Implement husband-wife connection dialogue and theme support for learn articles

lib/models/cycle_entry.dart

@@ -166,7 +166,13 @@ class CycleEntry extends HiveObject {
   String? husbandNotes; // Separate notes for husband
 
   @HiveField(29)
-  bool? intimacyProtected; // null = no intimacy, true = protected, false = unprotected
+  bool? intimacyProtected; // null = no selection, true = protected, false = unprotected
+
+  @HiveField(30, defaultValue: false)
+  bool usedPantyliner;
+
+  @HiveField(31, defaultValue: 0)
+  int pantylinerCount;
 
   CycleEntry({
     required this.id,
@@ -199,6 +205,8 @@ class CycleEntry extends HiveObject {
     required this.createdAt,
     required this.updatedAt,
     this.husbandNotes,
+    this.usedPantyliner = false,
+    this.pantylinerCount = 0,
   });
 
   List<bool> get _symptomsList => [
@@ -261,6 +269,8 @@ class CycleEntry extends HiveObject {
     DateTime? createdAt,
     DateTime? updatedAt,
     String? husbandNotes,
+    bool? usedPantyliner,
+    int? pantylinerCount,
   }) {
     return CycleEntry(
       id: id ?? this.id,
@@ -293,6 +303,8 @@ class CycleEntry extends HiveObject {
       createdAt: createdAt ?? this.createdAt,
       updatedAt: updatedAt ?? DateTime.now(),
       husbandNotes: husbandNotes ?? this.husbandNotes,
+      usedPantyliner: usedPantyliner ?? this.usedPantyliner,
+      pantylinerCount: pantylinerCount ?? this.pantylinerCount,
     );
   }
 }