UI: license summary becomes a colored badge in the top bar

The license info was rendered as plain secondary-grey text, easy to
miss. Now it's a rounded pill (CornerRadius=14) with traffic-light
colors driven by the new MainViewModel.LicenseSeverity property:

- Ok      → green pill (Brush.Status.Installed) with ✓ icon
- Warning → amber pill (Brush.Status.Busy)      with ⏰ icon, fires when
            entitlement is < 30 days away from expiry
- Error   → red pill (#EF4444 / #2A1414 bg)     with 🔒/⚠/🚫 icon
            depending on whether license is missing, expired, revoked

Two new VM properties accompany LicenseSummary:
- LicenseIcon: emoji glyph for the pill
- LicenseSeverity: enum-like string Ok/Warning/Error driving DataTriggers

Both are kept in sync via NotifyLicenseChanged(), called wherever
_license used to trigger only OnPropertyChanged(LicenseSummary).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/PSLauncher.App/ViewModels/MainViewModel.cs

@@ -69,13 +69,66 @@ public sealed partial class MainViewModel : ObservableObject
     {
         get
         {
-            if (_license is null) return "License : non configurée";
+            if (_license is null) return "Aucune license";
             if (_license.Status == "valid")
-                return $"License : {_license.OwnerName} • exp. {_license.DownloadEntitlementUntil:dd/MM/yyyy}";
+            {
-            if (_license.Status == "expired")
+                var until = _license.DownloadEntitlementUntil;
-                return $"License expirée le {_license.DownloadEntitlementUntil:dd/MM/yyyy}";
+                if (until is { } u && (u - DateTime.UtcNow).TotalDays < 30)
-            return $"License : {_license.Status}";
+                    return $"{_license.OwnerName} • exp. {u:dd/MM/yyyy}";
+                return $"{_license.OwnerName} • exp. {until:dd/MM/yyyy}";
             }
+            if (_license.Status == "expired")
+                return $"Expirée le {_license.DownloadEntitlementUntil:dd/MM/yyyy}";
+            if (_license.Status == "revoked")
+                return "Révoquée";
+            return _license.Status;
+        }
+    }
+
+    public string LicenseIcon
+    {
+        get
+        {
+            if (_license is null) return "🔒";
+            return _license.Status switch
+            {
+                "valid" when IsLicenseExpiringSoon() => "⏰",
+                "valid"                              => "✓",
+                "expired"                            => "⚠",
+                "revoked"                            => "🚫",
+                _                                    => "❓",
+            };
+        }
+    }
+
+    /// <summary>
+    /// Catégorie utilisée par la UI pour piloter la couleur du badge license.
+    /// </summary>
+    public string LicenseSeverity
+    {
+        get
+        {
+            if (_license is null) return "Error";
+            return _license.Status switch
+            {
+                "valid" when IsLicenseExpiringSoon() => "Warning",
+                "valid"                              => "Ok",
+                _                                    => "Error",
+            };
+        }
+    }
+
+    private bool IsLicenseExpiringSoon()
+    {
+        if (_license?.DownloadEntitlementUntil is not { } until) return false;
+        return (until - DateTime.UtcNow).TotalDays < 30;
+    }
+
+    private void NotifyLicenseChanged()
+    {
+        OnPropertyChanged(nameof(LicenseSummary));
+        OnPropertyChanged(nameof(LicenseIcon));
+        OnPropertyChanged(nameof(LicenseSeverity));
     }
 
     public string EmptyHint =>
@@ -257,7 +310,7 @@ public sealed partial class MainViewModel : ObservableObject
         {
             // Au retour, l'URL serveur ou l'installRoot ont pu changer → refresh
             _license = _licenseService.GetCached();
-            OnPropertyChanged(nameof(LicenseSummary));
+            NotifyLicenseChanged();
             RebuildList();
         }
     }
@@ -270,7 +323,7 @@ public sealed partial class MainViewModel : ObservableObject
         if (dialog.LicenseActivated)
         {
             _license = _licenseService.GetCached();
-            OnPropertyChanged(nameof(LicenseSummary));
+            NotifyLicenseChanged();
             RebuildList();
         }
         await Task.CompletedTask;

