branding: ASTERION VR favicon + copyright everywhere

Icon
----
src/favicon64.jpg converted to favicon.ico (single-resolution 64x64)
via PowerShell + System.Drawing.Icon.FromHandle. The .ico is now an
EmbeddedResource of PSLauncher.App and referenced as:
- <ApplicationIcon> on PSLauncher.App.csproj → .exe icon in
  Explorer / taskbar / Alt-Tab
- Window.Icon on every WPF window: MainWindow, SettingsDialog,
  OnboardingDialog, LicenseDetailsDialog, UpdateAvailableDialog,
  ReleaseNotesViewerDialog, LauncherUpdateDialog
- <ApplicationIcon> on PSLauncher.Updater.csproj → updater also
  carries the brand icon
- SetupIconFile in installer/PSLauncher.iss → the Inno Setup .exe
  installer shows the icon too

Copyright
---------
- <Company>, <Product>, <Copyright> assembly attributes set in
  both csprojs → properties dialog on the .exe shows "© ASTERION VR".
- MainWindow body has a discreet floating "© ASTERION VR" text in the
  bottom-right, mirroring the "Vérifier les MAJ" button on the left.
  Opacity 0.7 + secondary color so it doesn't compete with the cards.
- SettingsDialog "Logs & Application" section gains a
  "© ASTERION VR — Tous droits réservés" line under the version.

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

src/PSLauncher.App/PSLauncher.App.csproj

@@ -9,8 +9,11 @@
     <Nullable>enable</Nullable>
     <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
-    <ApplicationIcon></ApplicationIcon>
+    <ApplicationIcon>Resources\favicon.ico</ApplicationIcon>
     <AssemblyName>PSLauncher</AssemblyName>
+    <Company>ASTERION VR</Company>
+    <Product>PROSERVE Launcher</Product>
+    <Copyright>© ASTERION VR</Copyright>
     <RootNamespace>PSLauncher.App</RootNamespace>
     <Version>0.7.0</Version>
     <AssemblyVersion>0.7.0.0</AssemblyVersion>
@@ -47,6 +50,7 @@
   <ItemGroup>
     <Resource Include="Resources\Background.png" />
     <Resource Include="Resources\pirulen.otf" />
+    <Resource Include="Resources\favicon.ico" />
   </ItemGroup>
 
   <!-- Après chaque `dotnet publish -c Release`, copie le single-file exe à la racine du repo

src/PSLauncher.App/Views/LauncherUpdateDialog.xaml

@@ -2,6 +2,7 @@
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         Title="Mise à jour du launcher"
+        Icon="pack://application:,,,/Resources/favicon.ico"
         Width="500" Height="320"
         ResizeMode="NoResize"
         WindowStartupLocation="CenterOwner"

src/PSLauncher.App/Views/LicenseDetailsDialog.xaml

@@ -2,6 +2,7 @@
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         Title="License"
+        Icon="pack://application:,,,/Resources/favicon.ico"
         Width="500" Height="480"
         ResizeMode="NoResize"
         WindowStartupLocation="CenterOwner"

src/PSLauncher.App/Views/MainWindow.xaml

@@ -4,6 +4,7 @@
         xmlns:vm="clr-namespace:PSLauncher.App.ViewModels"
         xmlns:shell="clr-namespace:System.Windows.Shell;assembly=PresentationFramework"
         Title="PROSERVE Launcher"
+        Icon="pack://application:,,,/Resources/favicon.ico"
         Background="Black"
         Width="1280" Height="720"
         MinWidth="980" MinHeight="600"
@@ -494,6 +495,14 @@
                     Style="{StaticResource SecondaryButton}"
                     Content="🔄  Vérifier les MAJ"
                     Command="{Binding CheckForUpdatesCommand}" />
+
+            <!-- Copyright flottant en bas-droite, discret -->
+            <TextBlock HorizontalAlignment="Right" VerticalAlignment="Bottom"
+                       Margin="0,0,32,28"
+                       Text="© ASTERION VR"
+                       FontSize="11"
+                       Foreground="{StaticResource Brush.Text.Secondary}"
+                       Opacity="0.7" />
         </Grid>
 
         <!-- Footer : visible uniquement quand busy / status à afficher.

src/PSLauncher.App/Views/OnboardingDialog.xaml

@@ -2,6 +2,7 @@
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         Title="Activation PROSERVE Launcher"
+        Icon="pack://application:,,,/Resources/favicon.ico"
         Width="540" Height="420"
         MinWidth="480" MinHeight="380"
         WindowStartupLocation="CenterOwner"

src/PSLauncher.App/Views/ReleaseNotesViewerDialog.xaml

@@ -2,6 +2,7 @@
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         Title="Notes de version"
+        Icon="pack://application:,,,/Resources/favicon.ico"
         Width="640" Height="540"
         MinWidth="480" MinHeight="400"
         WindowStartupLocation="CenterOwner"

src/PSLauncher.App/Views/SettingsDialog.xaml

@@ -3,6 +3,7 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:vm="clr-namespace:PSLauncher.App.ViewModels"
         Title="Paramètres"
+        Icon="pack://application:,,,/Resources/favicon.ico"
         Width="640" Height="720"
         MinWidth="540" MinHeight="500"
         WindowStartupLocation="CenterOwner"
@@ -234,6 +235,10 @@
                             <Run Text="Version : " />
                             <Run Text="{Binding LauncherVersion, Mode=OneWay}" FontWeight="SemiBold" />
                         </TextBlock>
+                        <TextBlock Text="© ASTERION VR — Tous droits réservés"
+                                   FontSize="12"
+                                   Foreground="{StaticResource Brush.Text.Secondary}"
+                                   Margin="0,4,0,0" />
                         <Grid Margin="0,8,0,0">
                             <Grid.ColumnDefinitions>
                                 <ColumnDefinition Width="*" />

src/PSLauncher.App/Views/UpdateAvailableDialog.xaml

@@ -2,6 +2,7 @@
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         Title="Mise à jour disponible"
+        Icon="pack://application:,,,/Resources/favicon.ico"
         Width="640" Height="540"
         MinWidth="480" MinHeight="400"
         WindowStartupLocation="CenterOwner"

src/PSLauncher.Updater/PSLauncher.Updater.csproj

@@ -9,6 +9,9 @@
     <AssemblyName>PSLauncher.Updater</AssemblyName>
     <RootNamespace>PSLauncher.Updater</RootNamespace>
     <Version>0.5.0</Version>
+    <ApplicationIcon>..\PSLauncher.App\Resources\favicon.ico</ApplicationIcon>
+    <Company>ASTERION VR</Company>
+    <Copyright>© ASTERION VR</Copyright>
 
     <!-- Single-file self-contained pour le publish (~10 Mo) -->
     <PublishSingleFile>true</PublishSingleFile>