Signed release pipeline (macOS/Windows/Linux/Web); README community note

Ports photocraft's release workflow + packaging (signing, notarization,
MSI/DMG/deb/rpm/AppImage/web), adds `cargo xtask version`. File-type
associations omitted for now (route B); app keeps its own .desktop. Fresh
WiX UpgradeCode. README 'about' note updated.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

.github/workflows/packaging-lint.yml

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+# Quick static checks for the release pipeline (seconds, no Rust build): workflow syntax,
+# packaging shell/PowerShell scripts, and the Linux desktop/AppStream/Flatpak metadata.
+name: Packaging lint
+
+on:
+  push:
+    branches: [main, release]
+    paths: [".github/workflows/**", "packaging/**", "assets/app-icon/**"]
+  pull_request:
+    paths: [".github/workflows/**", "packaging/**", "assets/app-icon/**"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: packaging-lint-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    env:
+      ACTIONLINT_VERSION: 1.7.12
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install tools
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends shellcheck desktop-file-utils appstream libxml2-utils python3-yaml
+          curl -fsSL "https://github.com/rhysd/actionlint/releases/download/v${ACTIONLINT_VERSION}/actionlint_${ACTIONLINT_VERSION}_linux_amd64.tar.gz" \
+            | tar -xz -C "$RUNNER_TEMP" actionlint
+      - name: actionlint
+        run: |
+          "$RUNNER_TEMP/actionlint" -color
+      - name: shellcheck
+        run: shellcheck packaging/*.sh packaging/*/*.sh
+      - name: PowerShell
+        shell: pwsh
+        run: |
+          foreach ($f in Get-ChildItem packaging/windows/*.ps1) {
+            $errors = $null
+            [System.Management.Automation.Language.Parser]::ParseFile($f.FullName, [ref]$null, [ref]$errors) | Out-Null
+            if ($errors) { $errors | ForEach-Object { Write-Output "::error file=$($f.Name)::$_" }; exit 1 }
+            Write-Output "ok $($f.Name)"
+          }
+      - name: XML, desktop entry, AppStream, Flatpak manifest
+        run: |
+          xmllint --noout packaging/windows/vectorcraft.wxs packaging/macos/*.plist* packaging/linux/*.xml*
+          desktop-file-validate packaging/linux/ai.storyteller.vectorcraft.desktop
+          sed -e 's/@VERSION@/0.0.0/' -e 's/@DATE@/2026-01-01/' packaging/linux/ai.storyteller.vectorcraft.metainfo.xml.in >"$RUNNER_TEMP/ai.storyteller.vectorcraft.metainfo.xml"
+          appstreamcli validate --no-net --explain "$RUNNER_TEMP/ai.storyteller.vectorcraft.metainfo.xml"
+          python3 -c "import yaml; m = yaml.safe_load(open('packaging/linux/flatpak/ai.storyteller.vectorcraft.yml')); assert m['id'] == 'ai.storyteller.vectorcraft' and m['command'] == 'vectorcraft'"

