Add LLM digest setup and share timestamp context

lib/features/ai_digest/application/anonymized_llm_context_builder.dart

@@ -4,6 +4,7 @@ import 'dart:math' as math;
 import 'package:relationship_saver/app/state/local_data_state.dart';
 import 'package:relationship_saver/features/ai_digest/domain/ai_digest_models.dart';
 import 'package:relationship_saver/features/people/domain/person_models.dart';
+import 'package:relationship_saver/features/share_intake/domain/share_models.dart';
 
 class AnonymizedLlmDigestContext {
   const AnonymizedLlmDigestContext({
@@ -23,12 +24,14 @@ class AnonymizedLlmContextBuilder {
   const AnonymizedLlmContextBuilder({
     this.maxPeople = 20,
     this.maxSignalsPerPerson = 8,
+    this.maxFactsPerPerson = 8,
     this.maxPriorSuggestionsPerPerson = 6,
     DateTime Function()? now,
   }) : _now = now ?? DateTime.now;
 
   final int maxPeople;
   final int maxSignalsPerPerson;
+  final int maxFactsPerPerson;
   final int maxPriorSuggestionsPerPerson;
   final DateTime Function() _now;
 
@@ -69,7 +72,11 @@ class AnonymizedLlmContextBuilder {
           'Do not infer or ask for names.',
           'Return JSON only.',
           'Prefer practical suggestions that can be reviewed before saving.',
+          'Use web search for current event recommendations and include source URLs.',
+          'Only suggest real upcoming events with verified date and venue details.',
           'Do not repeat priorSuggestions for the same personToken.',
+          'When shared_message_datetime is present, treat it as the point-in-time reference for that evidence.',
+          'Do not turn old health/status evidence into a current check-in; preserve durable preferences instead.',
         ],
         'limits': <String, dynamic>{
           'maxItems': 10,
@@ -188,10 +195,81 @@ class AnonymizedLlmContextBuilder {
             .map((PersonPreferenceSignal signal) => 'avoid ${signal.label}')
             .toList(growable: false),
       ).take(maxSignalsPerPerson).toList(growable: false),
+      'preferenceSignals': _preferenceSignals(signals, now),
+      'capturedFacts': _capturedFacts(state, person, now),
       'priorSuggestions': _priorSuggestions(state, person),
     };
   }
 
+  List<Map<String, String>> _capturedFacts(
+    LocalDataState state,
+    PersonProfile person,
+    DateTime now,
+  ) {
+    final List<String> identityTerms = _identityTerms(state);
+    final Map<String, DateTime> sharedMessageTimes = _sharedMessageTimes(state);
+    return state.personFacts
+        .where(
+          (PersonFact fact) =>
+              fact.personId == person.id &&
+              !fact.isSensitive &&
+              !fact.needsReview &&
+              fact.text.trim().isNotEmpty,
+        )
+        .take(maxFactsPerPerson)
+        .map((PersonFact fact) {
+          final DateTime? sharedMessageDateTime = fact.sharedMessageId == null
+              ? null
+              : sharedMessageTimes[fact.sharedMessageId];
+          return <String, String>{
+            'type': _factTypeLabel(fact.type),
+            if (_safeContextText(fact.label, identityTerms).isNotEmpty)
+              'label': _safeContextText(fact.label, identityTerms),
+            'summary': _safeContextText(fact.text, identityTerms),
+            if (sharedMessageDateTime != null) ...<String, String>{
+              'shared_message_datetime': sharedMessageDateTime
+                  .toUtc()
+                  .toIso8601String(),
+              'sourceAge': _ageLabel(sharedMessageDateTime, now),
+            },
+          };
+        })
+        .where(
+          (Map<String, String> fact) =>
+              fact['summary'] != null && fact['summary']!.isNotEmpty,
+        )
+        .toList(growable: false);
+  }
+
+  List<Map<String, String>> _preferenceSignals(
+    List<PersonPreferenceSignal> signals,
+    DateTime now,
+  ) {
+    return signals
+        .map(
+          (PersonPreferenceSignal signal) => <String, String>{
+            'label': _safeCategory(signal.label),
+            'category': _safeCategory(signal.category),
+            'polarity': signal.polarity == PreferenceSignalPolarity.dislike
+                ? 'dislike'
+                : 'like',
+            'lastObserved': signal.lastSeenAt.toUtc().toIso8601String(),
+            'sourceAge': _ageLabel(signal.lastSeenAt, now),
+          },
+        )
+        .where((Map<String, String> signal) => signal['label']!.isNotEmpty)
+        .take(maxSignalsPerPerson)
+        .toList(growable: false);
+  }
+
+  Map<String, DateTime> _sharedMessageTimes(LocalDataState state) {
+    return <String, DateTime>{
+      for (final SharedMessageEntry entry in state.sharedMessages)
+        if (entry.sharedMessageDateTime != null)
+          entry.id: entry.sharedMessageDateTime!,
+    };
+  }
+
   List<Map<String, String>> _priorSuggestions(
     LocalDataState state,
     PersonProfile person,
@@ -272,6 +350,18 @@ class AnonymizedLlmContextBuilder {
     return 'last contact about $days days ago';
   }
 
