Fix typo backgroundColor

src/ui/flutter_app/lib/l10n/intl_de.arb

@@ -572,8 +572,8 @@
   "@pieceColor": {
     "description": "Piece color"
   },
-  "backgroudColor": "Hintergrundfarbe",
-  "@backgroudColor": {
+  "backgroundColor": "Hintergrundfarbe",
+  "@backgroundColor": {
     "description": "Background color"
   },
   "lineColor": "Linienfarbe",

src/ui/flutter_app/lib/l10n/intl_en.arb

@@ -572,8 +572,8 @@
   "@pieceColor": {
     "description": "Piece color"
   },
-  "backgroudColor": "Background color",
-  "@backgroudColor": {
+  "backgroundColor": "Background color",
+  "@backgroundColor": {
     "description": "Background color"
   },
   "lineColor": "Board line color",

src/ui/flutter_app/lib/l10n/intl_fa.arb

@@ -572,8 +572,8 @@
   "@pieceColor": {
     "description": "Piece color"
   },
-  "backgroudColor": "رنگ پس زمینه",
-  "@backgroudColor": {
+  "backgroundColor": "رنگ پس زمینه",
+  "@backgroundColor": {
     "description": "Background color"
   },
   "lineColor": "رنگ خط تخته",

src/ui/flutter_app/lib/l10n/intl_hu.arb

@@ -572,8 +572,8 @@
   "@pieceColor": {
     "description": "Piece color"
   },
-  "backgroudColor": "Háttérszín",
-  "@backgroudColor": {
+  "backgroundColor": "Háttérszín",
+  "@backgroundColor": {
     "description": "Background color"
   },
   "lineColor": "Tábla vonalszíne",

src/ui/flutter_app/lib/l10n/intl_zh.arb

@@ -143,7 +143,7 @@
   "color": "颜色",
   "boardColor": "棋盘颜色",
   "pieceColor": "棋子颜色",
-  "backgroudColor": "背景颜色",
+  "backgroundColor": "背景颜色",
   "lineColor": "线条颜色",
   "whitePieceColor": "先手方棋子颜色",
   "blackPieceColor": "后手方棋子颜色",
@@ -192,7 +192,7 @@
   "takingBack": "回退中",
   "waiting": "请稍等",
   "stepForward": "前进一步",
-  "takeBackAll": "回退到底", 
+  "takeBackAll": "回退到底",
   "stepForwardAll": "前进到底",
   "moveNow": "立即行棋",
   "done": "完成",

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

@@ -52,7 +52,7 @@ class _PersonalizationSettingsPageState
   showColorDialog(String colorString) async {
     Map<String, int> colorStrToVal = {
       S.of(context).boardColor: Config.boardBackgroundColor,
-      S.of(context).backgroudColor: Config.darkBackgroundColor,
+      S.of(context).backgroundColor: Config.darkBackgroundColor,
       S.of(context).lineColor: Config.boardLineColor,
       S.of(context).whitePieceColor: Config.whitePieceColor,
       S.of(context).blackPieceColor: Config.blackPieceColor,
@@ -88,7 +88,7 @@ class _PersonalizationSettingsPageState
 
             if (colorString == S.of(context).boardColor) {
               Config.boardBackgroundColor = pickerColor.value;
-            } else if (colorString == S.of(context).backgroudColor) {
+            } else if (colorString == S.of(context).backgroundColor) {
               Config.darkBackgroundColor = pickerColor.value;
             } else if (colorString == S.of(context).lineColor) {
               Config.boardLineColor = pickerColor.value;
@@ -415,9 +415,9 @@ class _PersonalizationSettingsPageState
           ListItemDivider(),
           SettingsListTile(
             context: context,
-            titleString: S.of(context).backgroudColor,
+            titleString: S.of(context).backgroundColor,
             trailingColor: Config.darkBackgroundColor,
-            onTap: () => showColorDialog(S.of(context).backgroudColor),
+            onTap: () => showColorDialog(S.of(context).backgroundColor),
           ),
           ListItemDivider(),
           SettingsListTile(