Port shared layers to net8 and stabilize release workflow (#4453)

* Port shared layers to net8 and stabilize release workflow

- port non-UI core, interface, package engine, and test projects toward cross-platform net8 targets

- add the portable Avalonia solution and fix Windows x64 and arm64 solution targeting

- update versioning, integrity, and build scripts for the new PowerShell-based workflow

- repair release and test workflows, including manifest stamping and Node 24 action upgrades

* Restore Windows executable fallback path

Author: mamoreau-devolutions

.github/workflows/build-release.yml

@@ -36,7 +36,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Resolve build parameters
         id: info
@@ -98,7 +98,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install Windows SDK UAP platform
         shell: pwsh
@@ -119,7 +119,7 @@ jobs:
           dotnet-version: 8.0.x
 
       - name: Install Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.x'
 
@@ -149,7 +149,7 @@ jobs:
 
       - name: Restore WinGet CLI cache
         id: winget-cache
-        uses: actions/cache/restore@v4
+        uses: actions/cache/restore@v5
         with:
           path: src/UniGetUI.PackageEngine.Managers.WinGet/winget-cli_${{ matrix.platform }}
           key: winget-cli-${{ runner.os }}-${{ matrix.platform }}-${{ hashFiles('scripts/fetch-winget-cli.ps1') }}
@@ -165,32 +165,32 @@ jobs:
 
       - name: Save WinGet CLI cache
         if: steps.winget-cache.outputs.cache-hit != 'true'
-        uses: actions/cache/save@v4
+        uses: actions/cache/save@v5
         with:
           path: src/UniGetUI.PackageEngine.Managers.WinGet/winget-cli_${{ matrix.platform }}
           key: ${{ steps.winget-cache.outputs.cache-primary-key }}
 
       - name: Restore dependencies
         working-directory: src
-        run: dotnet restore
+        run: dotnet restore UniGetUI.sln
 
       - name: Run tests
         working-directory: src
         shell: pwsh
         run: |
           # Retry once to handle flaky tests (e.g. TaskRecyclerTests uses Random)
-          dotnet test --no-restore --verbosity q --nologo
+          dotnet test UniGetUI.sln --no-restore --verbosity q --nologo
           if ($LASTEXITCODE -ne 0) {
             Write-Host "::warning::First test run failed, retrying..."
-            dotnet test --no-restore --verbosity q --nologo
+            dotnet test UniGetUI.sln --no-restore --verbosity q --nologo
             if ($LASTEXITCODE -ne 0) { exit 1 }
           }
 
       - name: Publish
         shell: pwsh
         run: |
           $Platform = '${{ matrix.platform }}'
-          dotnet publish src/UniGetUI/UniGetUI.csproj /noLogo /p:Configuration=Release /p:Platform=$Platform -v m
+          dotnet publish src/UniGetUI/UniGetUI.csproj /noLogo /p:Configuration=Release /p:Platform=$Platform -p:RuntimeIdentifier=win-$Platform -v m
           if ($LASTEXITCODE -ne 0) { throw "dotnet publish failed" }
 
           # Stage binaries
@@ -276,7 +276,7 @@ jobs:
             -TimestampServer '${{ vars.CODE_SIGNING_TIMESTAMP_SERVER }}'
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: UniGetUI-release-${{ matrix.platform }}
           path: output/*
@@ -298,7 +298,7 @@ jobs:
 
     steps:
       - name: Download artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           path: output
 

.github/workflows/dotnet-test.yml

@@ -34,18 +34,31 @@ jobs:
       with:
         dotnet-version: 8.0.x
 
+    - name: Install Windows SDK UAP platform
+      shell: pwsh
+      run: |
+        # CsWinRT in WindowsPackageManager.Interop requires UAP 10.0.19041.0 platform metadata
+        $VsWhere = "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe"
+        $VsInstaller = "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vs_installer.exe"
+        $InstallPath = & $VsWhere -latest -property installationPath
+        & $VsInstaller modify --installPath $InstallPath `
+          --add Microsoft.VisualStudio.Component.UWP.Support `
+          --add Microsoft.VisualStudio.Component.Windows10SDK.19041 `
+          --quiet --norestart --nocache | Out-Default
+        Write-Host "Windows SDK UAP platform installed"
+
     # - name: Install WinGet
     #   uses: Cyberboss/install-winget@v1
 
     - name: Install dependencies
       working-directory: src
-      run: dotnet restore
+      run: dotnet restore UniGetUI.sln
 
     # - name: Test build
     #   working-directory: src
     #   run: dotnet build --configuration Release
 
     - name: Run Tests
       working-directory: src
-      run: dotnet test --no-restore --verbosity q --nologo
+      run: dotnet test UniGetUI.sln --no-restore --verbosity q --nologo
 

AGENTS.md

@@ -1,4 +1,4 @@
-# UniGetUI ΓÇô Copilot Instructions
+# UniGetUI - Copilot Instructions
 
 ## Project Overview
 
@@ -8,13 +8,13 @@ UniGetUI is a WinUI 3 desktop app (C#/.NET 8, Windows App SDK) providing a GUI f
 
 The codebase follows a **layered, modular structure** with ~40 projects:
 
