Code Review and bug fixes

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

@@ -267,7 +267,7 @@ public partial class ChatComponent : MSGComponentBase
             await this.SyncWorkspaceHeaderWithChatThreadAsync();
         
         // Select the correct provider:
-        await this.SelectProviderWhenLoadingChat();
+        await this.SelectProviderWhenLoadingChat(useChatProfileSelection: deferredRequest is not null);
         await this.SyncForegroundChatAsync();
         await this.ConsumeMediaOutcomeAsync();
         await base.OnInitializedAsync();
@@ -637,7 +637,9 @@ public partial class ChatComponent : MSGComponentBase
         }
         else
         {
-            this.currentProfileIds = this.SettingsManager.ResolveProfiles(this.ChatThread.SelectedProfileIds).Select(profile => profile.Id).ToHashSet(StringComparer.OrdinalIgnoreCase);
+            this.currentProfileIds = this.IsCurrentChatStreaming
+                ? this.SettingsManager.ResolveProfiles(this.ChatThread.SelectedProfileIds).Select(profile => profile.Id).ToHashSet(StringComparer.OrdinalIgnoreCase)
+                : this.SettingsManager.ResolveProfiles(this.currentProfileIds).Select(profile => profile.Id).ToHashSet(StringComparer.OrdinalIgnoreCase);
 
             this.currentChatTemplate = string.IsNullOrWhiteSpace(this.ChatThread.SelectedChatTemplate)
                 ? this.SettingsManager.GetChatTemplateById(this.currentChatTemplate.Id)
@@ -1024,6 +1026,7 @@ public partial class ChatComponent : MSGComponentBase
         this.hasUnsavedChanges = false;
         this.ComposerState.Clear();
         this.selectedToolIds = ToolSelectionRules.NormalizeSelection(this.SettingsManager.GetDefaultToolIds(Tools.Components.CHAT));
+        this.currentProfileIds = this.SettingsManager.GetPreselectedProfiles(Tools.Components.CHAT).Select(profile => profile.Id).ToHashSet(StringComparer.OrdinalIgnoreCase);
         this.RefreshCurrentProfileAndChatTemplate();
         
         //
@@ -1188,6 +1191,7 @@ public partial class ChatComponent : MSGComponentBase
         this.hasUnsavedChanges = false;
         this.ComposerState.Clear();
         this.ClearWorkspaceHeaderState();
+        this.currentProfileIds = this.SettingsManager.GetPreselectedProfiles(Tools.Components.CHAT).Select(profile => profile.Id).ToHashSet(StringComparer.OrdinalIgnoreCase);
         
         this.ChatThread = null;
         this.MarkCurrentChatAsLoadedParameter();
@@ -1196,7 +1200,7 @@ public partial class ChatComponent : MSGComponentBase
         await this.ChatThreadChanged.InvokeAsync(this.ChatThread);
     }
     
-    private async Task SelectProviderWhenLoadingChat()
+    private async Task SelectProviderWhenLoadingChat(bool useChatProfileSelection = false)
     {
         var chatProvider = this.ChatThread?.SelectedProvider;
         var chatProfileIds = this.ChatThread?.SelectedProfileIds;
@@ -1206,9 +1210,12 @@ public partial class ChatComponent : MSGComponentBase
         
         await this.ProviderChanged.InvokeAsync(this.Provider);
 
-        // Try to select the profile:
-        if (chatProfileIds is not null)
+        // A running chat or an explicitly configured chat launcher keeps its selection. Opening an
+        // inactive chat starts a new UI session and therefore reapplies the configured defaults.
+        if ((useChatProfileSelection || this.IsCurrentChatStreaming) && chatProfileIds is not null)
             this.currentProfileIds = this.SettingsManager.ResolveProfiles(chatProfileIds).Select(profile => profile.Id).ToHashSet(StringComparer.OrdinalIgnoreCase);
+        else
+            this.currentProfileIds = this.SettingsManager.GetPreselectedProfiles(Tools.Components.CHAT).Select(profile => profile.Id).ToHashSet(StringComparer.OrdinalIgnoreCase);
         
         // Try to select the chat template:
         if (!string.IsNullOrWhiteSpace(chatChatTemplate))

app/MindWork AI Studio/Components/DirectChatLauncherForm.razor

@@ -28,7 +28,7 @@
 </MudSelect>
 @if (this.SelectedProfileMode is ProfilePreselectionMode.USE_SPECIFIC_PROFILES)
 {
-    <MudSelect T="string" MultiSelection="true" SelectedValues="@(this.ProfileIds ?? [])" SelectedValuesChanged="@this.SetProfileIds" MultiSelectionTextFunc="@this.GetSelectedProfileText" Label="@T("Profiles")" Variant="Variant.Outlined" Margin="Margin.Dense" Class="mb-3 rounded-lg" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.Person">
+    <MudSelect T="string" MultiSelection="true" SelectedValues="@(this.ProfileIds ?? [])" SelectedValuesChanged="@this.SetProfileIds" MultiSelectionTextFunc="@this.GetSelectedProfileText" Validation="@this.ValidateProfileIds" Label="@T("Profiles")" Variant="Variant.Outlined" Margin="Margin.Dense" Class="mb-3 rounded-lg" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.Person">
         @foreach (var profile in this.SettingsManager.ConfigurationData.Profiles)
         {
             <MudSelectItem T="string" Value="@profile.Id">@profile.GetSafeName()</MudSelectItem>