+  String _ageLabel(DateTime value, DateTime now) {
+    final int days = now.difference(value).inDays;
+    if (days <= 1) {
+      return 'current or recent';
+    }
+    if (days < 45) {
+      return 'about $days days ago';
+    }
+    final int months = (days / 30).round().clamp(2, 24).toInt();
+    return 'about $months months ago';
+  }
+
   List<String> _safeList(Iterable<String> values) {
     final List<String> out = <String>[];
     final Set<String> seen = <String>{};
@@ -297,6 +387,58 @@ class AnonymizedLlmContextBuilder {
         .toLowerCase();
   }
 
+  String _safeContextText(String? value, List<String> identityTerms) {
+    if (value == null) {
+      return '';
+    }
+    String safe = value.trim().replaceAll(RegExp(r'https?://\S+'), '');
+    for (final String term in identityTerms) {
+      safe = safe.replaceAll(
+        RegExp(RegExp.escape(term), caseSensitive: false),
+        'this person',
+      );
+    }
+    return safe
+        .replaceAll(RegExp(r'[\r\n\t]+'), ' ')
+        .replaceAll(RegExp(r'[^a-zA-Z0-9 .,;:!?+&%$#@()\-/]+'), '')
+        .replaceAll(RegExp(r'\s+'), ' ')
+        .trim()
+        .toLowerCase();
+  }
+
+  List<String> _identityTerms(LocalDataState state) {
+    final Set<String> terms = <String>{};
+    for (final PersonProfile person in state.people) {
+      for (final String raw in <String>[person.name, ...person.aliases]) {
+        final String term = raw.trim();
+        if (term.length >= 3) {
+          terms.add(term);
+        }
+        for (final String part in term.split(RegExp(r'\s+'))) {
+          if (part.length >= 3) {
+            terms.add(part);
+          }
+        }
+      }
+    }
+    final List<String> sorted = terms.toList(growable: false)
+      ..sort((String a, String b) => b.length.compareTo(a.length));
+    return sorted;
+  }
+
+  String _factTypeLabel(CapturedFactType type) {
+    return switch (type) {
+      CapturedFactType.note => 'note',
+      CapturedFactType.like => 'like',
+      CapturedFactType.dislike => 'dislike',
+      CapturedFactType.importantDate => 'important date',
+      CapturedFactType.giftIdea => 'gift idea',
+      CapturedFactType.placeIdea => 'place idea',
+      CapturedFactType.activityIdea => 'activity idea',
+      CapturedFactType.misc => 'misc',
+    };
+  }
+
   int _daysUntil(DateTime date, DateTime now) {
     return date.difference(DateTime(now.year, now.month, now.day)).inDays;
   }