Address compiler warnings

WebApp/Components/Features/Teams/Assignment.razor

@@ -309,19 +309,19 @@
     private readonly AssignmentParameters _parameters = new() { RequireOnSite = false, RequireRegional = false };
     private ValidationService _validationService = new ValidationService(ValidationConfiguration.Default);
 
-    private List<EventDefinition>? _events;
-    private List<Student>? _students;
+    private List<EventDefinition> _events = null!;
+    private List<Student> _students = null!;
     private List<EventAssignmentThresholds> _eventAssignmentThresholds = [];
 
-    MudTable<Team> _teamData;
+    MudTable<Team> _teamData = null!;
     private Team[] _teams = [];
-    MudTable<StudentEventStatistics> _statisticData;
+    MudTable<StudentEventStatistics> _statisticData = null!;
     private List<StudentEventStatistics> _statistics = [];
-    MudTable<AssignmentRequirement> _assignmentRequirementData;
+    MudTable<AssignmentRequirement> _assignmentRequirementData = null!;
     private List<AssignmentRequirement> _assignmentRequirements = [];
-    MudTable<EventDefinition> _eventTwoTeamData;
+    MudTable<EventDefinition> _eventTwoTeamData = null!;
     private List<EventDefinition> _eventTwoTeams = [];
-    MudTable<EventDefinition> _eventOmittedData;
+    MudTable<EventDefinition> _eventOmittedData = null!;
     private List<EventDefinition> _eventOmitted = [];
 
     private string _solutionStatus = string.Empty;
@@ -387,9 +387,9 @@
         return new TableData<Team> { Items = _teams };
     }
 
-    private async Task<TableData<StudentEventStatistics>> ReloadStatistics(TableState arg1, CancellationToken arg2)
+    private Task<TableData<StudentEventStatistics>> ReloadStatistics(TableState arg1, CancellationToken arg2)
     {
-        return new TableData<StudentEventStatistics> {Items = _statistics};
+        return Task.FromResult(new TableData<StudentEventStatistics> {Items = _statistics});
     }
 
     private void UpdateValidationConfig()
@@ -403,20 +403,20 @@
         return _validationService.ValidateStudentStatistics(stats, ValidationContext.StudentAssignment);
     }
 
-    private async Task<TableData<AssignmentRequirement>> ReloadAssignmentRequirements(TableState arg1, CancellationToken arg2)
+    private Task<TableData<AssignmentRequirement>> ReloadAssignmentRequirements(TableState arg1, CancellationToken arg2)
     {
-        return new TableData<AssignmentRequirement> { Items = _assignmentRequirements };
+        return Task.FromResult(new TableData<AssignmentRequirement> { Items = _assignmentRequirements });
     }
 
-    private async Task<TableData<EventDefinition>> ReloadEventTwoTeam(TableState arg1, CancellationToken arg2)
+    private Task<TableData<EventDefinition>> ReloadEventTwoTeam(TableState arg1, CancellationToken arg2)
     {
-        return new TableData<EventDefinition> { Items = _eventTwoTeams };
+        return Task.FromResult(new TableData<EventDefinition> { Items = _eventTwoTeams });
     }
 
 
-    private async Task<TableData<EventDefinition>> ReloadOmittedEvents(TableState arg1, CancellationToken arg2)
+    private Task<TableData<EventDefinition>> ReloadOmittedEvents(TableState arg1, CancellationToken arg2)
     {
-        return new TableData<EventDefinition> { Items = _eventOmitted };
+        return Task.FromResult(new TableData<EventDefinition> { Items = _eventOmitted });
     }
 
     private void RequireEvent(EventDefinition evt, Student student, Requirement requirement)

WebApp/Components/Features/Teams/Components/TeamSelector.razor

@@ -12,7 +12,7 @@
 </MudSelect>
 
 @code {
-    [Parameter] public Team[]? Teams { get; set; }
+    [Parameter] public Team[] Teams { get; set; } = null!;
     [Parameter] public required IEnumerable<Team> SelectedTeams { get; set; }
     [Parameter] public string Label { get; set; } = "Teams";
 }

WebApp/Components/Features/Teams/Components/TeamStudents.razor

@@ -23,5 +23,5 @@
 
 @code {
     [Parameter]
-    public Team Team { get; set; }
+    public required Team Team { get; set; }
 }

WebApp/Components/Features/Teams/Index.razor

@@ -25,15 +25,13 @@
                         @context.Item.ToString()
                     </MudLink>
                     <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="1">
-                        <MudIconButton Icon="@Icons.Material.Filled.Edit"
-                                       Size="Size.Small"
-                                       Href="@($"/teams/edit?id={context.Item.Id}")"
-                                       Title="Edit" />
-                        <MudIconButton Icon="@Icons.Material.Outlined.Delete"
-                                       Size="Size.Small"
-                                       Color="Color.Error"
-                                       OnClick="() => DeleteTeam(context.Item!)"
-                                       Title="Delete" />
+                        <IconButtonWithTooltip Icon="@Icons.Material.Filled.Edit"
+                                               TooltipText="Edit"
+                                               Href="@($"/teams/edit?id={context.Item.Id}")" />
+                        <IconButtonWithTooltip Icon="@Icons.Material.Outlined.Delete"
+                                               TooltipText="Delete"
+                                               Color="Color.Error"
+                                               OnClick="() => DeleteTeam(context.Item!)" />
                     </MudStack>
                 </MudStack>
             </CellTemplate>

WebApp/Components/Features/Teams/Printout.razor

@@ -205,7 +205,7 @@ else
     private Team[]? _teams;
     private int _maxTeamSize;
     private Student[]? _students;
-    private bool _rankColorEnabled;
+    private bool _rankColorEnabled = false;
 
     private string EventRankClass(int rank)
     {