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

@@ -133,9 +133,9 @@ public partial class DirectChatLauncherForm : MSGComponentBase
         this.profileModeOverride = mode;
         HashSet<string>? profileIds = mode switch
         {
-            ProfilePreselectionMode.USE_APP_DEFAULT => null,
-            ProfilePreselectionMode.USE_NO_PROFILES => [],
-            ProfilePreselectionMode.USE_SPECIFIC_PROFILES => this.ProfileIds is { Count: > 0 } ? [..this.ProfileIds] : [],
+            ProfilePreselectionMode.USE_APP_DEFAULT => ProfilePreselection.AppDefault,
+            ProfilePreselectionMode.USE_NO_PROFILES => ProfilePreselection.NoProfiles,
+            ProfilePreselectionMode.USE_SPECIFIC_PROFILES => this.ProfileIds is { Count: > 0 } ? ProfilePreselection.Specific(this.ProfileIds) : ProfilePreselection.NoProfiles,
             _ => null,
         };
 
@@ -152,6 +152,15 @@ public partial class DirectChatLauncherForm : MSGComponentBase
         await this.ProfileIdsChanged.InvokeAsync(selection);
     }
 
+    //
+    // "Use a custom profile selection" with nothing picked yet is indistinguishable from "use no
+    // profiles" once persisted, so it must not be a savable end state:
+    //
+    private string? ValidateProfileIds(IEnumerable<string?>? profileIds) =>
+        this.SelectedProfileMode == ProfilePreselectionMode.USE_SPECIFIC_PROFILES && !(profileIds?.Any(profileId => !string.IsNullOrWhiteSpace(profileId)) ?? false)
+            ? T("Select at least one profile, or choose a different option above.")
+            : null;
+
     private async Task SetChatTemplateId(string chatTemplateId)
     {
         this.ChatTemplateId = chatTemplateId;

app/MindWork AI Studio/Components/ProfilePreselectionConfiguration.razor

@@ -5,7 +5,7 @@
 
 @if (this.SelectedMode is ProfilePreselectionMode.USE_SPECIFIC_PROFILES)
 {
-    <ConfigurationMultiSelect TData="string" OptionDescription="@T("Profiles")" Disabled="@this.Disabled" IsLocked="@this.IsLocked" SelectedValues="@(() => this.SpecificProfileIds)" Data="@ConfigurationSelectDataFactory.GetProfilesData(this.SettingsManager.ConfigurationData.Profiles)" SelectionUpdateAsync="@this.ProfilesChanged" MultiSelectionTextFunc="@this.GetSelectionText">
+    <ConfigurationMultiSelect TData="string" OptionDescription="@T("Custom preselected profiles")" Disabled="@this.Disabled" IsLocked="@this.IsLocked" SelectedValues="@(() => this.SpecificProfileIds)" Data="@ConfigurationSelectDataFactory.GetProfilesData(this.SettingsManager.ConfigurationData.Profiles)" SelectionUpdateAsync="@this.ProfilesChanged" MultiSelectionTextFunc="@this.GetSelectionText">
         <ItemTemplate Context="profileData">
             <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="1">
                 <MudIcon Icon="@this.ProfileIcon(profileData.Value)" Size="Size.Small" Style="color: var(--mud-palette-action-default);" />

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

@@ -36,11 +36,24 @@ public partial class ProfilePreselectionConfiguration : MSGComponentBase
     private async Task ModeChanged(ProfilePreselectionMode mode)
     {
         this.selectedModeOverride = mode;
+
+        //
+        // Switching to "custom profile selection" with nothing picked yet has no value that could
+        // be persisted: it would serialize identically to "no profiles" and silently discard
+        // whatever was configured before. Only persist once the user actually picks a profile,
+        // through ProfilesChanged below; until then, only the visible mode changes.
+        //
+        if (mode == ProfilePreselectionMode.USE_SPECIFIC_PROFILES && this.SpecificProfileIds.Count == 0)
+        {
+            await this.InvokeAsync(this.StateHasChanged);
+            return;
+        }
+
         HashSet<string>? selection = mode switch
         {
-            ProfilePreselectionMode.USE_APP_DEFAULT => null,
-            ProfilePreselectionMode.USE_NO_PROFILES => [],
-            ProfilePreselectionMode.USE_SPECIFIC_PROFILES => this.SpecificProfileIds.Count > 0 ? [..this.SpecificProfileIds] : [],
+            ProfilePreselectionMode.USE_APP_DEFAULT => ProfilePreselection.AppDefault,
+            ProfilePreselectionMode.USE_NO_PROFILES => ProfilePreselection.NoProfiles,
+            ProfilePreselectionMode.USE_SPECIFIC_PROFILES => ProfilePreselection.Specific(this.SpecificProfileIds),
             _ => null,
         };