Add visual indicators and validation for Last Questions

Co-authored-by: dwarwick <15970276+dwarwick@users.noreply.github.com>

Author: Copilot

JwtIdentity.Client/Pages/Survey/BranchingSurveyEdit.razor

@@ -143,7 +143,13 @@ else
                                                 @foreach (var question in groupQuestions)
                                                 {
                                                     <MudListItem T="string">
-                                                        <MudText>Q@(question.QuestionNumber): @question.Text</MudText>
+                                                        <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="2">
+                                                            <MudText>Q@(question.QuestionNumber): @question.Text</MudText>
+                                                            @if (question.IsLastQuestion)
+                                                            {
+                                                                <MudChip Size="MudBlazor.Size.Small" Color="Color.Warning" Icon="@Icons.Material.Filled.Flag">Last</MudChip>
+                                                            }
+                                                        </MudStack>
                                                     </MudListItem>
                                                 }
                                             </MudList>
@@ -174,10 +180,15 @@ else
                             <MudListItem T="string" Class="@questionColorClass">
                                 <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="2">
                                     <span class="@($"group-badge group-badge-{question.GroupId % 10}")">Group @question.GroupId</span>
+                                    @if (question.IsLastQuestion)
+                                    {
+                                        <MudChip Size="MudBlazor.Size.Small" Color="Color.Warning" Icon="@Icons.Material.Filled.Flag">Last Question</MudChip>
+                                    }
                                     <MudText Style="flex: 1;">Q@(question.QuestionNumber): @question.Text</MudText>
                                     <MudSelect T="int" Label="Assign to Group" Value="question.GroupId"
                                                ValueChanged="@(async value => { await MoveQuestionToGroup(question, value); await RefreshDiagram(); })"
-                                               Variant="Variant.Outlined" Dense="true" Style="width: 250px;">
+                                               Variant="Variant.Outlined" Dense="true" Style="width: 250px;"
+                                               Disabled="@question.IsLastQuestion">
                                         @foreach (var g in QuestionGroups.OrderBy(x => x.GroupNumber))
                                         {
                                             <MudSelectItem Value="@g.GroupNumber">
@@ -199,6 +210,7 @@ else
                     @foreach (var group in QuestionGroups.OrderBy(g => g.GroupNumber))
                     {
                         var groupQuestions = Survey.Questions.Where(q => q.GroupId == group.GroupNumber &&
+                        !q.IsLastQuestion && // Exclude Last Questions from branching configuration
                         (q.QuestionType == QuestionType.MultipleChoice ||
                         q.QuestionType == QuestionType.SelectAllThatApply ||
                         q.QuestionType == QuestionType.TrueFalse)).OrderBy(q => q.QuestionNumber).ToList();

JwtIdentity.Client/Pages/Survey/EditSurvey.razor

@@ -101,6 +101,11 @@
                                             {
                                                 <MudText Color="Color.Error" Typo="Typo.caption" Class="RequiredStar">*</MudText>
                                             }
+                                            
+                                            @if (question.IsLastQuestion)
+                                            {
+                                                <MudChip Size="MudBlazor.Size.Small" Color="Color.Warning" Icon="@Icons.Material.Filled.Flag">Last</MudChip>
+                                            }
 
                                         </MudStack>
                                         <div style="height: 2px; background-color: blueviolet; width: 100%;"></div>

JwtIdentity.Client/Pages/Survey/EditSurvey.razor.cs

@@ -301,6 +301,38 @@ protected async Task AddQuestionToSurvey()
                 return;
             }
 
+            // Validation: Last Questions cannot have branching rules defined
+            if (IsLastQuestion && SelectedQuestion != null)
+            {
+                if (SelectedQuestion.QuestionType == QuestionType.MultipleChoice)
+                {
+                    var mcQuestion = SelectedQuestion as MultipleChoiceQuestionViewModel;
+                    if (mcQuestion?.Options?.Any(o => o.BranchToGroupId.HasValue) == true)
+                    {
+                        _ = Snackbar.Add("Cannot mark as Last Question: This question has branching rules defined. Remove branching rules first.", Severity.Warning);
+                        return;
+                    }
+                }
+                else if (SelectedQuestion.QuestionType == QuestionType.SelectAllThatApply)
+                {
+                    var saQuestion = SelectedQuestion as SelectAllThatApplyQuestionViewModel;
+                    if (saQuestion?.Options?.Any(o => o.BranchToGroupId.HasValue) == true)
+                    {
+                        _ = Snackbar.Add("Cannot mark as Last Question: This question has branching rules defined. Remove branching rules first.", Severity.Warning);
+                        return;
+                    }
+                }
+                else if (SelectedQuestion.QuestionType == QuestionType.TrueFalse)
+                {
+                    var tfQuestion = SelectedQuestion as TrueFalseQuestionViewModel;
+                    if (tfQuestion?.BranchToGroupIdOnTrue.HasValue == true || tfQuestion?.BranchToGroupIdOnFalse.HasValue == true)
+                    {
+                        _ = Snackbar.Add("Cannot mark as Last Question: This question has branching rules defined. Remove branching rules first.", Severity.Warning);
+                        return;
+                    }
+                }
+            }
+
             ResetQuestions = true;
 
             switch (SelectedQuestionType.Replace(" ", ""))