-- **`UniGetUI/`** ΓÇô WinUI 3 entry point, XAML pages, controls, and app shell (`EntryPoint.cs`, `MainWindow.xaml`)
-- **`UniGetUI.Core.*`** ΓÇô Shared infrastructure: `Logger`, `Settings`, `Tools` (includes `CoreTools.Translate()`), `IconEngine`, `LanguageEngine`
-- **`UniGetUI.PackageEngine.Interfaces`** ΓÇô Contracts: `IPackageManager`, `IPackage`, `IManagerSource`, `IPackageDetails`
-- **`UniGetUI.PackageEngine.PackageManagerClasses`** ΓÇô Base implementations: `PackageManager` (abstract), `Package`, helpers (`BasePkgDetailsHelper`, `BasePkgOperationHelper`, `BaseSourceHelper`)
-- **`UniGetUI.PackageEngine.Managers.*`** ΓÇô Concrete manager implementations (one project per manager: `WinGet`, `Scoop`, `Chocolatey`, `Pip`, `Npm`, etc.)
-- **`UniGetUI.PackageEngine.Operations`** ΓÇô Install/update/uninstall operation orchestration
-- **`UniGetUI.Interface.*`** ΓÇô Enums, telemetry, background API
+- **`UniGetUI/`** - WinUI 3 entry point, XAML pages, controls, and app shell (`EntryPoint.cs`, `MainWindow.xaml`)
+- **`UniGetUI.Core.*`** - Shared infrastructure: `Logger`, `Settings`, `Tools` (includes `CoreTools.Translate()`), `IconEngine`, `LanguageEngine`
+- **`UniGetUI.PackageEngine.Interfaces`** - Contracts: `IPackageManager`, `IPackage`, `IManagerSource`, `IPackageDetails`
+- **`UniGetUI.PackageEngine.PackageManagerClasses`** - Base implementations: `PackageManager` (abstract), `Package`, helpers (`BasePkgDetailsHelper`, `BasePkgOperationHelper`, `BaseSourceHelper`)
+- **`UniGetUI.PackageEngine.Managers.*`** - Concrete manager implementations (one project per manager: `WinGet`, `Scoop`, `Chocolatey`, `Pip`, `Npm`, etc.)
+- **`UniGetUI.PackageEngine.Operations`** - Install/update/uninstall operation orchestration
+- **`UniGetUI.Interface.*`** - Enums, telemetry, background API
 
 ## Adding a New Package Manager
 
@@ -27,9 +27,9 @@ protected override IReadOnlyList<Package> GetInstalledPackages_UnSafe();
 ```
 
 Each manager also provides three helper classes (in a `Helpers/` subfolder):
-- `*PkgDetailsHelper` extends `BasePkgDetailsHelper` ΓÇô overrides `GetDetails_UnSafe`, `GetInstallableVersions_UnSafe`, `GetIcon_UnSafe`, etc.
-- `*PkgOperationHelper` extends `BasePkgOperationHelper` ΓÇô overrides `_getOperationParameters`, `_getOperationResult`
-- `*SourceHelper` extends `BaseSourceHelper` ΓÇô overrides `GetSources_UnSafe`, `GetAddSourceParameters`, etc.
+- `*PkgDetailsHelper` extends `BasePkgDetailsHelper` - overrides `GetDetails_UnSafe`, `GetInstallableVersions_UnSafe`, `GetIcon_UnSafe`, etc.
+- `*PkgOperationHelper` extends `BasePkgOperationHelper` - overrides `_getOperationParameters`, `_getOperationResult`
+- `*SourceHelper` extends `BaseSourceHelper` - overrides `GetSources_UnSafe`, `GetAddSourceParameters`, etc.
 
 The constructor sets `Capabilities`, `Properties`, and wires the helpers. See `src/UniGetUI.PackageEngine.Managers.Scoop/Scoop.cs` as a clean reference implementation.
 
@@ -42,13 +42,10 @@ dotnet test --verbosity q --nologo
 
 # Publish release build
 dotnet publish src/UniGetUI/UniGetUI.csproj /p:Configuration=Release /p:Platform=x64
-
-# Full release (runs version script, tests, publish, installer)
-build_release.cmd
 ```
 
 - Target framework: `net8.0-windows10.0.26100.0` (min `10.0.19041`)
-- Build generates secrets via `src/UniGetUI/Services/generate-secrets.ps1` and integrity tree via `scripts/generate_integrity_tree.py`
+- Build generates secrets via `src/UniGetUI/Services/generate-secrets.ps1` and integrity tree via `scripts/generate-integrity-tree.ps1`
 - Self-contained, publish-trimmed (partial), Windows App SDK self-contained
 - Tests use **xUnit** (`[Fact]`, `Assert.*`)
 
@@ -72,7 +69,7 @@ Use `CoreTools.Translate("text")` for all user-facing strings. Parameterized: `C
 
 ### Manager conventions
 - `FALSE_PACKAGE_NAMES`, `FALSE_PACKAGE_IDS`, `FALSE_PACKAGE_VERSIONS` static arrays filter CLI parsing noise
-- Manager initialization flows through `Initialize()` → `_loadManagerExecutableFile()` → `_loadManagerVersion()` → `_performExtraLoadingSteps()`
+- Manager initialization flows through `Initialize()` -> `_loadManagerExecutableFile()` -> `_loadManagerVersion()` -> `_performExtraLoadingSteps()`
 - Operations that may fail return `OperationVeredict` (note: intentional misspelling used throughout codebase)
 
 ## Key Files