abstract: enable nullable annotations in legacy files

src/PostIt/PostIt/Controls/StatusBar.axaml

@@ -0,0 +1,22 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:PostIt.ViewModels"
+             x:Class="PostIt.Controls.StatusBar"
+             x:DataType="vm:StatusNotice">
+    <Border Background="{Binding Background}"
+            BorderBrush="{Binding BorderBrush}"
+            BorderThickness="1"
+            CornerRadius="6"
+            Padding="8">
+        <StackPanel Orientation="Horizontal" Spacing="8">
+            <TextBlock Text="{Binding Glyph}"
+                       FontWeight="Bold"
+                       Foreground="{Binding Foreground}"
+                       VerticalAlignment="Top"/>
+            <TextBlock Text="{Binding Message}"
+                       Foreground="{Binding Foreground}"
+                       TextWrapping="Wrap"
+                       VerticalAlignment="Center"/>
+        </StackPanel>
+    </Border>
+</UserControl>

src/PostIt/PostIt/Controls/StatusBar.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace PostIt.Controls;
+
+public partial class StatusBar : UserControl
+{
+    public StatusBar()
+    {
+        InitializeComponent();
+    }
+}

src/PostIt/PostIt/ViewModels/ActionStatusViewModelExtensions.cs

@@ -0,0 +1,32 @@
+namespace PostIt.ViewModels;
+
+public interface IActionStatusViewModel
+{
+    string StatusMessage { get; set; }
+    StatusNotice ActionStatus { get; set; }
+}
+
+public static class ActionStatusViewModelExtensions
+{
+    public static void SetInfoStatus(this IActionStatusViewModel viewModel, string message)
+        => viewModel.SetStatus(message, StatusSeverity.Info);
+
+    public static void SetWarningStatus(this IActionStatusViewModel viewModel, string message)
+        => viewModel.SetStatus(message, StatusSeverity.Warning);
+
+    public static void SetErrorStatus(this IActionStatusViewModel viewModel, string message)
+        => viewModel.SetStatus(message, StatusSeverity.Error);
+
+    public static void SetStatus(this IActionStatusViewModel viewModel, string message, StatusSeverity severity)
+    {
+        var normalizedMessage = string.IsNullOrWhiteSpace(message) ? "Pret." : message.Trim();
+
+        viewModel.StatusMessage = normalizedMessage;
+        viewModel.ActionStatus = severity switch
+        {
+            StatusSeverity.Error => StatusNotice.Error(normalizedMessage),
+            StatusSeverity.Warning => StatusNotice.Warning(normalizedMessage),
+            _ => StatusNotice.Info(normalizedMessage),
+        };
+    }
+}

src/PostIt/PostIt/ViewModels/ActivitiesPageViewModel.cs

@@ -13,7 +13,7 @@ using Yavsc.Api.Client;
 
 namespace PostIt.ViewModels;
 
-public partial class ActivitiesPageViewModel : ViewModelBase
+public partial class ActivitiesPageViewModel : ViewModelBase, IActionStatusViewModel
 {
     private readonly ActivityApiClient _client;
     private readonly BillingApiClient _billingClient;
@@ -43,6 +43,9 @@ public partial class ActivitiesPageViewModel : ViewModelBase
     [ObservableProperty]
     public partial string StatusMessage { get; set; } = "Choisissez une activité.";
 
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Choisissez une activité.");
+
     public ActivityInfo? CurrentActivity => SelectedSpecialization ?? SelectedActivity;
     public string SelectedActivityLabel => SelectedActivity?.Name ?? "(aucune activité)";
     public string CurrentActivityLabel => CurrentActivity?.Name ?? "(aucune)";
@@ -86,11 +89,11 @@ public partial class ActivitiesPageViewModel : ViewModelBase
         }
         catch (HttpRequestException ex) when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
         {
-            StatusMessage = "Accès refusé pour les activités (scope 'api'). Déconnectez puis reconnectez-vous.";
+            this.SetWarningStatus("Accès refusé pour les activités (scope 'api'). Déconnectez puis reconnectez-vous.");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
     }
 
@@ -102,11 +105,11 @@ public partial class ActivitiesPageViewModel : ViewModelBase
         }
         catch (HttpRequestException ex) when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
         {
-            StatusMessage = "Accès refusé pour les activités (scope 'api'). Déconnectez puis reconnectez-vous.";
+            this.SetWarningStatus("Accès refusé pour les activités (scope 'api'). Déconnectez puis reconnectez-vous.");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
     }
 
@@ -123,7 +126,7 @@ public partial class ActivitiesPageViewModel : ViewModelBase
             await ShowActivityAsync(first);
             if (first is null)
             {
-                StatusMessage = "Aucune activité disponible.";
+                this.SetInfoStatus("Aucune activité disponible.");
             }
         }
         catch (HttpRequestException ex) when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
@@ -131,14 +134,14 @@ public partial class ActivitiesPageViewModel : ViewModelBase
             Activities = new ObservableCollection<ActivityInfo>();
             Specializations = new ObservableCollection<ActivityInfo>();
             Performers = new ObservableCollection<ActivityUserDisplayItem>();
-            StatusMessage = "Accès refusé pour les activités (scope 'api'). Déconnectez puis reconnectez-vous.";
+            this.SetWarningStatus("Accès refusé pour les activités (scope 'api'). Déconnectez puis reconnectez-vous.");
         }
         catch (Exception ex)
         {
             Activities = new ObservableCollection<ActivityInfo>();
             Specializations = new ObservableCollection<ActivityInfo>();
             Performers = new ObservableCollection<ActivityUserDisplayItem>();
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {
@@ -230,19 +233,19 @@ public partial class ActivitiesPageViewModel : ViewModelBase
 
             Performers = new ObservableCollection<ActivityUserDisplayItem>(items);
             SelectedPerformer = null;
-            StatusMessage = $"{activity.Name} · {Performers.Count} utilisateur(s)";
+            this.SetInfoStatus($"{activity.Name} · {Performers.Count} utilisateur(s)");
         }
         catch (HttpRequestException ex) when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
         {
             Performers = new ObservableCollection<ActivityUserDisplayItem>();
             SelectedPerformer = null;
-            StatusMessage = "Accès refusé pour les activités (scope 'api'). Déconnectez puis reconnectez-vous.";
+            this.SetWarningStatus("Accès refusé pour les activités (scope 'api'). Déconnectez puis reconnectez-vous.");
         }
         catch (Exception ex)
         {
             Performers = new ObservableCollection<ActivityUserDisplayItem>();
             SelectedPerformer = null;
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {
@@ -259,7 +262,7 @@ public partial class ActivitiesPageViewModel : ViewModelBase
     {
         if (SelectedPerformer is null || CurrentActivity is null)
         {
-            StatusMessage = "Sélectionnez un utilisateur et une activité avec formulaire.";
+            this.SetWarningStatus("Sélectionnez un utilisateur et une activité avec formulaire.");
             return;
         }
 

src/PostIt/PostIt/ViewModels/AddCircleMemberDialogViewModel.cs

@@ -29,7 +29,7 @@ namespace PostIt.ViewModels;
 /// <c>CirclesPage</c> then calls
 /// <see cref="CircleApiClient.AddMemberAsync"/>.</para>
 /// </summary>
-public partial class AddCircleMemberDialogViewModel : ViewModelBase
+public partial class AddCircleMemberDialogViewModel : ViewModelBase, IActionStatusViewModel
 {
     private readonly IUserDirectory _directory;
 
@@ -46,7 +46,10 @@ public partial class AddCircleMemberDialogViewModel : ViewModelBase
     public partial bool IsBusy { get; set; }
 
     [ObservableProperty]
-    public partial string StatusMessage { get; set; } = string.Empty;
+    public partial string StatusMessage { get; set; } = "Pret.";
+
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Pret.");
 
