed broken import path in /core dashboard
- Simplified core layout data requirements to prevent crashes
- Implemented V3 CRUD and Dexie tables for Addresses and Contacts
- Created placeholder management pages for /core/addresses and /core/contacts
- Added 'Linked Activity & Content' section to Person detail page to show related events and posts

src/routes/core/+layout.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
     import { ae_loc, ae_sess, ae_api, slct } from '$lib/stores/ae_stores';
-    import { Building, Globe, Users, ShieldCheck, List, LayoutDashboard } from 'lucide-svelte';
+    import { Building, Globe, Users, ShieldCheck, List, LayoutDashboard, MapPin, Phone } from 'lucide-svelte';
 
     interface Props {
         data: any;
@@ -31,6 +31,12 @@
             <a href="/core/people" class="btn btn-sm variant-soft-warning">
                 <Users size={14} class="mr-1" /> People
             </a>
+            <a href="/core/addresses" class="btn btn-sm variant-soft-surface">
+                <MapPin size={14} class="mr-1" /> Addresses
+            </a>
+            <a href="/core/contacts" class="btn btn-sm variant-soft-surface">
+                <Phone size={14} class="mr-1" /> Contacts
+            </a>
             <a href="/core/lookups" class="btn btn-sm variant-soft-surface">
                 <List size={14} class="mr-1" /> Lookups
             </a>