src/PSLauncher.App/Views/MainWindow.xaml

@@ -170,9 +170,69 @@
                             Content="📁  Dossier"
                             Command="{Binding OpenInstallRootCommand}"
                             Margin="0,0,12,0" />
+                    <!-- Badge license -->
+                    <Border CornerRadius="14" Padding="10,4"
+                            VerticalAlignment="Center" Margin="0,0,8,0">
+                        <Border.Style>
+                            <Style TargetType="Border">
+                                <!-- Default: error (rouge) -->
+                                <Setter Property="Background" Value="#2A1414" />
+                                <Setter Property="BorderBrush" Value="{StaticResource Brush.Status.AvailableBg}" />
+                                <Setter Property="BorderThickness" Value="1" />
+                                <Style.Triggers>
+                                    <DataTrigger Binding="{Binding LicenseSeverity}" Value="Ok">
+                                        <Setter Property="Background" Value="{StaticResource Brush.Status.InstalledBg}" />
+                                        <Setter Property="BorderBrush" Value="{StaticResource Brush.Status.Installed}" />
+                                    </DataTrigger>
+                                    <DataTrigger Binding="{Binding LicenseSeverity}" Value="Warning">
+                                        <Setter Property="Background" Value="{StaticResource Brush.Status.BusyBg}" />
+                                        <Setter Property="BorderBrush" Value="{StaticResource Brush.Status.Busy}" />
+                                    </DataTrigger>
+                                    <DataTrigger Binding="{Binding LicenseSeverity}" Value="Error">
+                                        <Setter Property="Background" Value="#2A1414" />
+                                        <Setter Property="BorderBrush" Value="#EF4444" />
+                                    </DataTrigger>
+                                </Style.Triggers>
+                            </Style>
+                        </Border.Style>
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock Text="{Binding LicenseIcon}"
+                                       FontSize="14" FontWeight="Bold"
+                                       VerticalAlignment="Center"
+                                       Margin="0,0,8,0">
+                                <TextBlock.Style>
+                                    <Style TargetType="TextBlock">
+                                        <Setter Property="Foreground" Value="#EF4444" />
+                                        <Style.Triggers>
+                                            <DataTrigger Binding="{Binding LicenseSeverity}" Value="Ok">
+                                                <Setter Property="Foreground" Value="{StaticResource Brush.Status.Installed}" />
+                                            </DataTrigger>
+                                            <DataTrigger Binding="{Binding LicenseSeverity}" Value="Warning">
+                                                <Setter Property="Foreground" Value="{StaticResource Brush.Status.Busy}" />
+                                            </DataTrigger>
+                                        </Style.Triggers>
+                                    </Style>
+                                </TextBlock.Style>
+                            </TextBlock>
                             <TextBlock Text="{Binding LicenseSummary}"
-                               Foreground="{StaticResource Brush.Text.Secondary}"
+                                       FontSize="12" FontWeight="SemiBold"
-                               VerticalAlignment="Center" Margin="0,0,8,0" />
+                                       VerticalAlignment="Center">
+                                <TextBlock.Style>
+                                    <Style TargetType="TextBlock">
+                                        <Setter Property="Foreground" Value="#FCA5A5" />
+                                        <Style.Triggers>
+                                            <DataTrigger Binding="{Binding LicenseSeverity}" Value="Ok">
+                                                <Setter Property="Foreground" Value="#86EFAC" />
+                                            </DataTrigger>
+                                            <DataTrigger Binding="{Binding LicenseSeverity}" Value="Warning">
+                                                <Setter Property="Foreground" Value="#FCD34D" />
+                                            </DataTrigger>
+                                        </Style.Triggers>
+                                    </Style>
+                                </TextBlock.Style>
+                            </TextBlock>
+                        </StackPanel>
+                    </Border>
                     <Button Style="{StaticResource SecondaryButton}"
                             Content="🔑  Activer / changer"
                             Command="{Binding ActivateLicenseCommand}"