     /// <summary>
     /// Raised when the user confirms a selection. The hosting
@@ -79,7 +82,7 @@ public partial class AddCircleMemberDialogViewModel : ViewModelBase
         if (string.IsNullOrWhiteSpace(SearchQuery))
         {
             Results.Clear();
-            StatusMessage = "Tapez un nom ou un email";
+            this.SetWarningStatus("Tapez un nom ou un email");
             return;
         }
 
@@ -88,11 +91,11 @@ public partial class AddCircleMemberDialogViewModel : ViewModelBase
         {
             var hits = await _directory.SearchAsync(SearchQuery, CancellationToken.None).ConfigureAwait(true);
             Results = new ObservableCollection<UserSummary>(hits ?? Array.Empty<UserSummary>());
-            StatusMessage = $"{Results.Count} résultat(s)";
+            this.SetInfoStatus($"{Results.Count} résultat(s)");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {
@@ -110,18 +113,20 @@ public partial class AddCircleMemberDialogViewModel : ViewModelBase
     {
         if (Selected is null)
         {
-            StatusMessage = "Sélectionnez un utilisateur";
+            this.SetWarningStatus("Sélectionnez un utilisateur");
             return;
         }
         Confirmed?.Invoke(this, Selected);
-        var app = App.Current as App;
+        var app = App.Current as App
+            ?? throw new InvalidOperationException("Application PostIt indisponible.");
         await app.GoBackAsync();
     }
 
     [RelayCommand]
     public async Task CloseAsync()
     {
-        var app = App.Current as App;
+        var app = App.Current as App
+            ?? throw new InvalidOperationException("Application PostIt indisponible.");
         await app.GoBackAsync();
     }
 }

src/PostIt/PostIt/ViewModels/BillingQueriesPageViewModel.cs

@@ -14,7 +14,7 @@ using Yavsc.Abstract.Workflow;
 
 namespace PostIt.ViewModels;
 
-public partial class BillingQueriesPageViewModel : ViewModelBase
+public partial class BillingQueriesPageViewModel : ViewModelBase, IActionStatusViewModel
 {
     private readonly BillingApiClient _billingClient;
 
@@ -36,6 +36,9 @@ public partial class BillingQueriesPageViewModel : ViewModelBase
     [ObservableProperty]
     public partial string StatusMessage { get; set; } = "Chargement des commandes...";
 
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Chargement des commandes...");
+
     public string Title => IsReadOnly
         ? $"Demandes en cours ({Form.Title})"
         : $"Commandes {Form.Title}";
@@ -90,17 +93,17 @@ public partial class BillingQueriesPageViewModel : ViewModelBase
                 .ToList();
 
             Queries = new ObservableCollection<BillingQueryDisplayItem>(filtered);
-            StatusMessage = BuildLoadedStatusMessage(filtered.Count);
+            this.SetInfoStatus(BuildLoadedStatusMessage(filtered.Count));
         }
         catch (HttpRequestException ex) when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
         {
             Queries = new ObservableCollection<BillingQueryDisplayItem>();
-            StatusMessage = "Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.";
+            this.SetWarningStatus("Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.");
         }
         catch (Exception ex)
         {
             Queries = new ObservableCollection<BillingQueryDisplayItem>();
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {
@@ -113,13 +116,13 @@ public partial class BillingQueriesPageViewModel : ViewModelBase
     {
         if (IsReadOnly)
         {
-            StatusMessage = "Mode lecture seule: l'ouverture en modification est désactivée.";
+            this.SetWarningStatus("Mode lecture seule: l'ouverture en modification est désactivée.");
             return;
         }
 
         if (SelectedQuery is null)
         {
-            StatusMessage = "Sélectionnez une commande.";
+            this.SetWarningStatus("Sélectionnez une commande.");
             return;
         }
 
@@ -139,11 +142,11 @@ public partial class BillingQueriesPageViewModel : ViewModelBase
         }
         catch (HttpRequestException ex) when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
         {
-            StatusMessage = "Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.";
+            this.SetWarningStatus("Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur lors de l'ouverture: {ex.Message}";
+            this.SetErrorStatus($"Erreur lors de l'ouverture: {ex.Message}");
         }
         finally
         {

src/PostIt/PostIt/ViewModels/CirclesPageViewModel.cs

@@ -34,7 +34,7 @@ namespace PostIt.ViewModels;
 /// <see cref="OnAddMemberConfirmedAsync"/>. The "remove"
 /// command is per-row and runs inline.</para>
 /// </summary>
-public partial class CirclesPageViewModel : ViewModelBase
+public partial class CirclesPageViewModel : ViewModelBase, IActionStatusViewModel
 {
     private readonly CircleApiClient _client;
 
@@ -63,8 +63,10 @@ public partial class CirclesPageViewModel : ViewModelBase
     public partial bool IsBusy { get; set; }
 
     [ObservableProperty]
-    public partial string StatusMessage { get; set; } = string.Empty;
+    public partial string StatusMessage { get; set; } = "Pret.";
 
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Pret.");
 
     public CirclesPageViewModel(CircleApiClient client)
     {
@@ -100,11 +102,11 @@ public partial class CirclesPageViewModel : ViewModelBase
         {
             var list = await _client.GetMyCirclesAsync();
             Circles = new ObservableCollection<CircleDto>(list ?? new());
-            StatusMessage = $"{Circles.Count} cercle(s)";
+            this.SetInfoStatus($"{Circles.Count} cercle(s)");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {
@@ -115,8 +117,10 @@ public partial class CirclesPageViewModel : ViewModelBase
     [RelayCommand]
     internal async Task OpenAddMemberAsync()
     {
-        var app = Application.Current as App;
+        var app = Application.Current as App
-        var services = app?.ServiceProvider;
+            ?? throw new InvalidOperationException("Application PostIt indisponible.");
+        var services = app.ServiceProvider
+            ?? throw new InvalidOperationException("ServiceProvider PostIt indisponible.");
         var directory = services.GetRequiredService<IUserDirectory>();
         AddCircleMemberDialogViewModel model =
         new AddCircleMemberDialogViewModel(directory);
@@ -147,11 +151,11 @@ public partial class CirclesPageViewModel : ViewModelBase
         {
             var list = await _client.GetMembersAsync(circleId);
             Members = new ObservableCollection<CircleMemberDto>(list ?? new());
-            StatusMessage = $"{Members.Count} membre(s)";
+            this.SetInfoStatus($"{Members.Count} membre(s)");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
             Members = new ObservableCollection<CircleMemberDto>();
         }
         finally
@@ -166,7 +170,7 @@ public partial class CirclesPageViewModel : ViewModelBase
         SelectedCircle = null;
         DraftName = string.Empty;
         DraftPublic = false;
-        StatusMessage = "Nouveau cercle";
+        this.SetInfoStatus("Nouveau cercle");
     }
 
     [RelayCommand]
@@ -176,7 +180,7 @@ public partial class CirclesPageViewModel : ViewModelBase
         SelectedCircle = circle;
         DraftName = circle.Name;
         DraftPublic = circle.Public;
-        StatusMessage = $"Édition de « {circle.Name} »";
+        this.SetInfoStatus($"Édition de « {circle.Name} »");
     }
 
     [RelayCommand]
@@ -184,7 +188,7 @@ public partial class CirclesPageViewModel : ViewModelBase
     {
         if (string.IsNullOrWhiteSpace(DraftName))
         {
-            StatusMessage = "Le nom est obligatoire";
+            this.SetWarningStatus("Le nom est obligatoire");
             return;
         }
 
