i18n: full pass + culture-aware dates/sizes + Software Update License wording

- Strings.cs : ~80 new keys covering status messages, progress detail
  (DL/extraction/verify), license summary, license details dialog, onboarding
  statuses, settings field labels, restart/cancel/quit confirmations, toasts,
  resume choice, copyright. Strings.FormatSize and Strings.FormatDate /
  FormatLongDate switch units (o/Ko vs B/KB) and pattern (dd/MM/yyyy vs M/d/yyyy
  vs 2026年) by active language.
- License terminology renamed across UI: "License" → "License de mise à jour"
  / "Software Update License" to clarify it gates UPDATES, not Proserve itself.
  Expired/revoked dialogs now spell out "you can still download versions
  released before this date and launch any installed version".
- "🔒 License insuffisante" → "🔒 License de mise à jour requise pour cette
  version" / "Valid update license needed for this version" so users understand
  it's a per-version eligibility check, not a global block.
- All hardcoded FR strings in views (SettingsDialog labels, LicenseDetails
  fields, Onboarding statuses, dialog titles, copyright, window chrome
  tooltips, "Sortie le", etc.) replaced with x:Static loc bindings.
- All FormatSize duplicates (5 places) and date format strings (8 places)
  delegate to Strings helpers — single source of truth for localization.
- Settings dialog: License section moved to the top before Language. It's
  the most important info and conditions what the user can download.

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

src/PSLauncher.App/Views/LicenseDetailsDialog.xaml

@@ -1,6 +1,7 @@
 <Window x:Class="PSLauncher.App.Views.LicenseDetailsDialog"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:loc="clr-namespace:PSLauncher.Core.Localization;assembly=PSLauncher.Core"
         Title="License"
         Icon="pack://application:,,,/Resources/favicon.ico"
         Width="500" Height="480"
@@ -45,7 +46,7 @@
                         <ColumnDefinition Width="160" />
                         <ColumnDefinition Width="*" />
                     </Grid.ColumnDefinitions>
-                    <TextBlock Grid.Column="0" Text="Client"
+                    <TextBlock Grid.Column="0" Text="{x:Static loc:Strings.LicenseDetailsClient}"
                                Foreground="{StaticResource Brush.Text.Secondary}" FontSize="12" />
                     <TextBlock Grid.Column="1" x:Name="OwnerText"
                                FontWeight="SemiBold"
@@ -56,7 +57,7 @@
                         <ColumnDefinition Width="160" />
                         <ColumnDefinition Width="*" />
                     </Grid.ColumnDefinitions>
-                    <TextBlock Grid.Column="0" Text="Validité téléchargements"
+                    <TextBlock Grid.Column="0" Text="{x:Static loc:Strings.LicenseDetailsValidity}"
                                Foreground="{StaticResource Brush.Text.Secondary}" FontSize="12" />
                     <TextBlock Grid.Column="1" x:Name="UntilText"
                                FontWeight="SemiBold"
@@ -67,7 +68,7 @@
                         <ColumnDefinition Width="160" />
                         <ColumnDefinition Width="*" />
                     </Grid.ColumnDefinitions>
-                    <TextBlock Grid.Column="0" Text="Activée le"
+                    <TextBlock Grid.Column="0" Text="{x:Static loc:Strings.LicenseDetailsActivatedOn}"
                                Foreground="{StaticResource Brush.Text.Secondary}" FontSize="12" />
                     <TextBlock Grid.Column="1" x:Name="IssuedText"
                                Foreground="{StaticResource Brush.Text.Primary}" />
@@ -77,7 +78,7 @@
                         <ColumnDefinition Width="160" />
                         <ColumnDefinition Width="*" />
                     </Grid.ColumnDefinitions>
-                    <TextBlock Grid.Column="0" Text="ID machine"
+                    <TextBlock Grid.Column="0" Text="{x:Static loc:Strings.LicenseDetailsMachineId}"
                                Foreground="{StaticResource Brush.Text.Secondary}" FontSize="12"
                                VerticalAlignment="Center" />
                     <Grid Grid.Column="1">
@@ -91,7 +92,7 @@
                                    TextTrimming="CharacterEllipsis" VerticalAlignment="Center" />
                         <Button Grid.Column="1" Style="{StaticResource SecondaryButton}"
                                 Content="📋"
-                                ToolTip="Copier"
+                                ToolTip="{x:Static loc:Strings.CopyTooltip}"
                                 Click="OnCopyMachineId" />
                     </Grid>
                 </Grid>
@@ -101,11 +102,11 @@
         <!-- Footer actions -->
         <StackPanel Grid.Row="3" Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,18,0,0">
             <Button Style="{StaticResource SecondaryButton}"
-                    Content="🗑  Désactiver la license"
+                    Content="{x:Static loc:Strings.LicenseDetailsDeactivate}"
                     Click="OnDeactivate"
                     Margin="0,0,12,0" />
             <Button Style="{StaticResource AccentButton}"
-                    Content="Fermer"
+                    Content="{x:Static loc:Strings.ActionClose}"
                     IsCancel="True" IsDefault="True"
                     Padding="32,8"
                     Click="OnClose" />