Added a prompt injection detection (#857)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Chat/ContentText.cs

@@ -6,6 +6,7 @@ using AIStudio.Settings;
 using AIStudio.Tools.PluginSystem;
 using AIStudio.Tools.RAG.RAGProcesses;
 using AIStudio.Tools.Rust;
+using AIStudio.Tools.Security;
 
 namespace AIStudio.Chat;
 
@@ -300,6 +301,13 @@ public sealed class ContentText : IContent
                         LOGGER.LogWarning("File attachments which need Pandoc could not be processed because the Pandoc version check failed.");
                 }
 
+                //
+                // One report for the whole batch: attaching twenty documents must produce one
+                // dialog listing all of them, not twenty dialogs in a row.
+                //
+                var guardService = Program.SERVICE_PROVIDER.GetRequiredService<PromptInjectionGuardService>();
+                await using var promptInjectionScope = guardService.BeginAction();
+
                 //
                 // The document blocks are collected separately, so we only announce attached
                 // files when at least one of them could actually be read. Announcing files we