@@ -198,22 +202,22 @@ public partial class CirclesPageViewModel : ViewModelBase
                     Name = DraftName.Trim(),
                     Public = DraftPublic,
                 });
-                StatusMessage = created is null
+                this.SetStatus(
-                    ? "Création échouée"
+                    created is null ? "Création échouée" : $"Cercle « {created.Name} » créé",
-                    : $"Cercle « {created.Name} » créé";
+                    created is null ? StatusSeverity.Warning : StatusSeverity.Info);
             }
             else
             {
                 SelectedCircle.Name = DraftName.Trim();
                 SelectedCircle.Public = DraftPublic;
                 await _client.UpdateCircleAsync(SelectedCircle.Id, SelectedCircle);
-                StatusMessage = $"Cercle « {SelectedCircle.Name} » mis à jour";
+                this.SetInfoStatus($"Cercle « {SelectedCircle.Name} » mis à jour");
             }
             await RefreshAsync();
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {
@@ -229,7 +233,7 @@ public partial class CirclesPageViewModel : ViewModelBase
         try
         {
             await _client.DeleteCircleAsync(circle.Id);
-            StatusMessage = $"Cercle « {circle.Name} » supprimé";
+            this.SetInfoStatus($"Cercle « {circle.Name} » supprimé");
             // If the deleted circle was the selected one,
             // clear the selection so the Members view goes
             // empty too (the partial setter on
@@ -240,7 +244,7 @@ public partial class CirclesPageViewModel : ViewModelBase
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {
@@ -261,7 +265,7 @@ public partial class CirclesPageViewModel : ViewModelBase
         try
         {
             await _client.AddMemberAsync(SelectedCircle.Id, picked.Id);
-            StatusMessage = $"« {picked.DisplayName} » ajouté au cercle";
+            this.SetInfoStatus($"« {picked.DisplayName} » ajouté au cercle");
             await LoadMembersAsync(SelectedCircle.Id);
         }
         catch (Exception ex)
@@ -276,7 +280,7 @@ public partial class CirclesPageViewModel : ViewModelBase
             var msg = ex.Message.Contains("409") || ex.Message.Contains("Conflict")
                 ? "Déjà membre du cercle"
                 : $"Erreur: {ex.Message}";
-            StatusMessage = msg;
+            this.SetStatus(msg, msg == "Déjà membre du cercle" ? StatusSeverity.Warning : StatusSeverity.Error);
         }
         finally
         {
@@ -297,11 +301,11 @@ public partial class CirclesPageViewModel : ViewModelBase
         {
             await _client.RemoveMemberAsync(SelectedCircle.Id, member.Id);
             Members.Remove(member);
-            StatusMessage = $"« {member.UserName} » retiré du cercle";
+            this.SetInfoStatus($"« {member.UserName} » retiré du cercle");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {

src/PostIt/PostIt/ViewModels/CommandFormsPageViewModel.cs

@@ -11,7 +11,7 @@ using Yavsc.Api.Client;
 
 namespace PostIt.ViewModels;
 
-public partial class CommandFormsPageViewModel : ViewModelBase
+public partial class CommandFormsPageViewModel : ViewModelBase, IActionStatusViewModel
 {
     private readonly BillingApiClient _billingClient;
 
@@ -25,7 +25,10 @@ public partial class CommandFormsPageViewModel : ViewModelBase
     public partial CommandFormSummary? SelectedForm { get; set; }
 
     [ObservableProperty]
-    public partial string StatusMessage { get; set; }
+    public partial string StatusMessage { get; set; } = "Pret.";
+
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Pret.");
 
     public string Title => $"Formulaires pour {Performer.UserName}";
     public string ContextLabel => $"{Activity.Name} · {Forms.Count} formulaire(s)";
@@ -55,9 +58,11 @@ public partial class CommandFormsPageViewModel : ViewModelBase
             .OrderBy(f => f.Title)
             .ThenBy(f => f.ActionName));
         SelectedForm = Forms.FirstOrDefault();
-        StatusMessage = Forms.Count == 0
+        this.SetStatus(
+            Forms.Count == 0
                 ? "Aucun formulaire n'est disponible pour cette activité."
-            : "Choisissez le formulaire à utiliser.";
+                : "Choisissez le formulaire à utiliser.",
+            Forms.Count == 0 ? StatusSeverity.Warning : StatusSeverity.Info);
     }
 
     private bool CanOpenSelectedForm() => SelectedForm is not null;
@@ -71,7 +76,7 @@ public partial class CommandFormsPageViewModel : ViewModelBase
     {
         if (SelectedForm is null)
         {
-            StatusMessage = "Sélectionnez un formulaire.";
+            this.SetWarningStatus("Sélectionnez un formulaire.");
             return;
         }
 
@@ -92,7 +97,7 @@ public partial class CommandFormsPageViewModel : ViewModelBase
     {
         if (SelectedForm is null)
         {
-            StatusMessage = "Sélectionnez un formulaire.";
+            this.SetWarningStatus("Sélectionnez un formulaire.");
             return;
         }
 
@@ -112,7 +117,7 @@ public partial class CommandFormsPageViewModel : ViewModelBase
     {
         if (SelectedForm is null)
         {
-            StatusMessage = "Sélectionnez un formulaire.";
+            this.SetWarningStatus("Sélectionnez un formulaire.");
             return;
         }
 

src/PostIt/PostIt/ViewModels/Commands/BillingCommandPageViewModel.cs

@@ -9,7 +9,7 @@ using Yavsc.Models.Billing;
 
 namespace PostIt.ViewModels;
 
-public abstract partial class BillingCommandPageViewModel : RemoteViewModelBase
+public abstract partial class BillingCommandPageViewModel : RemoteViewModelBase, IActionStatusViewModel
 {
     protected readonly BillingApiClient _billingClient;
 
@@ -21,7 +21,10 @@ public abstract partial class BillingCommandPageViewModel : RemoteViewModelBase
     public partial bool IsBusy { get; set; }
 
     [ObservableProperty]
-    public partial string StatusMessage { get; set; }
+    public partial string StatusMessage { get; set; } = "Pret.";
+
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Pret.");
 
     [ObservableProperty]
     public partial string Reason { get; set; } = string.Empty;
@@ -75,7 +78,7 @@ public abstract partial class BillingCommandPageViewModel : RemoteViewModelBase
         Form = form ?? throw new ArgumentNullException(nameof(form));
         _billingClient = billingClient ?? throw new ArgumentNullException(nameof(billingClient));
 
-        StatusMessage = SupportMessage;
+        this.SetInfoStatus(SupportMessage);
     }
 
     partial void OnExistingQueryIdChanged(long? value)

src/PostIt/PostIt/ViewModels/Commands/BrushViewModel.cs

@@ -58,18 +58,20 @@ public partial class BrushViewModel : RdvViewModel
                 SelectedPrestation = AvailablePrestations.FirstOrDefault();
             }
 
-            StatusMessage = AvailablePrestations.Count == 0
+            this.SetStatus(
+                AvailablePrestations.Count == 0
                     ? "Aucune prestation coiffure disponible."
-                : SupportMessage;
+                    : SupportMessage,
+                AvailablePrestations.Count == 0 ? StatusSeverity.Warning : StatusSeverity.Info);
         }
         catch (HttpRequestException ex)
         when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
         {
-            StatusMessage = "Accès refusé au catalogue de prestations (scope 'api'). Déconnectez puis reconnectez-vous.";
+            this.SetWarningStatus("Accès refusé au catalogue de prestations (scope 'api'). Déconnectez puis reconnectez-vous.");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur lors du chargement des prestations: {ex.Message}";
+            this.SetErrorStatus($"Erreur lors du chargement des prestations: {ex.Message}");
         }
         finally
         {
@@ -81,19 +83,19 @@ public partial class BrushViewModel : RdvViewModel
     {
         if (!Consent)
         {
-            StatusMessage = "Le consentement est requis pour poster la commande.";
+            this.SetWarningStatus("Le consentement est requis pour poster la commande.");
             return;
         }
 
         if (string.IsNullOrWhiteSpace(Address))
         {
-            StatusMessage = "L'adresse du rendez-vous est requise.";
+            this.SetWarningStatus("L'adresse du rendez-vous est requise.");
             return;
         }
 
         if (SelectedPrestation is null)
         {
-            StatusMessage = "Sélectionnez une prestation coiffure.";
+            this.SetWarningStatus("Sélectionnez une prestation coiffure.");
             return;
         }
 
