fix: game phase db serialization

packages/db/lib/db.dart

@@ -681,15 +681,12 @@ class Database {
     if (result.isEmpty) {
       return null;
     }
-    return GamePhase.values.firstWhere(
-      (phase) => phase.name == result[0][0] as String,
-      orElse: () => throw ArgumentError('Unknown game phase: ${result[0][0]}'),
-    );
+    return GamePhase.fromJson(result[0][0] as String);
   }
 
   Future<void> setGamePhase(GamePhase phase) async {
     await executeSql('INSERT INTO config (key, value) VALUES (\'game_phase\', '
-        '\'$phase\') ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value');
+        '\'${phase.toJson()}\') ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value');
   }
 
   Future<String?> getAuthToken() async {

packages/types/lib/src/game_phase.dart

@@ -12,5 +12,14 @@ enum GamePhase with EnumIndexOrdering {
   exploration,
 
   /// Sell off all our ships and retire.
-  selloff
+  selloff;
+
+  static GamePhase fromJson(String json) {
+    // TODO(eseidel): Remove on next reset.
+    final value = json.startsWith('GamePhase.') ? json.substring(10) : json;
+    return values.firstWhere((e) => e.name == value,
+        orElse: () => throw ArgumentError('Invalid json for GamePhase'));
+  }
+
+  String toJson() => name;
 }

packages/types/test/src/game_phase_test.dart

@@ -0,0 +1,15 @@
+import 'package:test/test.dart';
+import "package:types/types.dart";
+
+void main() {
+  test('GamePhase json round trip', () {
+    final phase = GamePhase.bootstrap;
+    final json = phase.toJson();
+    final phase2 = GamePhase.fromJson(json);
+    expect(phase, phase2);
+
+    // Verify that our old JSON format still works, remove on next reset.
+    final phase3 = GamePhase.fromJson(phase.toString());
+    expect(phase, phase3);
+  });
+}