feat: GitHub Actions Windows release workflow (tag-triggered only)

- .github/workflows/release.yml: triggered on git push tag v*
  - Windows Server 2022 with MSYS2 + GTK4
  - Downloads latest Zig master
  - zig build → packages exe + DLLs + assets into zip
  - Creates GitHub Release with portable zip
- scripts/publish.sh: simplified — just pushes a tag, GH Actions
  handles the rest
- No CI on every commit — release only, on tag push, free tier

Publish a release:
  bash scripts/publish.sh
  # pushes tag → GitHub builds → release appears
  # https://github.com/4cecoder/metanoia/releases

Author: github-actions[bot]

.github/workflows/release.yml

@@ -0,0 +1,60 @@
+name: release
+
+on:
+  push:
+    tags: ["v*"]
+
+jobs:
+  build:
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: msys2 {0}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup MSYS2
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: UCRT64
+          update: true
+          install: >
+            mingw-w64-ucrt-x86_64-gtk4
+            mingw-w64-ucrt-x86_64-pkg-config
+            mingw-w64-ucrt-x86_64-sqlite3
+            mingw-w64-ucrt-x86_64-curl
+            mingw-w64-ucrt-x86_64-nsis
+
+      - name: Install Zig
+        shell: pwsh
+        run: |
+          $json = Invoke-RestMethod https://ziglang.org/download/index.json
+          $url = $json.master."x86_64-windows".tarball
+          $zip = "$env:TEMP\zig.zip"
+          Invoke-WebRequest -Uri $url -OutFile $zip
+          Expand-Archive $zip -DestinationPath "$env:USERPROFILE\zig" -Force
+          $dir = (Get-ChildItem "$env:USERPROFILE\zig" -Recurse -Filter "zig.exe").DirectoryName
+          echo "$dir" | Out-File $env:GITHUB_PATH -Append
+
+      - name: Build
+        shell: pwsh
+        run: |
+          $env:PATH += ";C:\msys64\ucrt64\bin"
+          zig build
+
+      - name: Package
+        shell: pwsh
+        run: |
+          # Collect exe + DLLs
+          $dist = "dist\Metanoia"
+          New-Item $dist -ItemType Directory -Force
+          Copy-Item "zig-out\bin\*" $dist -Recurse
+          Copy-Item "assets\metanoia.ico" $dist
+          Compress-Archive -Path "$dist\*" -DestinationPath "dist\Metanoia-$env:GITHUB_REF_NAME.zip"
+
+      - name: Release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: dist/Metanoia-*.zip
+          generate_release_notes: true

scripts/publish.sh

@@ -1,69 +1,20 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-# Publish latest build to GitHub Releases
-# Requires: gh CLI (https://cli.github.com)
-# Run after: bash ci/run-windows.sh  (or local zig build + scripts/package.sh)
+# Publish a new release.
+# This pushes a git tag, which triggers .github/workflows/release.yml
+# to build on Windows and create the GitHub Release automatically.
 
 GREEN='\033[0;32m'; YELLOW='\033[1;33m'; NC='\033[0m'
 info() { echo -e "${GREEN}❯${NC} $1"; }
-warn() { echo -e "${YELLOW}⚠${NC} $1"; }
 
-ROOT="$(cd "$(dirname "$0")/.." && pwd)"
-cd "$ROOT"
+VERSION="v$(date +%Y.%m.%d)-$(git rev-parse --short HEAD)"
 
-# ── Check prerequisites ────────────────────────────────────────
-if ! command -v gh &>/dev/null; then
-  warn "gh CLI not found. Install: https://cli.github.com"
-  warn "Then: gh auth login"
-  exit 1
-fi
+info "Tagging: $VERSION"
+git tag "$VERSION"
+git push origin "$VERSION"
 
-if ! gh auth status &>/dev/null; then
-  warn "Not authenticated. Run: gh auth login"
-  exit 1
-fi
-
-# ── Determine version ──────────────────────────────────────────
-VERSION="$(git describe --tags --always --dirty 2>/dev/null || echo "v0.0.0-$(git rev-parse --short HEAD)")"
-TAG="$VERSION"
-
-# ── Build if needed ────────────────────────────────────────────
-if [ ! -f "zig-out/bin/metanoia.exe" ]; then
-  info "Building..."
-  zig build 2>&1
-  bash scripts/package.sh
-fi
-
-# ── Find the installer or dist folder ───────────────────────────
-INSTALLER=$(ls dist/Metanoia-Setup-*.exe 2>/dev/null | head -1)
-DIST_ZIP="dist/Metanoia-${VERSION}.zip"
-
-if [ ! -f "$INSTALLER" ]; then
-  warn "No NSIS installer found — creating portable zip"
-  if [ ! -d "dist/Metanoia" ]; then
-    warn "No dist folder. Run: scripts/package.sh"
-    exit 1
-  fi
-  (cd dist && zip -r "../$DIST_ZIP" Metanoia/)
-  UPLOAD="$DIST_ZIP"
-  NOTES="Portable build (no installer) — unzip and run metanoia.exe"
-else
-  UPLOAD="$INSTALLER"
-  NOTES="NSIS installer — run Metanoia-Setup-*.exe to install"
-fi
-
-# ── Create GitHub Release ───────────────────────────────────────
-info "Creating GitHub release: $TAG..."
-gh release create "$TAG" \
-  "$UPLOAD" \
-  --title "Metanoia $VERSION" \
-  --notes "$NOTES" \
-  --generate-notes 2>&1 || {
-    # Release exists — update instead
-    info "Release exists — uploading asset..."
-    gh release upload "$TAG" "$UPLOAD" --clobber 2>&1
-  }
-
-info "Published: https://github.com/4cecoder/metanoia/releases/tag/$TAG"
-info "Done."
+info "GitHub Actions will build Windows release at:"
+info "  https://github.com/4cecoder/metanoia/actions"
+info "When complete, release appears at:"
+info "  https://github.com/4cecoder/metanoia/releases/tag/$VERSION"