@@ -143,18 +145,18 @@ public partial class BrushViewModel : RdvViewModel
                 }).ConfigureAwait(true);
             }
 
-            StatusMessage = IsEditingExisting
+            this.SetInfoStatus(IsEditingExisting
                 ? $"Commande #{ExistingQueryId} mise à jour sur {BillingRoute} pour {Performer.UserName}."
-                : $"Commande transmise sur {BillingRoute} pour {Performer.UserName}.";
+                : $"Commande transmise sur {BillingRoute} pour {Performer.UserName}.");
         }
         catch (HttpRequestException ex)
         when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
         {
-            StatusMessage = "Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.";
+            this.SetWarningStatus("Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur lors de l'envoi de la commande: {ex.Message}";
+            this.SetErrorStatus($"Erreur lors de l'envoi de la commande: {ex.Message}");
         }
         finally
         {

src/PostIt/PostIt/ViewModels/Commands/MBrushViewModel.cs

@@ -49,20 +49,20 @@ public partial class MBrushViewModel : BrushViewModel
     {
         if (!Consent)
         {
-            StatusMessage = "Le consentement est requis pour poster la commande.";
+            this.SetWarningStatus("Le consentement est requis pour poster la commande.");
             return;
         }
 
         if (string.IsNullOrWhiteSpace(Address))
         {
-            StatusMessage = "L'adresse du rendez-vous est requise.";
+            this.SetWarningStatus("L'adresse du rendez-vous est requise.");
             return;
         }
 
         var selectedPrestations = MultiPrestations.Where(x => x.IsSelected).ToList();
         if (selectedPrestations.Count == 0)
         {
-            StatusMessage = "Sélectionnez au moins une prestation coiffure.";
+            this.SetWarningStatus("Sélectionnez au moins une prestation coiffure.");
             return;
         }
 
@@ -109,18 +109,18 @@ public partial class MBrushViewModel : BrushViewModel
                 }).ConfigureAwait(true);
             }
 
-            StatusMessage = IsEditingExisting
+            this.SetInfoStatus(IsEditingExisting
                 ? $"Commande #{ExistingQueryId} mise à jour sur {BillingRoute} pour {Performer.UserName}."
-                : $"Commande transmise sur {BillingRoute} pour {Performer.UserName}.";
+                : $"Commande transmise sur {BillingRoute} pour {Performer.UserName}.");
         }
         catch (HttpRequestException ex)
             when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
         {
-            StatusMessage = "Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.";
+            this.SetWarningStatus("Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur lors de l'envoi de la commande: {ex.Message}";
+            this.SetErrorStatus($"Erreur lors de l'envoi de la commande: {ex.Message}");
         }
         finally
         {

src/PostIt/PostIt/ViewModels/Commands/RdvViewModel.cs

@@ -54,7 +54,7 @@ public partial class RdvViewModel : BillingCommandPageViewModel
             Longitude = existingQuery.Location.Longitude;
         }
 
-        StatusMessage = $"Commande #{existingQuery.Id} chargée.";
+        this.SetInfoStatus($"Commande #{existingQuery.Id} chargée.");
     }
 
     [RelayCommand(CanExecute = nameof(CanUseCurrentLocation))]
@@ -71,23 +71,23 @@ public partial class RdvViewModel : BillingCommandPageViewModel
             var result = await Platform.TryGetCurrentLocationAsync(default).ConfigureAwait(true);
             if (!result.IsSuccess || !result.Latitude.HasValue || !result.Longitude.HasValue)
             {
-                StatusMessage = result.Message;
+                this.SetWarningStatus(result.Message);
                 return;
             }
 
             Latitude = result.Latitude.Value;
             Longitude = result.Longitude.Value;
-            StatusMessage = string.IsNullOrWhiteSpace(Address)
+            this.SetInfoStatus(string.IsNullOrWhiteSpace(Address)
                 ? "Position récupérée. Complétez l'adresse puis envoyez la commande."
-                : result.Message;
+                : result.Message);
         }
         catch (OperationCanceledException)
         {
-            StatusMessage = "La récupération de la position a été annulée.";
+            this.SetWarningStatus("La récupération de la position a été annulée.");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Impossible de récupérer la position: {ex.Message}";
+            this.SetErrorStatus($"Impossible de récupérer la position: {ex.Message}");
         }
         finally
         {
@@ -118,26 +118,26 @@ public partial class RdvViewModel : BillingCommandPageViewModel
     {
         if (!IsSupported)
         {
-            StatusMessage = SupportMessage;
+            this.SetWarningStatus(SupportMessage);
             return;
         }
 
         if (!Consent)
         {
-            StatusMessage = "Le consentement est requis pour poster la commande.";
+            this.SetWarningStatus("Le consentement est requis pour poster la commande.");
             return;
         }
 
         if (string.IsNullOrWhiteSpace(Address))
         {
-            StatusMessage = "L'adresse du rendez-vous est requise.";
+            this.SetWarningStatus("L'adresse du rendez-vous est requise.");
             return;
         }
 
 
         if (string.IsNullOrWhiteSpace(Reason))
         {
-            StatusMessage = "Le motif du rendez-vous est requis.";
+            this.SetWarningStatus("Le motif du rendez-vous est requis.");
             return;
         }
 
@@ -186,17 +186,17 @@ public partial class RdvViewModel : BillingCommandPageViewModel
                 }).ConfigureAwait(true);
             }
 
-            StatusMessage = IsEditingExisting
+            this.SetInfoStatus(IsEditingExisting
                 ? $"Commande #{ExistingQueryId} mise à jour sur {BillingRoute} pour {Performer.UserName}."
-                : $"Commande transmise sur {BillingRoute} pour {Performer.UserName}.";
+                : $"Commande transmise sur {BillingRoute} pour {Performer.UserName}.");
         }
         catch (HttpRequestException ex) when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
         {
-            StatusMessage = "Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.";
+            this.SetWarningStatus("Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur lors de l'envoi: {ex.Message}";
+            this.SetErrorStatus($"Erreur lors de l'envoi: {ex.Message}");
         }
         finally
         {

src/PostIt/PostIt/ViewModels/MainViewModel.cs

@@ -12,7 +12,7 @@ using PostIt.Helpers;
 
 namespace PostIt.ViewModels;
 
-public partial class MainViewModel : ViewModelBase
+public partial class MainViewModel : ViewModelBase, IActionStatusViewModel
 {
     /// <summary>Window/tab title. Cosmetic — bound by
     /// <c>MainPage.axaml</c> if at all. Not the post title.</summary>
@@ -54,6 +54,9 @@ public partial class MainViewModel : ViewModelBase
     [ObservableProperty]
     public partial string StatusMessage { get; set; }
 
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Pret.");
+
     [ObservableProperty]
     public partial string SearchText { get; set; }
 
@@ -84,7 +87,7 @@ public partial class MainViewModel : ViewModelBase
                 Posts.Add(post);
             }
             ApplyFilter();
-            StatusMessage = $"Loaded {Posts.Count} posts.";
+            this.SetInfoStatus($"{Posts.Count} billet(s) chargé(s).");
         });
     }
 
@@ -104,7 +107,7 @@ public partial class MainViewModel : ViewModelBase
         // than to send a request the server will reject.
         if (string.IsNullOrWhiteSpace(DraftTitle))
         {
-            StatusMessage = "Title is required.";
+            this.SetWarningStatus("Le titre est obligatoire.");
             return;
         }
 
