Fixed agents being left without a model when none was set aside for them (#985)

app/MindWork AI Studio/Components/ProviderSelection.razor

@@ -3,7 +3,7 @@
 @{
     var availableProviderItems = this.GetAvailableProviderSelectionItems().ToList();
 }
-<MudSelect T="Provider" Value="@this.ProviderSettings" ValueChanged="@this.SelectionChanged" Validation="@this.ValidateProvider" Margin="Margin.Dense" Label="@T("Provider")" Class="mb-3 rounded-lg" OuterClass="flex-grow-0" Variant="Variant.Outlined" Disabled="@this.Disabled">
+<MudSelect T="Provider" Value="@this.ProviderSettings" ValueChanged="@this.SelectionChanged" Validation="@this.ValidateProvider" Margin="Margin.Dense" Label="@(this.Label ?? T("Provider"))" Class="mb-3 rounded-lg" OuterClass="flex-grow-0" Variant="Variant.Outlined" Disabled="@this.Disabled">
     @foreach (var providerItem in availableProviderItems)
     {
         <MudSelectItem Value="@providerItem.Provider">

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

@@ -19,6 +19,17 @@ public partial class ProviderSelection : MSGComponentBase
     [Parameter]
     public Func<AIStudio.Settings.Provider, string?> ValidateProvider { get; set; } = _ => null;
 
+    /// <summary>
+    /// What this place calls the thing being picked, when "Provider" is not the word it uses.
+    /// </summary>
+    /// <remarks>
+    /// Some places have the user pick a provider in order to set it up, and there the word is right.
+    /// Others have them pick one to get a job done, and speak of the model throughout. A field
+    /// labelled "Provider" in the middle of such a text reads like a second, different choice.
+    /// </remarks>
+    [Parameter]
+    public string? Label { get; set; }
+
     /// <summary>
     /// Gets or sets whether provider selection is disabled.
     /// </summary>

app/MindWork AI Studio/Components/ReadWebContent.razor

@@ -3,7 +3,13 @@
     <MudTextSwitch Label="@T("Read content from web?")" Disabled="@this.AgentIsRunning" Value="@this.Preselect" ValueChanged="@this.ShowWebContentReaderChanged" LabelOn="@T("Show web content options")" LabelOff="@T("Hide web content options")" />
     @if (this.Preselect)
     {
-        <MudTextSwitch Label="@T("Cleanup content by using an LLM agent?")" Value="@this.PreselectContentCleanerAgent" ValueChanged="@this.UseContentCleanerAgentChanged" Validation="@this.ValidateProvider" Disabled="@this.AgentIsRunning" LabelOn="@T("The content is cleaned using an LLM agent: the main content is extracted, advertisements and other irrelevant things are attempted to be removed; relative links are attempted to be converted into absolute links so that they can be used.")" LabelOff="@T("No content cleaning")" />
+        <MudTextSwitch Label="@T("Cleanup content by using an LLM agent?")" Value="@this.PreselectContentCleanerAgent" ValueChanged="@this.UseContentCleanerAgentChanged" Disabled="@this.AgentIsRunning" LabelOn="@T("The content is cleaned using an LLM agent: the main content is extracted, advertisements and other irrelevant things are attempted to be removed; relative links are attempted to be converted into absolute links so that they can be used.")" LabelOff="@T("No content cleaning")" />
+        @if (this.ContentCleanerHint is { } contentCleanerHint)
+        {
+            <MudText Typo="Typo.body2" Color="Color.Error" Class="mb-3">
+                @contentCleanerHint
+            </MudText>
+        }
         <MudStack Row="@true" AlignItems="@AlignItems.Baseline" Class="mb-3">
             <MudTextField T="string" Label="@T("URL from which to load the content")" Value="@this.URL" ValueChanged="@this.URLValueChanged" Validation="@this.ValidateURL" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.Link" Placeholder="https://..." HelperText="@T("Loads the content from your URL. Does not work when the content is hidden behind a paywall.")" Variant="Variant.Outlined" Immediate="@true" Disabled="@this.AgentIsRunning"/>
             <MudButton Disabled="@(!this.IsReady || this.AgentIsRunning)" Variant="Variant.Filled" Size="Size.Large" Color="Color.Primary" StartIcon="@Icons.Material.Filled.Download" OnClick="@this.LoadFromWeb">

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

@@ -72,33 +72,66 @@ public partial class ReadWebContent : MSGComponentBase
 
     private readonly Process<ReadWebContentSteps> process = Process<ReadWebContentSteps>.INSTANCE;
     private ProcessStepValue processStep;
-    
-    private bool isProviderValid;
 
+    /// <summary>
+    /// The model the content cleaner runs with.
+    /// </summary>
+    /// <remarks>
+    /// This is a resolved value, not a chosen one: the reader has no model selection of its own,
+    /// it takes what the assistant around it uses, unless a dedicated one for the cleaner or an
+    /// app-wide default takes precedence. Because the assistant's model can change at any moment,
+    /// this is resolved again on every render instead of being remembered from the first one.
+    /// </remarks>
     private AIStudio.Settings.Provider providerSettings = AIStudio.Settings.Provider.NONE;
 
