Improved batch input handling

app/MindWork AI Studio/Assistants/BatchProcessing/AssistantBatchProcessing.razor

@@ -1,6 +1,7 @@
 @attribute [Route(Routes.ASSISTANT_BATCH_PROCESSING)]
 @inherits AssistantBaseCore<AIStudio.Dialogs.Settings.SettingsDialogBatchProcessing>
 @using AIStudio.Settings.DataModel
+@using AIStudio.Tools.Rust
 
 <MudText Typo="Typo.h5" Class="mb-3">
     @T("Input")
@@ -12,6 +13,13 @@
 
 <MudTextSwitch Label="@T("Include subfolders?")" Disabled="@this.isProcessingBatch" Value="@this.includeSubdirectories" ValueChanged="@(v => this.includeSubdirectories = v)" LabelOn="@T("Yes, process files in subfolders as well")" LabelOff="@T("No, only process files in the selected folder")"/>
 
+@if (this.includeSubdirectories)
+{
+    <MudJustifiedText Typo="Typo.body2" Class="mb-3">
+        @T("A separate output folder is excluded from document discovery. This includes the default 'ai-results' folder, so results from an earlier run are not processed again. If the input folder itself is used for output, known batch result files are excluded instead.")
+    </MudJustifiedText>
+}
+
 <MudText Typo="Typo.h5" Class="mb-3 mt-6">
     @T("Instructions")
 </MudText>
@@ -27,11 +35,13 @@
 
 @if (this.promptSource is BatchProcessingPromptSource.FREE_PROMPT)
 {
+    <ReadFileContent Text="@T("Load prompt from file")" @bind-FileContent="@this.freePrompt" Disabled="@this.isProcessingBatch"/>
+
     <MudTextField T="string" @bind-Text="@this.freePrompt" Validation="@this.ValidateFreePrompt" Immediate="@true" Disabled="@this.isProcessingBatch" Label="@T("What should the AI do with each document?")" HelperText="@T("These instructions are applied to every single document of the batch run.")" Variant="Variant.Outlined" Margin="Margin.Normal" Lines="5" AutoGrow="@true" MaxLines="26" Class="mb-3" UserAttributes="@USER_INPUT_ATTRIBUTES"/>
 }
 else if (this.promptSource is BatchProcessingPromptSource.FILE_IMPORT)
 {
-    <ReadFileContent Text="@T("Select the file with your instructions")" @bind-FileContent="@this.ImportedPrompt" ShowAttachedDocumentState="@true" Disabled="@this.isProcessingBatch"/>
+    <ReadFileContent Text="@T("Select the file with your instructions")" @bind-FileContent="@this.ImportedPrompt" Filter="@([FileTypes.MARKDOWN])" ShowAttachedDocumentState="@true" Disabled="@this.isProcessingBatch"/>
 
     @if (!string.IsNullOrWhiteSpace(this.promptFilePath))
     {

app/MindWork AI Studio/Assistants/BatchProcessing/AssistantBatchProcessing.razor.Validation.cs

@@ -20,6 +20,25 @@ public partial class AssistantBatchProcessing
         if (string.IsNullOrWhiteSpace(patterns))
             return T("Please provide at least one file pattern, e.g., *.pdf. Separate multiple patterns with a semicolon.");
 
+        var individualPatterns = patterns.Split(';');
+        if (individualPatterns.Any(string.IsNullOrWhiteSpace))
+            return T("Please remove empty file patterns. Separate valid patterns with a single semicolon.");
+
+        foreach (var patternEntry in individualPatterns)
+        {
+            var pattern = patternEntry.Trim();
+            if (pattern is "." or ".."
+                || pattern.EndsWith("..", StringComparison.Ordinal)
+                || pattern.IndexOfAny([Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar, '/', '\\']) >= 0)
+                return T("Please use file name patterns without folder paths, e.g., *.pdf or report-*.docx.");
+
+            var invalidCharacters = Path.GetInvalidFileNameChars()
+                .Where(character => character is not '*' and not '?')
+                .ToArray();
+            if (pattern.IndexOfAny(invalidCharacters) >= 0)
+                return T("One of the file patterns contains an invalid character.");
+        }
+
         return null;
     }
 

app/MindWork AI Studio/Components/ReadFileContent.razor.cs

@@ -50,6 +50,13 @@ public partial class ReadFileContent : MSGComponentBase
     /// </summary>
     [Parameter]
     public bool CatchAllDocuments { get; set; }
+
+    /// <summary>
+    /// Optionally restricts the file types offered by the native file picker
+    /// and accepted by this component.
+    /// </summary>
+    [Parameter]
+    public FileTypeFilter[]? Filter { get; set; }
     
