Revert "Simplify CI: metainfo releases only accumulate in Flathub repo"

This reverts commit f265b7a572.

.github/workflows/flathub.yml

@@ -4,7 +4,7 @@ on:
     types: [published]
 
 permissions:
-  contents: read
+  contents: write
 
 jobs:
   update-flathub:
@@ -34,6 +34,15 @@ jobs:
       - name: Run update-manifest.sh
         run: bash flatpak/update-manifest.sh "${{ github.event.release.tag_name }}"
 
+      - name: Commit metainfo update to app repo
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add flatpak/app.yaak.Yaak.metainfo.xml
+          git diff --cached --quiet && echo "No metainfo changes" && exit 0
+          git commit -m "Add ${{ github.event.release.tag_name }} to metainfo releases"
+          git push origin HEAD:main
+
       - name: Checkout Flathub repo
         uses: actions/checkout@v4
         with:
@@ -42,19 +51,15 @@ jobs:
           path: flathub-repo
 
       - name: Copy updated files to Flathub repo
-        env:
-          VERSION: ${{ github.event.release.tag_name }}
         run: |
           cp flatpak/app.yaak.Yaak.yml flathub-repo/
+          cp flatpak/app.yaak.Yaak.metainfo.xml flathub-repo/
           cp flatpak/cargo-sources.json flathub-repo/
           cp flatpak/node-sources.json flathub-repo/
           cp LICENSE flathub-repo/
-          # Rewrite paths for Flathub repo flat structure
           sed -i 's|path: \.\./LICENSE|path: LICENSE|' flathub-repo/app.yaak.Yaak.yml
           sed -i 's|install -Dm644 flatpak/app.yaak.Yaak.metainfo.xml|install -Dm644 app.yaak.Yaak.metainfo.xml|' flathub-repo/app.yaak.Yaak.yml
           sed -i '/path: LICENSE/a\      # Metainfo file (with release history)\n      - type: file\n        path: app.yaak.Yaak.metainfo.xml' flathub-repo/app.yaak.Yaak.yml
-          # Add new release to Flathub metainfo (accumulates over time)
-          sed -i "s|  <releases>|  <releases>\n    <release version=\"${VERSION#v}\" date=\"$(date +%Y-%m-%d)\" />|" flathub-repo/app.yaak.Yaak.metainfo.xml
 
       - name: Commit and push to Flathub
         working-directory: flathub-repo