Add LLM digest setup and share timestamp context

lib/app/data/relationship_repository_ai_digest.dart

@@ -66,7 +66,7 @@ extension LocalRepositoryAiDigestOperations on LocalRepository {
               ? IdeaType.gift
               : IdeaType.event,
           title: draft.title,
-          details: _aiDraftDetails(draft),
+          details: _aiIdeaDetails(draft),
           createdAt: now,
         );
         await _setState(
@@ -156,6 +156,18 @@ String _aiDraftDetails(AiSuggestionDraft draft) {
   return '${draft.details.trim()}$reason'.trim();
 }
 
+String _aiIdeaDetails(AiSuggestionDraft draft) {
+  final List<String> parts = <String>[
+    _aiDraftDetails(draft),
+    if (draft.eventLocation != null && draft.eventLocation!.trim().isNotEmpty)
+      'Location: ${draft.eventLocation!.trim()}',
+    if (draft.eventUrl != null && draft.eventUrl!.trim().isNotEmpty)
+      'Event: ${draft.eventUrl!.trim()}',
+    if (draft.sourceUrls.isNotEmpty) 'Sources: ${draft.sourceUrls.join(', ')}',
+  ].where((String value) => value.trim().isNotEmpty).toList(growable: false);
+  return parts.join('\n\n').trim();
+}
+
 extension<T> on Iterable<T> {
   T? get firstOrNull => isEmpty ? null : first;
 }