     [Inject]
     private RustService RustService { get; init; } = null!;
@@ -252,7 +259,7 @@ public partial class ReadFileContent : MSGComponentBase
         this.isFileDialogOpen = true;
         try
         {
-            var selectedFile = await this.RustService.SelectFile(T("Select file to read its content"));
+            var selectedFile = await this.RustService.SelectFile(T("Select file to read its content"), this.Filter);
             if (selectedFile.UserCancelled)
             {
                 this.Logger.LogInformation("User cancelled the file selection");
@@ -310,6 +317,13 @@ public partial class ReadFileContent : MSGComponentBase
             return false;
         }
 
+        if (this.Filter is { Length: > 0 } && !FileTypes.IsAllowedPath(filePath, this.Filter))
+        {
+            this.Logger.LogWarning("Selected file does not match the configured file type filter: '{FilePath}'", filePath);
+            await this.MessageBus.SendWarning(new(Icons.Material.Filled.Warning, this.T("Please select a file with a supported file type.")));
+            return false;
+        }
+
         if (FileTypes.IsAllowedPath(filePath, FileTypes.AUDIO) || FileTypes.IsAllowedPath(filePath, FileTypes.VIDEO))
             return await this.LoadMediaTranscriptAsync(filePath);
 

app/MindWork AI Studio/Dialogs/Settings/SettingsDialogBatchProcessing.razor

@@ -1,5 +1,6 @@
 @using AIStudio.Assistants.BatchProcessing
 @using AIStudio.Settings
+@using AIStudio.Tools.Rust
 @inherits SettingsDialogBase
 
 <MudDialog>
@@ -26,7 +27,7 @@
             }
             else if (this.SettingsManager.ConfigurationData.BatchProcessing.PromptSource is BatchProcessingPromptSource.FILE_IMPORT)
             {
-                <ConfigurationText OptionDescription="@T("Default Markdown instructions file")" Disabled="@this.DefaultsDisabled" Icon="@Icons.Material.Filled.Description" Text="@(() => this.SettingsManager.ConfigurationData.BatchProcessing.PromptFilePath)" TextUpdate="@(value => this.SettingsManager.ConfigurationData.BatchProcessing.PromptFilePath = value)" OptionHelp="@T("The current content of this Markdown file is loaded whenever the defaults are applied.")" IsLocked="() => ManagedConfiguration.TryGet(x => x.BatchProcessing, x => x.PromptFilePath, out var meta) && meta.IsLocked"/>
+                <ConfigurationFile OptionDescription="@T("Default Markdown instructions file")" Disabled="@this.DefaultsDisabled" Icon="@Icons.Material.Filled.Description" Text="@(() => this.SettingsManager.ConfigurationData.BatchProcessing.PromptFilePath)" TextUpdate="@(value => this.SettingsManager.ConfigurationData.BatchProcessing.PromptFilePath = value)" FileDialogTitle="@T("Select the default Markdown instructions file")" Filter="@([FileTypes.MARKDOWN])" OptionHelp="@T("The current content of this Markdown file is loaded whenever the defaults are applied.")" IsLocked="() => ManagedConfiguration.TryGet(x => x.BatchProcessing, x => x.PromptFilePath, out var meta) && meta.IsLocked"/>
             }
             else
             {
@@ -54,4 +55,4 @@
     <DialogActions>
         <MudButton OnClick="@this.Close" Variant="Variant.Filled">@T("Close")</MudButton>
     </DialogActions>
-</MudDialog>
+</MudDialog>

app/MindWork AI Studio/Tools/Rust/FileTypes.cs

@@ -50,6 +50,7 @@ public static class FileTypes
 
     // Document hierarchy
     public static readonly FileTypeFilter PDF         = FileTypeFilter.Leaf("PDF", "pdf");
+    public static readonly FileTypeFilter MARKDOWN    = FileTypeFilter.Leaf("Markdown", "md");
     public static readonly FileTypeFilter TEXT        = FileTypeFilter.Leaf(TB("Text"), "txt", "md", "rtf");
     public static readonly FileTypeFilter TABULAR     = FileTypeFilter.Leaf(TB("Tabular text"), "csv", "tsv");
     public static readonly FileTypeFilter MS_WORD     = FileTypeFilter.Leaf("Microsoft Word", "docx");