fix: publish Helm chart to Gitea Package Registry instead of gh-pages

Replace gh-pages branch index approach with direct upload to the
official Gitea Package Registry (same method as helm-release.yaml).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/image-update-and-release.yaml

@@ -5,6 +5,10 @@ on:
     - cron: '0 2 * * 1'
   workflow_dispatch:
 
+env:
+  REGISTRY_URL: https://git.cafepieters.com
+  OWNER: helmchart
+
 jobs:
   update-and-release:
     runs-on: ubuntu-latest
@@ -222,7 +226,9 @@ jobs:
         if: steps.check_update.outputs.php_updated == 'true'
         run: |
           helm package .
-          echo "Helm chart packaged"
+          CHART_FILE=$(ls *.tgz)
+          echo "CHART_FILE=${CHART_FILE}" >> $GITHUB_ENV
+          echo "Helm chart packaged: ${CHART_FILE}"
 
       - name: Create Git Tag
         if: steps.check_update.outputs.php_updated == 'true'
@@ -258,54 +264,18 @@ jobs:
             echo "Release created"
           fi
 
-      - name: Update Helm Repository Index
+      - name: Publish to Gitea Package Registry
         if: steps.check_update.outputs.php_updated == 'true'
         run: |
-          set -e
+          echo "🚀 Publishing ${CHART_FILE} to Gitea Package Registry..."
-          APP_VERSION="${{ steps.php.outputs.app_version }}"
-          CHART_NAME=$(grep '^name:' Chart.yaml | awk '{print $2}')
-          PACKAGE_FILE="${CHART_NAME}-${APP_VERSION}.tgz"
 
-          echo "Preparing Helm repository update..."
+          curl --fail-with-body \
+            -u "${{ secrets.REGISTRY_USER }}:${{ secrets.REGISTRY_TOKEN }}" \
+            -X POST \
+            --upload-file "${CHART_FILE}" \
+            "${REGISTRY_URL}/api/packages/${OWNER}/helm/api/charts"
 
-          # パッケージファイルを一時ディレクトリに移動
+          echo "✅ Chart published successfully!"
-          mkdir -p /tmp/helm-repo
-          cp "${PACKAGE_FILE}" /tmp/helm-repo/
-          
-          # gh-pagesブランチの処理
-          if git ls-remote --heads origin gh-pages | grep gh-pages; then
-            echo "gh-pages branch exists, checking out..."
-            git fetch origin gh-pages
-            git checkout gh-pages
-          else
-            echo "Creating new gh-pages branch..."
-            git checkout --orphan gh-pages
-            git rm -rf . || true
-            echo "# Helm Repository" > README.md
-            git add README.md
-            git config user.name "GitHub Actions Bot"
-            git config user.email "actions@github.com"
-            git commit -m "Initialize gh-pages branch"
-            git push origin gh-pages
-          fi
-          
-          # パッケージファイルをコピー
-          cp /tmp/helm-repo/"${PACKAGE_FILE}" .
-          
-          # index.yamlを生成/更新
-          helm repo index . --url "https://git.cafepieters.com/${GITHUB_REPOSITORY}/raw/branch/gh-pages"
-          
-          # コミットしてプッシュ
-          git config user.name "GitHub Actions Bot"
-          git config user.email "actions@github.com"
-          git add "${PACKAGE_FILE}" index.yaml
-          git commit -m "chore: add ${CHART_NAME} v${APP_VERSION}" || echo "No changes to commit"
-          git push origin gh-pages
-          
-          echo "Helm repository updated successfully"
-          
-          # mainブランチに戻る
-          git checkout main
 
       - name: Summary
         if: steps.check_update.outputs.update_needed == 'true'