@@ -134,7 +137,7 @@ public partial class MainViewModel : ViewModelBase
                 if (created is not null)
                 {
                     SelectedPost = created;
-                    StatusMessage = $"Created post {created.Id}.";
+                    this.SetInfoStatus($"Billet {created.Id} créé.");
                 }
             }
             else
@@ -150,7 +153,7 @@ public partial class MainViewModel : ViewModelBase
                     DateModified = DateTime.UtcNow,
                 };
                 await BlogClient!.UpdatePostAsync(SelectedPost.Id, update);
-                StatusMessage = $"Saved post {SelectedPost.Id}.";
+                this.SetInfoStatus($"Billet {SelectedPost.Id} enregistré.");
             }
 
             await RefreshPostsAsync();
@@ -162,14 +165,14 @@ public partial class MainViewModel : ViewModelBase
     {
         if (SelectedPost is null || SelectedPost.Id == 0)
         {
-            StatusMessage = "Select an existing post before deleting.";
+            this.SetWarningStatus("Sélectionnez un billet existant avant suppression.");
             return;
         }
 
         await ExecuteAsync(async () =>
         {
             await BlogClient!.DeletePostAsync(SelectedPost.Id);
-            StatusMessage = $"Deleted post {SelectedPost.Id}.";
+            this.SetInfoStatus($"Billet {SelectedPost.Id} supprimé.");
             SelectedPost = null;
             await RefreshPostsAsync();
         });
@@ -194,7 +197,7 @@ public partial class MainViewModel : ViewModelBase
     {
         if (SelectedPost is null || SelectedPost.Id == 0)
         {
-            StatusMessage = "Sélectionnez un billet existant pour changer sa publication.";
+            this.SetWarningStatus("Sélectionnez un billet existant pour changer sa publication.");
             return;
         }
 
@@ -211,9 +214,9 @@ public partial class MainViewModel : ViewModelBase
             // locally flipped state until the round-trip
             // re-hydrates it.
             SelectedPost.IsPublished = publish;
-            StatusMessage = publish
+            this.SetInfoStatus(publish
                 ? $"Billet {SelectedPost.Id} publié."
-                : $"Billet {SelectedPost.Id} remis en brouillon.";
+                : $"Billet {SelectedPost.Id} remis en brouillon.");
         });
     }
 
@@ -247,7 +250,7 @@ public partial class MainViewModel : ViewModelBase
     {
         if (SelectedPost is null)
         {
-            StatusMessage = "Select an existing post before managing ACL.";
+            this.SetWarningStatus("Sélectionnez un billet existant avant de gérer l'ACL.");
             return;
         }
 
@@ -346,7 +349,7 @@ public partial class MainViewModel : ViewModelBase
         FilteredPosts = new ObservableCollection<BlogPostDto>();
         SelectedPost = null;
         IsBusy = false;
-        StatusMessage = "Ready";
+        this.SetInfoStatus("Prêt.");
         Settings = settings ?? new Settings();
         SearchText = Settings.SearchText;
         WindowTitle = "PostIt";
@@ -476,12 +479,12 @@ public partial class MainViewModel : ViewModelBase
         try
         {
             IsBusy = true;
-            StatusMessage = "Working...";
+            this.SetInfoStatus("Traitement en cours...");
             await action();
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Error: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {

src/PostIt/PostIt/ViewModels/PostAclDialogViewModel.cs

@@ -37,7 +37,7 @@ public sealed class PostAclEntry
 /// any 403 / 404 will surface as an exception caught by the
 /// command and routed to <see cref="StatusMessage"/>.</para>
 /// </summary>
-public partial class PostAclDialogViewModel : ViewModelBase
+public partial class PostAclDialogViewModel : ViewModelBase, IActionStatusViewModel
 {
     private readonly BlogAclApiClient _aclClient;
     private readonly CircleApiClient _circleClient;
@@ -61,7 +61,10 @@ public partial class PostAclDialogViewModel : ViewModelBase
     public partial bool IsBusy { get; set; }
 
     [ObservableProperty]
-    public partial string StatusMessage { get; set; } = string.Empty;
+    public partial string StatusMessage { get; set; } = "Pret.";
+
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Pret.");
 
     /// <summary>
     /// Idempotency gate for <see cref="LoadAsync"/>: the dialog
@@ -115,12 +118,12 @@ public partial class PostAclDialogViewModel : ViewModelBase
             AclEntries = new ObservableCollection<PostAclEntry>(AclEntries.Select(a => ToAclEntry(a.CircleId)));
 
 
-            StatusMessage = $"{AclEntries.Count} autorisation(s)";
+            this.SetInfoStatus($"{AclEntries.Count} autorisation(s)");
             _loaded = true;
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {
@@ -133,7 +136,7 @@ public partial class PostAclDialogViewModel : ViewModelBase
     {
         if (SelectedCircleToAdd is null)
         {
-            StatusMessage = "Sélectionnez un cercle à ajouter";
+            this.SetWarningStatus("Sélectionnez un cercle à ajouter");
             return;
         }
 
@@ -142,7 +145,7 @@ public partial class PostAclDialogViewModel : ViewModelBase
         {
             if (AclEntries.Any(a => a.CircleId == SelectedCircleToAdd.Id))
             {
-                StatusMessage = $"Cercle « {SelectedCircleToAdd.Name} » déjà autorisé";
+                this.SetWarningStatus($"Cercle « {SelectedCircleToAdd.Name} » déjà autorisé");
                 return;
             }
 
@@ -154,11 +157,11 @@ public partial class PostAclDialogViewModel : ViewModelBase
             if (created is not null)
             {
                 AclEntries.Add(ToAclEntry(created.CircleId));
-                StatusMessage = $"Cercle « {SelectedCircleToAdd.Name} » autorisé";
+                this.SetInfoStatus($"Cercle « {SelectedCircleToAdd.Name} » autorisé");
             }
             else
             {
-                StatusMessage = "Autorisation refusée par le serveur";
+                this.SetWarningStatus("Autorisation refusée par le serveur");
             }
         }
         catch (HttpRequestException ex) when (ex.StatusCode == HttpStatusCode.Conflict)
@@ -166,11 +169,11 @@ public partial class PostAclDialogViewModel : ViewModelBase
             // Conflict means the link already exists in backend. Resync
             // from the dedicated ACL API so the UI reflects server truth.
             await ReloadAclEntriesFromServerAsync();
-            StatusMessage = $"Cercle « {SelectedCircleToAdd.Name} » déjà autorisé";
+            this.SetWarningStatus($"Cercle « {SelectedCircleToAdd.Name} » déjà autorisé");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {
@@ -189,11 +192,11 @@ public partial class PostAclDialogViewModel : ViewModelBase
             var existing = AclEntries.FirstOrDefault(e => e.CircleId == acl.CircleId);
             if (existing is not null)
                 AclEntries.Remove(existing);
-            StatusMessage = "Autorisation révoquée";
+            this.SetInfoStatus("Autorisation révoquée");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         finally
         {

src/PostIt/PostIt/ViewModels/Settings/Settings.cs

@@ -31,6 +31,19 @@ public partial class Settings : ViewModelBase
     [ObservableProperty]
     public partial string SearchText { get; set; } = string.Empty;
 
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Pret.");
+
+    public void SetActionStatus(string message, StatusSeverity severity = StatusSeverity.Info)
+    {
+        ActionStatus = severity switch
+        {
+            StatusSeverity.Error => StatusNotice.Error(message),
+            StatusSeverity.Warning => StatusNotice.Warning(message),
+            _ => StatusNotice.Info(message),
+        };
+    }
+
     /// <summary>
     /// Catch top-level mutations: the four ObservableProperty
     /// setters above all funnel through here, and we flip
@@ -406,6 +419,8 @@ public partial class Settings : ViewModelBase
     [RelayCommand(CanExecute = nameof(CanSave))]
     public void Save()
     {
+        SetActionStatus("Enregistrement des parametres...", StatusSeverity.Info);
+
         var configDir = Path.Combine(
             Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
             "PostIt");
@@ -425,10 +440,13 @@ public partial class Settings : ViewModelBase
                     File.SetUnixFileMode(configPath,
                         UnixFileMode.UserRead | UnixFileMode.UserWrite);
                 IsDirty = false;
+                SetActionStatus("Parametres sauvegardes.", StatusSeverity.Info);
+                
                 Console.WriteLine($"💾 Settings saved to {configPath}");
             }
             catch (Exception ex)
             {
+                SetActionStatus($"Echec sauvegarde parametres: {ex.Message}", StatusSeverity.Error);
                 Console.Error.WriteLine($"🩎 Error saving settings to {configPath}: {ex.Message}");
                 throw;
             }

src/PostIt/PostIt/ViewModels/SignaturePageViewModel.cs

@@ -30,7 +30,7 @@ namespace PostIt.ViewModels;
 /// until the Yavsc.Org endpoint exists; the contract there will
 /// be <c>POST /api/signature/{devisId}</c> with this same payload.
 /// </summary>
-public partial class SignaturePageViewModel : ViewModelBase
+public partial class SignaturePageViewModel : ViewModelBase, IActionStatusViewModel
 {
     /// <summary>
     /// Default capture surface, in DIPs. 3:1 ratio matches a
@@ -42,6 +42,9 @@ public partial class SignaturePageViewModel : ViewModelBase
     [ObservableProperty]
     public partial string StatusMessage { get; set; } = "Prêt.";
 
