Add event/organisation location with Google Maps links

Events and the organisation profile now have an address, with a
"Directions" link and an embedded Google Maps view (no API key
required) shown on event pages, event cards, and the Contact page.
New events default their location to the org's configured address.

frontend/src/app/events/[id]/page.tsx

@@ -3,6 +3,7 @@ import { Navbar } from "@/components/layout/Navbar";
 import { Footer } from "@/components/layout/Footer";
 import ClientActions from "@/app/events/[id]/ClientActions";
 import { ContactButton } from "@/components/events/ContactButton";
+import { LocationMap } from "@/components/events/LocationMap";
 import { Calendar, Ticket, Paperclip, Sparkles } from "lucide-react";
 
 export const revalidate = 60;
@@ -37,6 +38,7 @@ type Event = {
   contactName?: string | null;
   contactPhone?: string | null;
   contactEmail?: string | null;
+  location?: string | null;
 };
 
 import { apiFetch, ApiError } from "@/lib/api";
@@ -142,6 +144,13 @@ export default async function EventDetailPage({ params }: { params: Promise<{ id
 
             <p className="text-gray-700 whitespace-pre-line">{event.description}</p>
 
+            {event.location && (
+              <div className="border rounded-xl p-5 bg-white shadow-sm">
+                <h2 className="text-base font-semibold text-gray-900 mb-3">Location</h2>
+                <LocationMap address={event.location} />
+              </div>
+            )}
+
             {event.attachments && event.attachments.length > 0 && (
               <div className="border rounded-xl p-5 bg-white shadow-sm">
                 <div className="flex items-center gap-2 mb-3">