feat(learning): harden access and practice sessions

Tiku.Application/Content/ContentNavigationQueryModels.cs

@@ -19,7 +19,9 @@ public sealed record ContentNavigationFilter(
     string? Keyword = null,
     bool IncludeHidden = false,
     bool IncludeInactive = false,
-    int? Limit = null);
+    int? Limit = null,
+    IReadOnlyCollection<Guid>? AllowedContentSliceIds = null,
+    IReadOnlyCollection<Guid>? AllowedRegionIds = null);
 
 public sealed record ContentEntryCatalogItem(
     Guid Id,
@@ -118,10 +120,5 @@ public sealed record CollectionQuestionCatalogItem(
     Guid? VersionId,
     string? Content,
     JsonElement Options,
-    int? CorrectOptionIndex,
-    JsonElement CorrectOptionIndices,
-    string? AnswerText,
-    string? Explanation,
-    JsonElement SubQuestions,
     string? CodeLang,
-    string? CodeTemplate);
+    string? CodeTemplate);