feat: 42kit Nav

feat: Animation Optimization

lib/ui/nav/nav_state.dart

@@ -0,0 +1,41 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:starcitizen_doctor/api/udb.dart';
+import 'package:starcitizen_doctor/data/nav_api_data.dart';
+
+part 'nav_state.freezed.dart';
+
+part 'nav_state.g.dart';
+
+@freezed
+class NavState with _$NavState {
+  const factory NavState({
+    List<NavApiDocsItemData>? items,
+    @Default("") String errorInfo,
+  }) = _NavState;
+}
+
+@riverpod
+class Nav extends _$Nav {
+  bool _mounted = true;
+
+  @override
+  NavState build() {
+    state = NavState();
+    loadData(1);
+    ref.onDispose(() {
+      _mounted = false;
+    });
+    return state;
+  }
+
+  void loadData(int pageNo) async {
+    if (!_mounted) return;
+    try {
+      final r = await UDBNavApi.getNavItems(pageNo: pageNo);
+      state = state.copyWith(items: r.docs, errorInfo: "");
+    } catch (e) {
+      state = state.copyWith(errorInfo: e.toString());
+    }
+  }
+}