made getters non nullable and removed all null assertion operators

lib/presentation/widgets/player_selection.dart

@@ -97,7 +97,7 @@ class _PlayerSelectionState extends State<PlayerSelection> {
           CustomSearchBar(
             controller: _searchBarController,
             constraints: const BoxConstraints(maxHeight: 45, minHeight: 45),
-            hintText: AppLocalizations.of(context)!.search_for_players,
+            hintText: AppLocalizations.of(context).search_for_players,
             trailingButtonShown: true,
             trailingButtonicon: Icons.add_circle,
             trailingButtonEnabled: _searchBarController.text.trim().isNotEmpty,
@@ -141,7 +141,7 @@ class _PlayerSelectionState extends State<PlayerSelection> {
             child: selectedPlayers.isEmpty
                 ? Center(
                     child: Text(
-                      AppLocalizations.of(context)!.no_players_selected,
+                      AppLocalizations.of(context).no_players_selected,
                     ),
                   )
                 : SingleChildScrollView(
@@ -185,7 +185,7 @@ class _PlayerSelectionState extends State<PlayerSelection> {
           ),
           const SizedBox(height: 10),
           Text(
-            AppLocalizations.of(context)!.all_players,
+            AppLocalizations.of(context).all_players,
             style: const TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
           ),
           const SizedBox(height: 10),
@@ -199,11 +199,11 @@ class _PlayerSelectionState extends State<PlayerSelection> {
                 visible: suggestedPlayers.isNotEmpty,
                 replacement: TopCenteredMessage(
                   icon: Icons.info,
-                  title: AppLocalizations.of(context)!.info,
+                  title: AppLocalizations.of(context).info,
                   message: allPlayers.isEmpty
-                      ? AppLocalizations.of(context)!.no_players_created_yet
+                      ? AppLocalizations.of(context).no_players_created_yet
                       : (selectedPlayers.length == allPlayers.length)
-                      ? AppLocalizations.of(context)!.all_players_selected
+                      ? AppLocalizations.of(context).all_players_selected
                       : AppLocalizations.of(
                           context,
                         )!.no_players_found_with_that_name,
@@ -276,7 +276,7 @@ class _PlayerSelectionState extends State<PlayerSelection> {
           backgroundColor: CustomTheme.boxColor,
           content: Center(
             child: Text(
-              AppLocalizations.of(context)!.could_not_add_player(playerName),
+              AppLocalizations.of(context).could_not_add_player(playerName),
               style: const TextStyle(color: Colors.white),
             ),
           ),

lib/presentation/widgets/tiles/match_tile.dart

@@ -98,7 +98,7 @@ class _MatchTileState extends State<MatchTile> {
                     const SizedBox(width: 8),
                     Expanded(
                       child: Text(
-                        AppLocalizations.of(context)!.winner(winner.name),
+                        AppLocalizations.of(context).winner(winner.name),
                         style: const TextStyle(
                           fontSize: 14,
                           fontWeight: FontWeight.w600,
@@ -115,7 +115,7 @@ class _MatchTileState extends State<MatchTile> {
 
             if (allPlayers.isNotEmpty) ...[
               Text(
-                AppLocalizations.of(context)!.players,
+                AppLocalizations.of(context).players,
                 style: const TextStyle(
                   fontSize: 13,
                   color: Colors.grey,
@@ -150,7 +150,7 @@ class _MatchTileState extends State<MatchTile> {
         context,
       )!.yesterday_at(DateFormat('HH:mm').format(dateTime));
     } else if (difference.inDays < 7) {
-      return AppLocalizations.of(context)!.days_ago(difference.inDays);
+      return AppLocalizations.of(context).days_ago(difference.inDays);
     } else {
       return DateFormat('MMM d, yyyy').format(dateTime);
     }

lib/presentation/widgets/tiles/statistics_tile.dart

@@ -36,7 +36,7 @@ class StatisticsTile extends StatelessWidget {
           visible: values.isNotEmpty,
           replacement: Center(
             heightFactor: 4,
-            child: Text(AppLocalizations.of(context)!.no_data_available),
+            child: Text(AppLocalizations.of(context).no_data_available),
           ),
           child: Column(
             children: List.generate(min(values.length, itemCount), (index) {