Improved how AI Studio saves its files (#1201)

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor

@@ -192,27 +192,9 @@
 
                             <MudPaper Outlined="true" Class="pa-4 mb-4">
                                 <MudText Typo="Typo.h5" Class="mb-3">@T("Briefing settings")</MudText>
-                                @*
-                                    The confidence belongs to the provider chosen right next to it, so both share one row.
-                                    It uses the icon trigger, like the chat does, so this row ends the same way the profile
-                                    row below it does: a field followed by one compact icon button.
-                                    Do not add a margin to that button to "correct" its height: a dense outlined select with
-                                    a label carries margin-top 8px and margin-bottom 4px of its own, so centring the boxes
-                                    already lands within a few pixels of the visible frame, and any added margin makes it
-                                    worse. Baseline alignment does not work here either, because the wrapper below takes
-                                    its baseline from its last line box, which sits under the input.
-                                *@
-                                <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="2" Wrap="Wrap.NoWrap">
-                                    @* ProviderSelection marks its select as flex-grow-0, and that utility is declared
-                                       !important, so StretchItems cannot widen it. The width has to come from here. *@
-                                    <div class="flex-grow-1">
-                                        <ProviderSelection @bind-ProviderSettings="@this.editor.Provider" ValidateProvider="@this.ValidateProvider" ExplicitMinimumConfidence="@this.MinimumProviderConfidence" Disabled="@this.IsCurrentBusy"/>
-                                    </div>
-                                    @if (this.SettingsManager.ConfigurationData.Confidence.ShowProviderConfidence)
-                                    {
-                                        <ConfidenceInfo LLMProvider="@this.editor.Provider.UsedLLMProvider"/>
-                                    }
-                                </MudStack>
+                                @* The provider row ends in a field followed by one compact icon button, the same way the
+                                   profile row below it does. *@
+                                <ProviderSelectionWithConfidence @bind-ProviderSettings="@this.editor.Provider" ValidateProvider="@this.ValidateProvider" ExplicitMinimumConfidence="@this.MinimumProviderConfidence" Disabled="@this.IsCurrentBusy"/>
 
                                 <ProfileFormSelection @bind-Profile="@this.editor.Profile" Disabled="@this.IsCurrentBusy"/>
                                 <EnumSelection T="CommonLanguages" NameFunc="@(language => language.Name)" @bind-Value="@this.editor.TargetLanguage" Icon="@AppIcons.LANGUAGE" Label="@T("Target language")" AllowOther="true" @bind-OtherInput="@this.editor.CustomTargetLanguage" OtherValue="CommonLanguages.OTHER" LabelOther="@T("Custom target language")" ValidateOther="@this.ValidateCustomTargetLanguage" SelectionUpdated="@(_ => this.ScheduleFormValidation())" Disabled="@this.IsCurrentBusy"/>

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingStore.Projects.cs

@@ -98,8 +98,7 @@ public sealed partial class VisualBriefingStore
                 return;
 
             Directory.CreateDirectory(this.RootDirectory);
-            foreach (var temporaryPath in Directory.EnumerateFiles(this.RootDirectory, "*.tmp-*", SearchOption.AllDirectories))
-                TryDeleteFile(temporaryPath);
+            AtomicFile.DeleteTemporaryFiles(this.RootDirectory, logger);
 
             await this.LoadSelectionAsync(token);
             foreach (var directory in Directory.EnumerateDirectories(this.RootDirectory))

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingStore.cs

@@ -111,26 +111,22 @@ public sealed partial class VisualBriefingStore(
     }
 
     /// <summary>
-    /// Defines <c>WriteTextAtomicAsync</c> for the visual briefing feature.
+    /// Writes a text file of a briefing so that readers see either the old or the new content, never a part of it.
     /// </summary>
-    private static async Task WriteTextAtomicAsync(string targetPath,
+    /// <remarks>
+    /// The content reaches the disk before it replaces the file, so that a power failure takes no briefing away.
+    /// </remarks>
+    /// <param name="targetPath">The file to write.</param>
+    /// <param name="content">The new content.</param>
+    /// <param name="overwrite">Whether an existing file is replaced; otherwise, an existing file fails the write with an IOException.</param>
+    /// <param name="token">The cancellation token.</param>
+    private static Task WriteTextAtomicAsync(string targetPath,
         string content,
         bool overwrite,
         CancellationToken token)
     {
         Directory.CreateDirectory(Path.GetDirectoryName(targetPath)!);
-        var temporaryPath = $"{targetPath}.tmp-{Guid.NewGuid():N}";
-        try
-        {
-            await File.WriteAllTextAsync(temporaryPath, content, new UTF8Encoding(false), token);
-            await using (var stream = new FileStream(temporaryPath, FileMode.Open, FileAccess.ReadWrite, FileShare.None, 4_096, true))
-                await stream.FlushAsync(token);
-            File.Move(temporaryPath, targetPath, overwrite);
-        }
-        finally
-        {
-            TryDeleteFile(temporaryPath);
-        }
+        return AtomicFile.WriteTextAsync(targetPath, content, new UTF8Encoding(false), token, overwrite, flushToDisk: true);
     }
 
     /// <summary>