ci(workflows): add release job with notes, assets

Introduce a create-release job triggered on push to master/main. The job
downloads build artifacts, extracts the version from Cargo.toml,
determines the last tag, generates AI-based release notes from the git
log, creates a Gitea release, and uploads packaged assets.

- needs: package; runs on ubuntu-22.04
- downloads artifacts via gitea-download-artifact
- generates release notes using OpenAI (gpt-4o)
- creates release via Gitea API and uploads assets

Requires repository secrets:
- RELEASE_TOKEN for release creation and asset upload
- OPENAI_API_KEY for release notes generation

.gitea/workflows/multi-platform.yml

@@ -48,4 +48,125 @@ jobs:
       # The target is passed to the reusable workflow
       target: ${{ matrix.target }}
       upload-artifacts: true
-      package-only: true
+      package-only: true
+
+  # Create GitHub release with all artifacts
+  create-release:
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/master' || github.ref == 'refs/heads/main')
+    needs: [package]
+    runs-on: ubuntu-22.04
+    name: Create GitHub Release
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # Fetch full history for release notes generation
+
+      - name: Download all artifacts
+        uses: https://github.com/christopherHX/gitea-download-artifact@v4
+        with:
+          path: artifacts/
+
+      - name: Extract version from Cargo.toml
+        id: version
+        run: |
+          VERSION=$(sed -n 's/^version\s*=\s*"\([^"]\+\)"/\1/p' Cargo.toml | head -n1)
+          echo "version=v$VERSION" >> $GITHUB_OUTPUT
+          echo "Version: v$VERSION"
+
+      - name: Get last release tag
+        id: last_tag
+        run: |
+          LAST_TAG=$(git describe --tags --abbrev=0 HEAD~1 2>/dev/null || echo "")
+          if [ -z "$LAST_TAG" ]; then
+            LAST_TAG=$(git rev-list --max-parents=0 HEAD)
+          fi
+          echo "last_tag=$LAST_TAG" >> $GITHUB_OUTPUT
+          echo "Last tag/commit: $LAST_TAG"
+
+      - name: Generate release notes with GPT-5
+        id: release_notes
+        env:
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+        run: |
+          # Get git log since last release
+          if [ -n "${{ steps.last_tag.outputs.last_tag }}" ]; then
+            GIT_LOG=$(git log --pretty=format:"- %s (%an)" ${{ steps.last_tag.outputs.last_tag }}..HEAD)
+          else
+            GIT_LOG=$(git log --pretty=format:"- %s (%an)" HEAD~10..HEAD)
+          fi
+
+          # Create a temporary file for the API request
+          cat > request.json << EOF
+          {
+            "model": "gpt-4o",
+            "messages": [
+              {
+                "role": "system",
+                "content": "You are a technical writer creating GitHub release notes. Generate professional, concise release notes based on git commit history. Focus on user-facing changes and improvements. Use proper markdown formatting with sections like ## What's New, ## Improvements, ## Bug Fixes, etc. Keep it under 500 words."
+              },
+              {
+                "role": "user",
+                "content": "Generate release notes for version ${{ steps.version.outputs.version }} based on these commits:\\n\\n$GIT_LOG"
+              }
+            ],
+            "max_tokens": 1000,
+            "temperature": 0.3
+          }
+          EOF
+
+          # Make API request to OpenAI
+          RESPONSE=$(curl -s -X POST "https://api.openai.com/v1/chat/completions" \
+            -H "Content-Type: application/json" \
+            -H "Authorization: Bearer $OPENAI_API_KEY" \
+            -d @request.json)
+
+          # Extract the content and save to file
+          echo "$RESPONSE" | jq -r '.choices[0].message.content' > release_notes.md
+
+          # Set output for use in release creation
+          {
+            echo 'notes<<EOF'
+            cat release_notes.md
+            echo 'EOF'
+          } >> $GITHUB_OUTPUT
+
+      - name: Prepare release assets
+        run: |
+          mkdir -p release_assets
+          find artifacts/ -name "*.tar.gz" -o -name "*.zip" | while read file; do
+            cp "$file" release_assets/
+          done
+          ls -la release_assets/
+
+      - name: Create Gitea Release
+        run: |
+          # Create the release using Gitea API
+          curl -X POST \
+            -H "Authorization: token ${{ secrets.RELEASE_TOKEN }}" \
+            -H "Content-Type: application/json" \
+            -d '{
+              "tag_name": "${{ steps.version.outputs.version }}",
+              "name": "Release ${{ steps.version.outputs.version }}",
+              "body": "'"$(cat release_notes.md | sed 's/"/\\"/g' | tr '\n' '\\n')"'",
+              "draft": false,
+              "prerelease": false
+            }' \
+            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases"
+
+      - name: Upload release assets
+        run: |
+          # Get the release ID from the created release
+          RELEASE_ID=$(curl -s -H "Authorization: token ${{ secrets.RELEASE_TOKEN }}" \
+            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/tags/${{ steps.version.outputs.version }}" | \
+            jq -r '.id')
+
+          # Upload each asset
+          for file in release_assets/*; do
+            filename=$(basename "$file")
+            echo "Uploading $filename..."
+            curl -X POST \
+              -H "Authorization: token ${{ secrets.RELEASE_TOKEN }}" \
+              -H "Content-Type: application/octet-stream" \
+              --data-binary @"$file" \
+              "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/$RELEASE_ID/assets?name=$filename"
+          done