Fix Android issues

lib/pages/entry/entry_controller.dart

@@ -11,6 +11,8 @@ import 'package:gifunavi/services/api_service.dart';
 import 'package:gifunavi/pages/index/index_controller.dart';
 import 'package:timezone/timezone.dart' as tz;
 
+import '../../model/user.dart';
+
 class EntryController extends GetxController {
   late ApiService _apiService;
 
@@ -29,6 +31,8 @@ class EntryController extends GetxController {
 
   final activeEvents = <Event>[].obs;   //有効なイベントリスト
 
+  final teamMembers = <User>[].obs;
+
   @override
   void onInit() async {
     super.onInit();
@@ -98,12 +102,64 @@ class EntryController extends GetxController {
     }
   }
 
-  void updateTeam(Team? value) {
+  Future<void> fetchTeamMembers(int teamId) async {
+    try {
+      final members = await _apiService.getTeamMembers(teamId);
+      teamMembers.assignAll(members);
+    } catch (e) {
+      print('Error fetching team members: $e');
+      Get.snackbar('Error', 'Failed to fetch team members');
+    }
+  }
+
+  List<NewCategory> getFilteredCategories() {
+    if (selectedTeam.value == null) return [];
+
+    if (teamMembers.isEmpty) {
+      // ソロの場合
+      String baseCategory = selectedTeam.value!.members.first.female ? 'ソロ女子' : 'ソロ男子';
+      return categories.where((c) => c.categoryName.startsWith(baseCategory)).toList();
+    } else if (teamMembers.length == 1) {
+      // チームメンバーが1人の場合（ソロ）
+      String baseCategory = teamMembers.first.female ? 'ソロ女子' : 'ソロ男子';
+      return categories.where((c) => c.categoryName.startsWith(baseCategory)).toList();
+    } else {
+      // 複数人の場合
+      bool hasElementaryOrYounger = teamMembers.any(isElementarySchoolOrYounger);
+      String baseCategory = hasElementaryOrYounger ? 'ファミリー' : '一般';
+      return categories.where((c) => c.categoryName.startsWith(baseCategory)).toList();
+    }
+  }
+
+  bool isElementarySchoolOrYounger(User user) {
+    final now = DateTime.now();
+    final age = now.year - user.dateOfBirth!.year;
+    return age <= 12;
+  }
+
+  void updateTeam(Team? value) async {
+    selectedTeam.value = value;
+    if (value != null) {
+      await fetchTeamMembers(value.id);
+      final filteredCategories = getFilteredCategories();
+      if (filteredCategories.isNotEmpty) {
+        selectedCategory.value = filteredCategories.first;
+      } else {
+        selectedCategory.value = null;
+      }
+    } else {
+      teamMembers.clear();
+      selectedCategory.value = null;
+    }
+  }
+
+  void updateTeam_old(Team? value) {
     selectedTeam.value = value;
     if (value != null) {
       selectedCategory.value = value.category;
     }
   }
+
   //void updateTeam(Team? value) => selectedTeam.value = value;
   void updateCategory(NewCategory? value) => selectedCategory.value = value;
   //void updateDate(DateTime value) => selectedDate.value = value;

lib/pages/entry/entry_detail_page.dart

@@ -175,6 +175,20 @@ class EntryDetailPage extends GetView<EntryController> {
   }
 
   Widget _buildCategoryDropdown() {
+    final eligibleCategories = controller.getFilteredCategories();
+
+    return DropdownButtonFormField<NewCategory>(
+      decoration: InputDecoration(labelText: 'カテゴリ'),
+      value: controller.selectedCategory.value,
+      items: eligibleCategories.map((category) => DropdownMenuItem<NewCategory>(
+        value: category,
+        child: Text(category.categoryName),
+      )).toList(),
+      onChanged: (value) => controller.updateCategory(value),
+    );
+  }
+
+  Widget _buildCategoryDropdown_old() {
     final eligibleCategories = controller.categories.where((c) =>
     c.baseCategory == controller.selectedCategory.value?.baseCategory
     ).toList();