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Prêt.");
+
     [ObservableProperty]
     public partial int StrokeCount { get; set; }
 
@@ -107,7 +110,7 @@ public partial class SignaturePageViewModel : ViewModelBase
 
     private void OnStrokeCompleted(object? sender, SignaturePadData data)
     {
-        StatusMessage = $"Trait terminé. {data.StrokeCount} trait(s).";
+        this.SetInfoStatus($"Trait terminé. {data.StrokeCount} trait(s).");
         RefreshCounts();
     }
 
@@ -125,7 +128,7 @@ public partial class SignaturePageViewModel : ViewModelBase
     public void Clear()
     {
         _control?.Clear();
-        StatusMessage = "Effacé.";
+        this.SetInfoStatus("Effacé.");
         RefreshCounts();
     }
 
@@ -134,14 +137,14 @@ public partial class SignaturePageViewModel : ViewModelBase
     {
         if (_control is null)
         {
-            StatusMessage = "Contrôle non attaché.";
+            this.SetWarningStatus("Contrôle non attaché.");
             return;
         }
 
         var data = _control.Snapshot();
         if (data.IsEmpty)
         {
-            StatusMessage = "Rien à capturer.";
+            this.SetWarningStatus("Rien à capturer.");
             return;
         }
 
@@ -149,11 +152,11 @@ public partial class SignaturePageViewModel : ViewModelBase
         {
             var path = WriteCapture(data);
             LastCapturedPath = path;
-            StatusMessage = $"Capture enregistrée: {path}";
+            this.SetInfoStatus($"Capture enregistrée: {path}");
         }
         catch (Exception ex)
         {
-            StatusMessage = $"Erreur: {ex.Message}";
+            this.SetErrorStatus($"Erreur: {ex.Message}");
         }
         await Task.CompletedTask;
     }

src/PostIt/PostIt/ViewModels/StatusNotice.cs

@@ -0,0 +1,35 @@
+namespace PostIt.ViewModels;
+
+public enum StatusSeverity
+{
+    Info,
+    Warning,
+    Error
+}
+
+public sealed class StatusNotice
+{
+    public string Message { get; }
+    public StatusSeverity Severity { get; }
+    public string Glyph { get; }
+    public string Background { get; }
+    public string BorderBrush { get; }
+    public string Foreground { get; }
+
+    private StatusNotice(string message, StatusSeverity severity)
+    {
+        Message = string.IsNullOrWhiteSpace(message) ? "Pret." : message;
+        Severity = severity;
+
+        (Glyph, Background, BorderBrush, Foreground) = severity switch
+        {
+            StatusSeverity.Error => ("!", "#FDECEA", "#C62828", "#7F1D1D"),
+            StatusSeverity.Warning => ("~", "#FFF8E1", "#E6A700", "#7C4A03"),
+            _ => ("i", "#E8F0FE", "#5B8DEF", "#1E3A8A"),
+        };
+    }
+
+    public static StatusNotice Info(string message) => new(message, StatusSeverity.Info);
+    public static StatusNotice Warning(string message) => new(message, StatusSeverity.Warning);
+    public static StatusNotice Error(string message) => new(message, StatusSeverity.Error);
+}

src/PostIt/PostIt/Views/ActivitiesPage.axaml

@@ -1,6 +1,7 @@
 <ContentPage xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:vm="using:PostIt.ViewModels"
+             xmlns:postitControls="using:PostIt.Controls"
              xmlns:wf="using:Yavsc.Abstract.Workflow"
              x:Class="PostIt.Views.ActivitiesPage"
              x:DataType="vm:ActivitiesPageViewModel"
@@ -131,16 +132,8 @@
         </Grid>
 
         <Grid Grid.Row="2" ColumnDefinitions="*,Auto">
-            <TextBox Grid.Column="0"
+            <postitControls:StatusBar Grid.Column="0"
-                     Text="{Binding StatusMessage}"
+                                      DataContext="{Binding ActionStatus}" />
-                     IsReadOnly="True"
-                     AcceptsReturn="True"
-                     TextWrapping="Wrap"
-                     BorderThickness="0"
-                     BorderBrush="Transparent"
-                     Padding="0"
-                     Background="Transparent"
-                     VerticalAlignment="Center" />
             <ProgressBar Grid.Column="1" Width="120" IsIndeterminate="True" IsVisible="{Binding IsBusy}" />
         </Grid>
     </Grid>

src/PostIt/PostIt/Views/AddCircleMemberDialog.axaml

@@ -3,6 +3,7 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         x:Class="PostIt.Views.AddCircleMemberDialog"
         xmlns:vm="using:PostIt.ViewModels"
+    xmlns:postitControls="using:PostIt.Controls"
         xmlns:services="using:PostIt.Services"
         x:DataType="vm:AddCircleMemberDialogViewModel"
       >
@@ -47,8 +48,8 @@
 
         <!-- Action buttons -->
         <Grid Grid.Row="3" ColumnDefinitions="*,Auto,Auto" Margin="0,8,0,0">
-            <TextBlock Grid.Column="0" Text="{Binding StatusMessage}"
+            <postitControls:StatusBar Grid.Column="0"
-                       VerticalAlignment="Center"/>
+                                      DataContext="{Binding ActionStatus}" />
             <Button Grid.Column="1" Content="Ajouter"
                     x:Name="AddButton"
                     Command="{Binding AddAsync}"

src/PostIt/PostIt/Views/AddCircleMemberDialog.axaml.cs

@@ -1,10 +1,8 @@
 
 using Avalonia.Markup.Xaml;
-using Avalonia.Interactivity;
 using Avalonia.VisualTree;
 using PostIt.Services;
 using PostIt.ViewModels;
-using System.Threading.Tasks;
 
 namespace PostIt.Views;
 
@@ -41,10 +39,4 @@ public partial class AddCircleMemberDialog : Avalonia.Controls.ContentPage
     /// </summary>
     public AddCircleMemberDialogViewModel? ViewModel
         => DataContext as AddCircleMemberDialogViewModel;
-
-    private async Task OnCloseClicked(object? sender, RoutedEventArgs e)
-    {
-        App app = App.Current! as App;
-        await app!.GoBackAsync();
-    }
 }

src/PostIt/PostIt/Views/BillingQueriesPage.axaml

@@ -1,6 +1,7 @@
 <ContentPage xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:vm="using:PostIt.ViewModels"
+             xmlns:postitControls="using:PostIt.Controls"
              x:Class="PostIt.Views.BillingQueriesPage"
              x:DataType="vm:BillingQueriesPageViewModel"
              Header="Commandes billing">
@@ -36,16 +37,8 @@
         </ListBox>
 