     #region Overrides of ComponentBase
 
     protected override async Task OnInitializedAsync()
     {
-        this.ProviderSettings = this.SettingsManager.GetPreselectedProvider(Tools.Components.AGENT_TEXT_CONTENT_CLEANER, this.ProviderSettings.Id, true);
-        this.providerSettings = this.ProviderSettings;
-        this.ValidateProvider(this.PreselectContentCleanerAgent);
-        
+        this.ApplyFilters([], [ Event.CONFIGURATION_CHANGED ]);
+        this.ResolveProvider();
+
         await base.OnInitializedAsync();
     }
 
     protected override async Task OnParametersSetAsync()
     {
-        if (!this.SettingsManager.ConfigurationData.TextContentCleaner.PreselectAgentOptions)
-            this.providerSettings = this.ProviderSettings;
-        
-        this.ValidateProvider(this.PreselectContentCleanerAgent);
+        this.ResolveProvider();
         await base.OnParametersSetAsync();
     }
 
     #endregion
 
+    #region Overrides of MSGComponentBase
+
+    protected override Task ProcessIncomingMessage<T>(ComponentBase? sendingComponent, Event triggeredEvent, T? data) where T : default
+    {
+        if (triggeredEvent is Event.CONFIGURATION_CHANGED)
+        {
+            //
+            // A dedicated model for the cleaner, or the app-wide default, may be set while this
+            // assistant is open. Nothing about that reaches us as a parameter, so without this the
+            // user would have to leave the assistant and come back for it to take effect.
+            //
+            this.ResolveProvider();
+            this.StateHasChanged();
+        }
+
+        return Task.CompletedTask;
+    }
+
+    #endregion
+
+    /// <summary>
+    /// Determines the model the content cleaner runs with.
+    /// </summary>
+    /// <remarks>
+    /// Called from both lifecycle methods, and with the same arguments: the assistant's model is a
+    /// parameter, and a parameter arrives whenever the parent renders. Resolving only once would
+    /// leave the cleaner with whatever was set the first time this component was built.
+    /// </remarks>
+    private void ResolveProvider() => this.providerSettings = this.SettingsManager.GetPreselectedProvider(Tools.Components.AGENT_TEXT_CONTENT_CLEANER, this.ProviderSettings.Id, true);
+
     private async Task LoadFromWeb()
     {
         if(!this.IsReady)
@@ -128,6 +161,16 @@ public partial class ReadWebContent : MSGComponentBase
             markdown = retrievedPage.ExtractedPage.Markdown;
             markdown = await this.PromptInjectionGuardService.SanitizeAsync(markdown, PromptInjectionSource.WebContent(this.URL));
             
+            if (this.PreselectContentCleanerAgent && this.providerSettings == AIStudio.Settings.Provider.NONE)
+            {
+                //
+                // Say that the cleaning did not happen. The user asked for it, the page arrives,
+                // and without a word they would take the raw markdown -- navigation, cookie banner
+                // and advertising included -- for the cleaned result.
+                //
+                await this.MessageBus.SendError(new(Icons.Material.Filled.SettingsSuggest, T("The content was loaded, but not cleaned: no model is available for the content cleaner.")));
+            }
+
             if (this.PreselectContentCleanerAgent && this.providerSettings != AIStudio.Settings.Provider.NONE)
             {
                 this.AgentTextContentCleaner.ProviderSettings = this.providerSettings;
@@ -183,19 +226,16 @@ public partial class ReadWebContent : MSGComponentBase
         await this.ContentChanged.InvokeAsync(this.Content);
     }
 
-    private bool IsReady
-    {
-        get
-        {
-            if(!this.UrlIsValid)
-                return false;
-
-            if(this.PreselectContentCleanerAgent && !this.isProviderValid)
-                return false;
-
-            return true;
-        }
-    }
+    /// <summary>
+    /// Whether the content can be fetched.
+    /// </summary>
+    /// <remarks>
+    /// A missing model for the content cleaner is deliberately not part of this. Cleaning is an
+    /// option of the fetch, not a condition for it: making it one would leave the user with a
+    /// switch they turned on, no way to get their page, and a dead button to explain it. The page
+    /// is fetched, and LoadFromWeb says that it arrived uncleaned.
+    /// </remarks>
+    private bool IsReady => this.UrlIsValid;
 
     /// <summary>
     /// Whether the current URL can be loaded.
@@ -222,18 +262,30 @@ public partial class ReadWebContent : MSGComponentBase
         await this.PreselectContentCleanerAgentChanged.InvokeAsync(state);
     }
     
-    private string? ValidateProvider(bool shouldUseAgent)
+    /// <summary>
+    /// Says why the content cleaner has no model, or nothing when it has one.
+    /// </summary>
+    /// <remarks>
+    /// This is a hint, not a validation: the cleaner is an option of the reader, and an option
+    /// nobody can use yet must not keep the assistant around it from running. It is also stated
+    /// rather than remembered, so that choosing a model below makes it disappear at once.
+    /// The two causes lead to different places, which is why they are told apart: either no model
+    /// was chosen at all, or the chosen one is not trusted enough for this agent.
+    /// </remarks>
+    private string? ContentCleanerHint
     {
-        if(shouldUseAgent && this.providerSettings == AIStudio.Settings.Provider.NONE)
+        get
         {
-            this.isProviderValid = false;
-            return T("Please select a provider to use the cleanup agent.");
-        }
+            if(!this.PreselectContentCleanerAgent || this.providerSettings != AIStudio.Settings.Provider.NONE)
+                return null;
 
-        this.isProviderValid = true;
-        return null;
+            if(this.ProviderSettings == AIStudio.Settings.Provider.NONE)
+                return T("The content cleaner uses the model of this assistant. Please select one below.");
+
+            return T("The selected model does not meet the confidence requirements of the content cleaner. Please select another model, or configure an eligible one in the app settings.");
+        }
     }
-    
+
     private string? ValidateURL(string url)
     {
         if(string.IsNullOrWhiteSpace(url))