flutter: Add code for developer mode

src/ui/flutter_app/lib/widgets/game_page.dart

@@ -662,6 +662,7 @@ class _GamePageState extends State<GamePage> with RouteAware {
         ],
       ),
       onPressed: () {
+        if (Config.developerMode) return;
         Game.instance.regret(steps: 2);
         setState(() {});
       },

src/ui/flutter_app/lib/widgets/game_settings_page.dart

@@ -69,6 +69,7 @@ class _GameSettingsPageState extends State<GameSettingsPage> {
   restoreFactoryDefaultSettings() async {
     confirm() async {
       Navigator.of(context).pop();
+      if (Config.developerMode) return;
       final profile = await Settings.instance();
       await profile.restore();
       exit(0);
@@ -189,19 +190,6 @@ class _GameSettingsPageState extends State<GameSettingsPage> {
         ],
       ),
       SizedBox(height: AppTheme.sizedBoxHeight),
-      Text(S.of(context).forDevelopers, style: AppTheme.settingsHeaderStyle),
-      SettingsCard(
-        context: context,
-        children: <Widget>[
-          SettingsSwitchListTile(
-            context: context,
-            value: Config.developerMode,
-            onChanged: setDeveloperMode,
-            titleString: S.of(context).developerMode,
-          ),
-        ],
-      ),
-      SizedBox(height: AppTheme.sizedBoxHeight),
       Text(S.of(context).restore, style: AppTheme.settingsHeaderStyle),
       SettingsCard(
         context: context,
@@ -214,6 +202,19 @@ class _GameSettingsPageState extends State<GameSettingsPage> {
           ListItemDivider(),
         ],
       ),
+      SizedBox(height: AppTheme.sizedBoxHeight),
+      Text(S.of(context).forDevelopers, style: AppTheme.settingsHeaderStyle),
+      SettingsCard(
+        context: context,
+        children: <Widget>[
+          SettingsSwitchListTile(
+            context: context,
+            value: Config.developerMode,
+            onChanged: setDeveloperMode,
+            titleString: S.of(context).developerMode,
+          ),
+        ],
+      ),
     ];
   }
 

src/ui/flutter_app/lib/widgets/home_drawer.dart

@@ -23,6 +23,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:sanmill/generated/l10n.dart';
 import 'package:sanmill/style/app_theme.dart';
+import 'package:sanmill/common/config.dart';
 
 enum DrawerIndex {
   humanVsAi,
@@ -181,6 +182,10 @@ class _HomeDrawerState extends State<HomeDrawer> {
         color: AppTheme.exitIconColor,
       ),
       onTap: () async {
+        if (Config.developerMode) {
+          return;
+        }
+
         await SystemChannels.platform.invokeMethod<void>('SystemNavigator.pop');
       },
     );

src/ui/flutter_app/lib/widgets/navigation_home_screen.dart

@@ -19,6 +19,7 @@
 import 'package:flutter/material.dart';
 import 'package:sanmill/engine/engine.dart';
 import 'package:sanmill/mill/game.dart';
+import 'package:sanmill/common/config.dart';
 import 'package:sanmill/style/app_theme.dart';
 import 'package:sanmill/widgets/about_page.dart';
 import 'package:sanmill/widgets/drawer_user_controller.dart';
@@ -104,11 +105,11 @@ class _NavigationHomeScreenState extends State<NavigationHomeScreen> {
       setState(() {
         screenView = PersonalizationSettingsPage();
       });
-    } else if (drawerIndex == DrawerIndex.Help) {
+    } else if (drawerIndex == DrawerIndex.Help && !Config.developerMode) {
       setState(() {
         screenView = HelpScreen();
       });
-    } else if (drawerIndex == DrawerIndex.About) {
+    } else if (drawerIndex == DrawerIndex.About && !Config.developerMode) {
       setState(() {
         screenView = AboutPage();
       });