Implement multi-screen app UI flow and navigation

lib/features/local/local_models.dart

@@ -0,0 +1,65 @@
+class PersonProfile {
+  const PersonProfile({
+    required this.id,
+    required this.name,
+    required this.relationship,
+    required this.affinityScore,
+    required this.nextMoment,
+    required this.tags,
+    required this.notes,
+  });
+
+  final String id;
+  final String name;
+  final String relationship;
+  final int affinityScore;
+  final DateTime nextMoment;
+  final List<String> tags;
+  final String notes;
+}
+
+class RelationshipMoment {
+  const RelationshipMoment({
+    required this.id,
+    required this.personId,
+    required this.title,
+    required this.summary,
+    required this.at,
+    required this.type,
+  });
+
+  final String id;
+  final String personId;
+  final String title;
+  final String summary;
+  final DateTime at;
+  final String type;
+}
+
+class DashboardTask {
+  const DashboardTask({
+    required this.title,
+    required this.description,
+    required this.when,
+    this.done = false,
+  });
+
+  final String title;
+  final String description;
+  final DateTime when;
+  final bool done;
+}
+
+class DashboardSummary {
+  const DashboardSummary({
+    required this.activePeople,
+    required this.upcomingPlans,
+    required this.pendingIdeas,
+    required this.weeklyConsistency,
+  });
+
+  final int activePeople;
+  final int upcomingPlans;
+  final int pendingIdeas;
+  final int weeklyConsistency;
+}