         <Grid Grid.Row="3" ColumnDefinitions="*,Auto" Margin="0,12,0,0">
-            <TextBox Grid.Column="0"
+            <postitControls:StatusBar Grid.Column="0"
-                     Text="{Binding StatusMessage}"
+                                      DataContext="{Binding ActionStatus}" />
-                     IsReadOnly="True"
-                     AcceptsReturn="True"
-                     TextWrapping="Wrap"
-                     BorderThickness="0"
-                     BorderBrush="Transparent"
-                     Padding="0"
-                     Background="Transparent"
-                     VerticalAlignment="Center" />
             <ProgressBar Grid.Column="1" Width="120" IsIndeterminate="True" IsVisible="{Binding IsBusy}" />
         </Grid>
     </Grid>

src/PostIt/PostIt/Views/CirclesPage.axaml

@@ -1,6 +1,7 @@
 <ContentPage
         xmlns="https://github.com/avaloniaui"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:postitControls="using:PostIt.Controls"
         x:Class="PostIt.Views.CirclesPage"
         xmlns:vm="using:PostIt.ViewModels"
         xmlns:dtos="using:Yavsc.Api.Client.Dtos"
@@ -101,8 +102,8 @@
 
         <!-- Status bar -->
         <Grid Grid.Row="2" ColumnDefinitions="*,Auto" Margin="12,0,12,12">
-            <TextBlock Grid.Column="0" Text="{Binding StatusMessage}"
+            <postitControls:StatusBar Grid.Column="0"
-                       VerticalAlignment="Center"/>
+                                      DataContext="{Binding ActionStatus}" />
             <ProgressBar Grid.Column="1" IsIndeterminate="True"
                          IsVisible="{Binding IsBusy}"
                          Width="120"/>

src/PostIt/PostIt/Views/CommandFormsPage.axaml

@@ -1,6 +1,7 @@
 <ContentPage xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:vm="using:PostIt.ViewModels"
+             xmlns:postitControls="using:PostIt.Controls"
              xmlns:wf="using:Yavsc.Abstract.Workflow"
              x:Class="PostIt.Views.CommandFormsPage"
              x:DataType="vm:CommandFormsPageViewModel"
@@ -41,16 +42,8 @@
             <Button Grid.Column="4"
                     Content="Demandes en cours (lecture seule)"
                     Command="{Binding OpenOngoingQueriesCommand}" />
-            <TextBox Grid.Column="6"
+            <postitControls:StatusBar Grid.Column="6"
-                     Text="{Binding StatusMessage}"
+                                      DataContext="{Binding ActionStatus}" />
-                     IsReadOnly="True"
-                     AcceptsReturn="True"
-                     TextWrapping="Wrap"
-                     BorderThickness="0"
-                     BorderBrush="Transparent"
-                     Padding="0"
-                     Background="Transparent"
-                     VerticalAlignment="Center" />
         </Grid>
     </Grid>
 </ContentPage>

src/PostIt/PostIt/Views/Commands/BrushPage.axaml

@@ -3,6 +3,7 @@
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:cvm="using:PostIt.ViewModels.Commands"
+             xmlns:postitControls="using:PostIt.Controls"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="PostIt.Views.Commands.BrushPage"
 
@@ -93,16 +94,8 @@
                 Content="{Binding SubmitLabel}"
                 Command="{Binding SubmitCommand}"
                 IsEnabled="{Binding IsSupported}" />
-        <TextBox Grid.Column="2"
+        <postitControls:StatusBar Grid.Column="2"
-                 Text="{Binding StatusMessage}"
+                DataContext="{Binding ActionStatus}" />
-                 IsReadOnly="True"
-                 AcceptsReturn="True"
-                 TextWrapping="Wrap"
-                 BorderThickness="0"
-                 BorderBrush="Transparent"
-                 Padding="0"
-                 Background="Transparent"
-                 VerticalAlignment="Center" />
         <ProgressBar Grid.Column="3"
                      Width="120"
                      IsIndeterminate="True"

src/PostIt/PostIt/Views/Commands/RdvPage.axaml

@@ -1,6 +1,7 @@
 <ContentPage xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:cvm="using:PostIt.ViewModels.Commands"
+             xmlns:postitControls="using:PostIt.Controls"
              x:Class="PostIt.Views.Commands.RdvPage"
              x:DataType="cvm:RdvViewModel"
              Header="Commande billing">
@@ -71,16 +72,8 @@
                 Content="{Binding SubmitLabel}"
                 Command="{Binding SubmitCommand}"
                 IsEnabled="{Binding IsSupported}" />
-        <TextBox Grid.Column="2"
+        <postitControls:StatusBar Grid.Column="2"
-                 Text="{Binding StatusMessage}"
+                DataContext="{Binding ActionStatus}" />
-                 IsReadOnly="True"
-                 AcceptsReturn="True"
-                 TextWrapping="Wrap"
-                 BorderThickness="0"
-                 BorderBrush="Transparent"
-                 Padding="0"
-                 Background="Transparent"
-                 VerticalAlignment="Center" />
         <ProgressBar Grid.Column="3"
                      Width="120"
                      IsIndeterminate="True"

src/PostIt/PostIt/Views/MainPage.axaml

@@ -3,6 +3,7 @@
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:vm="using:PostIt.ViewModels"
+             xmlns:postitControls="using:PostIt.Controls"
              xmlns:models="using:Yavsc.Blogspot"
              xmlns:views="using:PostIt.Views"
              xmlns:AvaloniaEdit="clr-namespace:AvaloniaEdit;assembly=AvaloniaEdit"
@@ -104,7 +105,8 @@
                   VerticalAlignment="Stretch">
                 </TextBox>
 
-                <TextBlock Grid.Row="3" Text="{Binding StatusMessage}" Foreground="Gray" />
+                <postitControls:StatusBar Grid.Row="3"
+                                          DataContext="{Binding ActionStatus}" />
 
             </Grid>
         </Border>

src/PostIt/PostIt/Views/PostAclDialog.axaml

@@ -3,6 +3,7 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         x:Class="PostIt.Views.PostAclDialog"
         xmlns:vm="using:PostIt.ViewModels"
+    xmlns:postitControls="using:PostIt.Controls"
                 xmlns:dtos="using:Yavsc.Api.Client.Dtos"
         x:DataType="vm:PostAclDialogViewModel"
       >
@@ -53,8 +54,8 @@
 
         <!-- Status bar -->
         <Grid Grid.Row="3" ColumnDefinitions="*,Auto">
-            <TextBlock Grid.Column="0" Text="{Binding StatusMessage}"
+            <postitControls:StatusBar Grid.Column="0"
-                       VerticalAlignment="Center"/>
+                                      DataContext="{Binding ActionStatus}" />
             <ProgressBar Grid.Column="1" IsIndeterminate="True"
                          IsVisible="{Binding IsBusy}"
                          Width="120"/>

src/PostIt/PostIt/Views/SettingsPage.axaml

@@ -2,6 +2,7 @@
         xmlns="https://github.com/avaloniaui"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:controls="cl:avalonia.Controls"
+    xmlns:postitControls="using:PostIt.Controls"
         x:Class="PostIt.Views.SettingsPage"
         xmlns:vm="using:PostIt.ViewModels"
         x:DataType="vm:Settings"
@@ -51,9 +52,7 @@
                    Opacity="0.8"
                    TextWrapping="Wrap" />
 
-            <TextBlock x:Name="AvatarUploadStatusText"
+            <postitControls:StatusBar DataContext="{Binding ActionStatus}"/>
-                       Text=""
-                       TextWrapping="Wrap" />
 