.github/workflows/release.yml

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+# Release pipeline: every push to `release` builds signed installers for every platform and
+# creates or updates the draft GitHub Release "VectorCraft v<version>". See docs/releasing.md.
+#
+# All jobs run in the `release` environment (restricted to the `release` branch), which holds
+# the signing secrets. Every secret is optional: missing ones produce unsigned artifacts and a
+# warning, never a failed build.
+name: Release
+
+on:
+  push:
+    branches: [release]
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "Version override for a test run, e.g. 0.2.0-rc.1 (empty: Cargo.toml)"
+        type: string
+        default: ""
+
+permissions:
+  contents: read
+
+concurrency:
+  group: release-${{ github.ref }}
+  # Never cancel a run mid-notarization or mid-upload; a newer push waits its turn.
+  cancel-in-progress: false
+
+env:
+  CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: 0
+  RUST_BACKTRACE: 1
+  VECTORCRAFT_BUILD_SHA: ${{ github.sha }}
+  INPUT_VERSION: ${{ inputs.version }}
+
+jobs:
+  version:
+    name: version
+    runs-on: ubuntu-latest
+    environment: release
+    outputs:
+      version: ${{ steps.v.outputs.version }}
+      date: ${{ steps.v.outputs.date }}
+      prerelease: ${{ steps.v.outputs.prerelease }}
+    steps:
+      - uses: actions/checkout@v4
+      - id: v
+        name: Resolve version
+        run: |
+          . packaging/env.sh
+          v="${INPUT_VERSION#v}"
+          v="${v:-$VERSION}"
+          if ! printf '%s' "$v" | grep -Eq '^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$'; then
+            echo "::error::'$v' is not a version like 1.2.3 or 1.2.3-rc.1"
+            exit 1
+          fi
+          case "$v" in *-*) pre=true ;; *) pre=false ;; esac
+          {
+            echo "version=$v"
+            echo "date=$(date -u +%Y-%m-%d)"
+            echo "prerelease=$pre"
+          } >>"$GITHUB_OUTPUT"
+          echo "### VectorCraft v$v (\`${GITHUB_SHA::9}\`)" >>"$GITHUB_STEP_SUMMARY"
+
+  macos:
+    name: macOS universal
+    needs: version
+    runs-on: macos-15
+    environment: release
+    env:
+      VECTORCRAFT_VERSION: ${{ needs.version.outputs.version }}
+      VECTORCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: aarch64-apple-darwin, x86_64-apple-darwin
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: release-macos-universal
+      - name: Apply version override
+        if: inputs.version != ''
+        run: cargo xtask version set "$VECTORCRAFT_VERSION"
+      - name: Import signing certificate
+        env:
+          APPLE_CERTIFICATE: ${{ secrets.APPLE_CERTIFICATE }}
+          APPLE_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
+          KEYCHAIN_PASSWORD: ${{ secrets.KEYCHAIN_PASSWORD }}
+        run: packaging/macos/import-cert.sh
+      - name: Build, sign, notarize
+        env:
+          APPLE_ID: ${{ secrets.APPLE_ID }}
+          APPLE_PASSWORD: ${{ secrets.APPLE_PASSWORD }}
+          APPLE_TEAM_ID: ${{ secrets.APPLE_TEAM_ID }}
+        run: packaging/macos/package.sh --arch universal
+      - uses: actions/upload-artifact@v4
+        with:
+          name: release-macos
+          path: dist/release/*
+          if-no-files-found: error
+      - name: Remove temporary keychain
+        if: always()
+        run: |
+          if [ -n "${MACOS_KEYCHAIN:-}" ]; then security delete-keychain "$MACOS_KEYCHAIN" || true; fi
+
+  windows:
+    name: Windows ${{ matrix.arch }}
+    needs: version
+    runs-on: windows-latest
+    environment: release
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { arch: x64, target: x86_64-pc-windows-msvc }
+          - { arch: x86, target: i686-pc-windows-msvc }
+    env:
+      VECTORCRAFT_VERSION: ${{ needs.version.outputs.version }}
+      VECTORCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: release-windows-${{ matrix.arch }}
+      - name: Apply version override
+        if: inputs.version != ''
+        shell: bash
+        run: cargo xtask version set "$VECTORCRAFT_VERSION"
+      - name: Install WiX
+        shell: pwsh
+        run: dotnet tool install --global wix --version 5.0.2
+      - name: Build, sign, package
+        shell: pwsh
+        env:
+          WINDOWS_CERTIFICATE: ${{ secrets.WINDOWS_CERTIFICATE }}
+          WINDOWS_CERTIFICATE_PASSWORD: ${{ secrets.WINDOWS_CERTIFICATE_PASSWORD }}
+          AZURE_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
+          AZURE_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
+          AZURE_CLIENT_SECRET: ${{ secrets.AZURE_CLIENT_SECRET }}
+          AZURE_SIGNING_ENDPOINT: ${{ secrets.AZURE_SIGNING_ENDPOINT }}
+          AZURE_SIGNING_ACCOUNT: ${{ secrets.AZURE_SIGNING_ACCOUNT }}
+          AZURE_CERT_PROFILE: ${{ secrets.AZURE_CERT_PROFILE }}
+        run: ./packaging/windows/package.ps1 -Arch ${{ matrix.arch }}
+      - uses: actions/upload-artifact@v4
+        with:
+          name: release-windows-${{ matrix.arch }}
+          path: dist/release/*
+          if-no-files-found: error
+
+  linux:
+    name: Linux ${{ matrix.arch }}
+    needs: version
