ci(release): auto-delete existing release before creating new one

- Checks if release already exists for the tag
- Automatically deletes conflicting release if found
- Prevents duplicate/stale releases when recreating tags
- Ensures fresh binaries when tag is recreated

This fixes the issue where recreating a tag would keep old
release with outdated binaries.

.gitea/workflows/release.yml

@@ -152,6 +152,29 @@ jobs:
           echo "Release notes:"
           cat /tmp/release_notes.md
 
+      - name: Delete existing release if it exists
+        run: |
+          VERSION="${{ steps.version.outputs.version }}"
+
+          echo "Checking for existing release $VERSION..."
+
+          # Try to get existing release by tag
+          EXISTING_RELEASE_ID=$(curl -s \
+            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+            "https://code.foss.global/api/v1/repos/serve.zone/nupst/releases/tags/$VERSION" \
+            | jq -r '.id // empty')
+
+          if [ -n "$EXISTING_RELEASE_ID" ]; then
+            echo "Found existing release (ID: $EXISTING_RELEASE_ID), deleting..."
+            curl -X DELETE -s \
+              -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+              "https://code.foss.global/api/v1/repos/serve.zone/nupst/releases/$EXISTING_RELEASE_ID"
+            echo "Existing release deleted"
+            sleep 2
+          else
+            echo "No existing release found, proceeding with creation"
+          fi
+
       - name: Create Gitea Release
         run: |
           VERSION="${{ steps.version.outputs.version }}"