             <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
             <Button x:Name="ChooseAvatarButton"

src/PostIt/PostIt/Views/SettingsPage.axaml.cs

@@ -6,10 +6,10 @@ using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using Avalonia.Controls;
-using Avalonia.Media;
 using Avalonia.Platform.Storage;
 using Microsoft.Extensions.DependencyInjection;
 using PostIt.Services;
+using PostIt.ViewModels;
 
 namespace PostIt.Views;
 public partial class SettingsPage: ContentPage
@@ -28,12 +28,12 @@ public partial class SettingsPage: ContentPage
     {
         var statusVersion = Interlocked.Increment(ref _avatarStatusVersion);
         ChooseAvatarButton.IsEnabled = false;
-        SetAvatarStatus("Sélection d'un fichier avatar...", Brushes.Gray);
+        SetAvatarStatus("Selection d'un fichier avatar...", StatusSeverity.Info);
 
         var topLevel = TopLevel.GetTopLevel(this);
         if (topLevel is null)
         {
-            SetAvatarStatus("Impossible d'accéder à la fenêtre active.", Brushes.IndianRed);
+            SetAvatarStatus("Impossible d'acceder a la fenetre active.", StatusSeverity.Error);
             ChooseAvatarButton.IsEnabled = true;
             return;
         }
@@ -54,27 +54,28 @@ public partial class SettingsPage: ContentPage
         var file = files.FirstOrDefault();
         if (file is null)
         {
-            SetAvatarStatus("Upload annulé.", Brushes.Gray);
+            SetAvatarStatus("Upload annule.", StatusSeverity.Warning);
             ChooseAvatarButton.IsEnabled = true;
             return;
         }
 
         try
         {
-            SetAvatarStatus("Upload avatar en cours...", Brushes.Gray);
+            SetAvatarStatus("Upload avatar en cours...", StatusSeverity.Info);
 
             await using var stream = await file.OpenReadAsync();
             var api = ((App)App.Current!).ServiceProvider!.GetRequiredService<YavscApiClient>();
             var message = await api.SetAvatarAsync(stream, file.Name, GetMimeType(file.Name));
             SetAvatarStatus(string.IsNullOrWhiteSpace(message)
-                ? "Avatar mis à jour."
+                ? "Avatar mis a jour."
-                : message, Brushes.ForestGreen);
+                : message,
+                StatusSeverity.Info);
 
             _ = ClearSuccessStatusLaterAsync(statusVersion);
         }
         catch (Exception ex)
         {
-            SetAvatarStatus($"Échec upload avatar: {ex.Message}", Brushes.IndianRed);
+            SetAvatarStatus($"Echec upload avatar: {ex.Message}", StatusSeverity.Error);
             Console.Error.WriteLine($"🩎 Avatar upload failed: {ex.Message}");
         }
         finally
@@ -89,16 +90,15 @@ public partial class SettingsPage: ContentPage
         if (statusVersion != _avatarStatusVersion)
             return;
 
-        if (AvatarUploadStatusText.Foreground == Brushes.ForestGreen)
+        SetAvatarStatus($"Avatar pret. Formats supportes: {AcceptedAvatarFormats}. Taille max: {MaxAvatarSizeMegabytes} MB.", StatusSeverity.Info);
-        {
-            SetAvatarStatus($"Avatar prêt. Formats supportés: {AcceptedAvatarFormats}. Taille max: {MaxAvatarSizeMegabytes} MB.", Brushes.Gray);
-        }
     }
 
-    private void SetAvatarStatus(string message, IBrush color)
+    private void SetAvatarStatus(string message, StatusSeverity severity)
     {
-        AvatarUploadStatusText.Foreground = color;
+        if (DataContext is Settings settings)
-        AvatarUploadStatusText.Text = message;
+        {
+            settings.SetActionStatus(message, severity);
+        }
     }
 
     private static string GetMimeType(string fileName)

src/PostIt/PostIt/Views/SignaturePage.axaml

@@ -3,6 +3,7 @@
              xmlns:d="http://github.com/avaloniaui/avalonia"
              xmlns:vm="using:PostIt.ViewModels"
              xmlns:controls="using:PostIt.Controls"
+             xmlns:postitControls="using:PostIt.Controls"
              x:Class="PostIt.Views.SignaturePage"
              x:DataType="vm:SignaturePageViewModel"
              HorizontalAlignment="Stretch"
@@ -59,10 +60,8 @@
             <Button Content="Capturer" Command="{Binding CaptureAsync}" />
         </StackPanel>
 
-        <TextBlock Grid.Row="3"
+        <postitControls:StatusBar Grid.Row="3"
-                   Text="{Binding StatusMessage}"
+                      DataContext="{Binding ActionStatus}" />
-                   Foreground="Gray"
-                   TextWrapping="Wrap" />
 
         <TextBlock Grid.Row="4"
                    FontSize="11"

src/Yavsc.Abstract/Billing/IBillable.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 using Yavsc.Services;
 
 namespace Yavsc.Billing

src/Yavsc.Abstract/Blogspot/BlogPostAuthorDto.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 namespace Yavsc.Blogspot;
 
 /// <summary>

src/Yavsc.Abstract/Blogspot/BlogPostDto.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 using Yavsc.Abstract.Identity.Security;
 using System.Text.Json.Serialization;
 

src/Yavsc.Abstract/Blogspot/IBlogPost.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 
 
 

src/Yavsc.Abstract/Chat/ChatHubConstants.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 namespace Yavsc.Abstract.Chat
 {
     public static class ChatHubConstants

src/Yavsc.Abstract/Chat/IChatRoom.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 using System.ComponentModel.DataAnnotations;
 
 namespace Yavsc.Abstract.Chat

src/Yavsc.Abstract/FileSystem/AbstractFileSystemHelpers.cs

@@ -1,4 +1,6 @@
-using System.Text;
+#nullable enable annotations
+
+using System.Text;
 using Yavsc.ViewModels.UserFiles;
 
 namespace Yavsc.Server.Helpers

src/Yavsc.Abstract/FileSystem/FsOperationInfo.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 namespace Yavsc.Abstract.Helpers
 {
     public enum ErrorCode {

src/Yavsc.Abstract/FileSystem/UserDirectoryInfo.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 using Yavsc.Server.Helpers;
 
 namespace Yavsc.ViewModels.UserFiles

src/Yavsc.Abstract/Google/GDate.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 //
 //  GDate.cs
 //

src/Yavsc.Abstract/Google/Messaging/MessageWithPayloadResponse.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 //
 //  MessageWithPayloadResponse.cs
 //

src/Yavsc.Abstract/IT/Fixing/Bug.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 using Yavsc.Attributes.Validation;

src/Yavsc.Abstract/Identity/IApplicationUser.cs

@@ -1,4 +1,6 @@
-namespace Yavsc.Abstract.Identity
+#nullable enable annotations
+
+namespace Yavsc.Abstract.Identity
 {
     public interface IApplicationUser
     {

src/Yavsc.Abstract/Identity/UserDisplayHelpers.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 namespace Yavsc.Abstract.Identity
 {
     /// <summary>

src/Yavsc.Abstract/Interfaces/Workflow/IBookQueryData.cs

@@ -1,4 +1,6 @@
-using Yavsc.Abstract.Identity;
+#nullable enable annotations
+
+using Yavsc.Abstract.Identity;
 
 namespace Yavsc.Interfaces
 {

src/Yavsc.Abstract/Messaging/Comment.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 
 using Yavsc.Interfaces;
 

src/Yavsc.Abstract/Messaging/Notification.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 

src/Yavsc.Abstract/Messaging/RdvQueryEvent.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 //
 //  BookQueryEvent.cs
 //

src/Yavsc.Abstract/Messaging/RdvQueryProviderInfo.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 using Yavsc.Abstract.Identity;
 using Yavsc.Models.Relationship;
 

src/Yavsc.Abstract/Workflow/IMobileDeviceDeclaration.cs

@@ -1,4 +1,6 @@
-// Copyright (C) 2016  Paul Schneider
+#nullable enable annotations
+
+// Copyright (C) 2016  Paul Schneider
 //
 // This file is part of yavsc.
 //

src/Yavsc.Abstract/Workflow/IPerformerProfile.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 namespace Yavsc.Workflow
 {
     public interface IPerformerProfile

src/Yavsc.Abstract/Workflow/PerformerCodeInputValidation.cs

@@ -1,3 +1,5 @@
+#nullable enable annotations
+
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;