Fix Avalonia generator hooks

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: mamoreau-devolutions

src/UniGetUI.Avalonia/ViewModels/DialogPages/InstallOptionsViewModel.cs

@@ -137,9 +137,9 @@ partial void OnSelectedProfileChanged(string? value)
     [ObservableProperty] private string _paramsUpdate = "";
     [ObservableProperty] private string _paramsUninstall = "";
 
-    partial void OnParamsInstallChanged(string _) => Refresh();
-    partial void OnParamsUpdateChanged(string _) => Refresh();
-    partial void OnParamsUninstallChanged(string _) => Refresh();
+    partial void OnParamsInstallChanged(string value) => Refresh();
+    partial void OnParamsUpdateChanged(string value) => Refresh();
+    partial void OnParamsUninstallChanged(string value) => Refresh();
 
     // ── Pre/Post commands tab ─────────────────────────────────────────────────
     [ObservableProperty] private string _preInstallText = "";

src/UniGetUI.Avalonia/ViewModels/Pages/SettingsPages/InstallOptionsPanelViewModel.cs

@@ -97,13 +97,13 @@ public partial class InstallOptionsPanelViewModel : ViewModelBase
     partial void OnLocationSelectEnabledChanged(bool value) => OnPropertyChanged(nameof(LocationOpacity));
 
     // Mark HasChanges when user edits options (guards against firing during load)
-    partial void OnAdminCheckedChanged(bool _) => HasChanges = !IsLoading;
-    partial void OnInteractiveCheckedChanged(bool _) => HasChanges = !IsLoading;
-    partial void OnSkipHashCheckedChanged(bool _) => HasChanges = !IsLoading;
-    partial void OnPreReleaseCheckedChanged(bool _) => HasChanges = !IsLoading;
-    partial void OnUninstallPreviousCheckedChanged(bool _) => HasChanges = !IsLoading;
-    partial void OnSelectedArchitectureChanged(string? _) => HasChanges = !IsLoading;
-    partial void OnSelectedScopeChanged(string? _) => HasChanges = !IsLoading;
+    partial void OnAdminCheckedChanged(bool value) => HasChanges = !IsLoading;
+    partial void OnInteractiveCheckedChanged(bool value) => HasChanges = !IsLoading;
+    partial void OnSkipHashCheckedChanged(bool value) => HasChanges = !IsLoading;
+    partial void OnPreReleaseCheckedChanged(bool value) => HasChanges = !IsLoading;
+    partial void OnUninstallPreviousCheckedChanged(bool value) => HasChanges = !IsLoading;
+    partial void OnSelectedArchitectureChanged(string? value) => HasChanges = !IsLoading;
+    partial void OnSelectedScopeChanged(string? value) => HasChanges = !IsLoading;
 
     public InstallOptionsPanelViewModel(IPackageManager manager)
     {

src/UniGetUI.Avalonia/ViewModels/SoftwarePages/PackagesPageViewModel.cs

@@ -91,7 +91,7 @@ public bool IsExpanded
 public partial class PackagesPageViewModel : ViewModelBase
 {
     public double FilterPaneColumnWidth => IsFilterPaneOpen ? 220.0 : 0.0;
-    partial void OnIsFilterPaneOpenChanged(bool _) => OnPropertyChanged(nameof(FilterPaneColumnWidth));
+    partial void OnIsFilterPaneOpenChanged(bool value) => OnPropertyChanged(nameof(FilterPaneColumnWidth));
 
     // ─── Static config (set once in constructor) ──────────────────────────────
     public readonly string PageName;