chore(deps): nuget updates

.editorconfig

@@ -560,6 +560,9 @@ dotnet_diagnostic.S6602.severity = none           	# "Find" method should be use
 dotnet_diagnostic.S6603.severity = none            	# The collection-specific "TrueForAll" method should be used instead of the "All"
 dotnet_diagnostic.S6605.severity = none             # Collection-specific "Exists" method should be used instead of the "Any"
 dotnet_diagnostic.S6964.severity = none             # Value type property used as input in a controller action should be nullable, required or annotated with the JsonRequiredAttribute to avoid under-posting.
+dotnet_diagnostic.S8969.severity = none             # Remove this null-forgiving operator; the compiler already knows this expression is not null here
+dotnet_diagnostic.S8970.severity = none             # Remove this null-forgiving operator; nullable warnings are disabled here
+
 
 ##########################################
 # Custom - File Extension Settings

.github/workflows/build.yml

@@ -0,0 +1,63 @@
+name: "Build and test"
+
+on:
+  push:
+    branches:
+      - main
+    tags-ignore:
+      - '**'
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  dotnet-build:
+    runs-on: windows-latest
+    steps:
+      - name: 🛒 Checkout repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          fetch-depth: 0
+
+      - name: ⚙️ Setup .NET
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
+        with:
+          dotnet-version: '10.0.x'
+
+      - name: 🔁 Restore packages
+        run: dotnet restore Atc.Wpf.slnx
+
+      - name: 🛠️ Build solution
+        run: dotnet build Atc.Wpf.slnx -c Release --no-restore
+
+  dotnet-test:
+    runs-on: windows-latest
+    needs: dotnet-build
+    steps:
+      - name: 🛒 Checkout repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          fetch-depth: 0
+
+      - name: ⚙️ Setup .NET
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
+        with:
+          dotnet-version: '10.0.x'
+
+      - name: 🔁 Restore packages
+        run: dotnet restore Atc.Wpf.slnx
+
+      - name: 🛠️ Build solution
+        run: dotnet build Atc.Wpf.slnx -c Release --no-restore /p:UseSourceLink=true
+
+      - name: 🧪 Run unit tests with code coverage
+        run: dotnet test --solution Atc.Wpf.slnx -c Release --no-build --coverage --coverage-output-format cobertura
+
+      - name: 📤 Upload coverage reports as workflow artifacts
+        if: ${{ !cancelled() }}
+        uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
+        with:
+          name: coverage-cobertura
+          path: '**/TestResults/**/*.cobertura.xml'
+          if-no-files-found: warn
+          retention-days: 14

.github/workflows/release-please.yml

@@ -0,0 +1,65 @@
+name: release-please
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  release-please:
+    # WPF targets Windows, so the packages must be built on a Windows runner.
+    runs-on: windows-latest
+    permissions:
+      contents: read
+      id-token: write  # required for NuGet Trusted Publishing (OIDC)
+
+    steps:
+      - name: release-please
+        id: release
+        uses: googleapis/release-please-action@45996ed1f6d02564a971a2fa1b5860e934307cf7 # v5.0.0
+        with:
+          token: ${{ secrets.RELEASE_PLEASE_PAT }}
+
+      - name: 🛒 Checkout repository
+        if: ${{ steps.release.outputs.release_created }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          fetch-depth: 0
+          ref: ${{ steps.release.outputs.tag_name }}
+
+      - name: ⚙️ Setup .NET
+        if: ${{ steps.release.outputs.release_created }}
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
+        with:
+          dotnet-version: '10.0.x'
+
+      - name: 🧹 Clean
+        if: ${{ steps.release.outputs.release_created }}
+        run: dotnet clean Atc.Wpf.slnx -c Release && dotnet nuget locals all --clear
+
+      - name: 🔁 Restore packages
+        if: ${{ steps.release.outputs.release_created }}
+        run: dotnet restore Atc.Wpf.slnx
+
+      - name: 🛠️ Build solution
+        if: ${{ steps.release.outputs.release_created }}
+        run: dotnet build Atc.Wpf.slnx -c Release --no-restore /p:UseSourceLink=true
+
+      # All packages share a single <Version> in Directory.Build.props, so they are
+      # always packed and published together from one release-please tag.
+      # Only projects with IsPackable=true (the ten src libraries) produce a package.
+      # On Windows, dotnet nuget push only expands the wildcard in a path that uses backslashes.
+      - name: 🗳️ Creating library packages for release
+        if: ${{ steps.release.outputs.release_created }}
+        run: dotnet pack Atc.Wpf.slnx -c Release --no-restore -o "${{ github.workspace }}\packages"
+
+      - name: 🔑 NuGet login (OIDC → short-lived API key)
+        if: ${{ steps.release.outputs.release_created }}
+        id: nuget-login
+        uses: NuGet/login@8d196754b4036150537f80ac539e15c2f1028841 # v1.2.0
+        with:
+          user: ${{ secrets.NUGET_USER }}
+
+      - name: 📦 Push packages to NuGet
+        if: ${{ steps.release.outputs.release_created }}
+        run: dotnet nuget push "${{ github.workspace }}\packages\*.nupkg" -k "${{ steps.nuget-login.outputs.NUGET_API_KEY }}" -s https://api.nuget.org/v3/index.json --skip-duplicate --no-symbols

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "4.0.215"
+}

CHANGELOG.md

@@ -2,10 +2,9 @@
 
 All notable changes to this project will be documented in this file.
 
-The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
-and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+From 4.0.216 onwards this file is maintained by [release-please](https://github.com/googleapis/release-please) from [Conventional Commits](https://www.conventionalcommits.org/), and the project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## 4.0.215 (2026-05-12)
 
 ### Added
 
@@ -560,5 +559,3 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   `StepperStepChangedEventArgsTests`, `StepperStepChangingEventArgsTests`
   (`Cancel` defaults to false + setter), `SegmentedSelectionChangedEventArgsTests`
   (null items allowed + index pair).
-
-[Unreleased]: https://github.com/atc-net/atc-wpf/compare/HEAD