+    # The oldest GitHub-hosted image, so the binaries only need glibc >= 2.35 (Ubuntu 22.04+,
+    # Debian 12+, Fedora 36+, RHEL 10). See docs/releasing.md.
+    runs-on: ${{ matrix.runner }}
+    environment: release
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { arch: x86_64, runner: ubuntu-22.04, deb: amd64 }
+          - { arch: aarch64, runner: ubuntu-22.04-arm, deb: arm64 }
+    env:
+      VECTORCRAFT_VERSION: ${{ needs.version.outputs.version }}
+      VECTORCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
+      NFPM_VERSION: 2.47.0
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install build and packaging tools
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            libxkbcommon-dev libwayland-dev libx11-dev libxrandr-dev libxi-dev libgl1-mesa-dev \
+            desktop-file-utils appstream python3-yaml
+          curl -fsSL -o "$RUNNER_TEMP/nfpm.deb" \
+            "https://github.com/goreleaser/nfpm/releases/download/v${NFPM_VERSION}/nfpm_${NFPM_VERSION}_${{ matrix.deb }}.deb"
+          sudo dpkg -i "$RUNNER_TEMP/nfpm.deb"
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: release-linux-${{ matrix.arch }}
+      - name: Apply version override
+        if: inputs.version != ''
+        run: cargo xtask version set "$VECTORCRAFT_VERSION"
+      - name: Build and package (AppImage, deb, rpm, tar.gz)
+        run: packaging/linux/package.sh
+      - name: Check the packages
+        run: |
+          dpkg-deb --info dist/release/*.deb
+          dpkg-deb --contents dist/release/*.deb | grep -E 'usr/bin/vectorcraft$|metainfo|applications'
+          ldd target/release/vectorcraft
+          python3 -c "import yaml; m = yaml.safe_load(open('packaging/linux/flatpak/ai.storyteller.vectorcraft.yml')); assert m['id'] == 'ai.storyteller.vectorcraft'"
+          for appimage in dist/release/*.AppImage; do
+            chmod +x "$appimage"
+            APPIMAGE_EXTRACT_AND_RUN=1 "$appimage" --version
+          done
+      - uses: actions/upload-artifact@v4
+        with:
+          name: release-linux-${{ matrix.arch }}
+          path: dist/release/*
+          if-no-files-found: error
+
+  web:
+    name: Web (wasm)
+    needs: version
+    runs-on: ubuntu-latest
+    environment: release
+    env:
+      VECTORCRAFT_VERSION: ${{ needs.version.outputs.version }}
+      VECTORCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
+      TRUNK_VERSION: 0.21.14
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: wasm32-unknown-unknown
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: release-web
+      - name: Install trunk
+        run: |
+          curl -fsSL "https://github.com/trunk-rs/trunk/releases/download/v${TRUNK_VERSION}/trunk-x86_64-unknown-linux-gnu.tar.gz" \
+            | tar -xz -C "$HOME/.cargo/bin" trunk
+          trunk --version
+      - name: Apply version override
+        if: inputs.version != ''
+        run: cargo xtask version set "$VECTORCRAFT_VERSION"
+      - name: Build and zip
+        run: packaging/web/package.sh
+      - uses: actions/upload-artifact@v4
+        with:
+          name: release-web
+          path: dist/release/*
+          if-no-files-found: error
+
+  release:
+    name: Draft GitHub Release
+    needs: [version, macos, windows, linux, web]
+    runs-on: ubuntu-latest
+    environment: release
+    permissions:
+      contents: write
+    env:
+      VERSION: ${{ needs.version.outputs.version }}
+      PRERELEASE: ${{ needs.version.outputs.prerelease }}
+      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      GH_REPO: ${{ github.repository }}
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          pattern: release-*
+          path: artifacts
+          merge-multiple: true
+      - name: Checksums
+        working-directory: artifacts
+        run: |
+          sha256sum -- * | tee SHA256SUMS.txt
+      - name: Create or update the draft release
+        working-directory: artifacts
+        run: |
+          tag="v$VERSION"
+          title="VectorCraft v$VERSION"
+          pre=()
+          if [ "$PRERELEASE" = true ]; then pre=(--prerelease); fi
+          if draft="$(gh release view "$tag" --json isDraft --jq .isDraft 2>/dev/null)"; then
+            if [ "$draft" != "true" ]; then
+              echo "::error::Release $tag is already published. Bump the version (cargo xtask version set) before pushing to release."
+              exit 1
+            fi
+            echo "Updating draft $tag: replacing its assets"
+            gh release view "$tag" --json assets --jq '.assets[].name' | while read -r asset; do
+              gh release delete-asset "$tag" "$asset" --yes
+            done
+            gh release edit "$tag" --draft --title "$title" --target "$GITHUB_SHA" --prerelease="$PRERELEASE"
+            gh release upload "$tag" --clobber -- *
+          else
+            echo "Creating draft $tag"
+            gh release create "$tag" --draft --title "$title" --target "$GITHUB_SHA" --generate-notes "${pre[@]}" -- *
+          fi
+          {
+            echo "Draft release **$title** at \`${GITHUB_SHA::9}\`:"
+            echo
+            sed 's/^/    /' SHA256SUMS.txt
+          } >>"$GITHUB_STEP_SUMMARY"