fix: make release upload idempotent, delete existing assets before re-upload

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

.gitea/workflows/publish.yml

@@ -156,12 +156,12 @@ jobs:
           TOKEN="${{ secrets.GITHUB_TOKEN }}"
           VER="${GITHUB_REF_NAME#v}"
 
-          # Create release, fall back to existing if already present
+          # Create release or get existing
           RELEASE=$(curl -s -X POST "${API}/repos/${REPO}/releases" \
             -H "Authorization: token ${TOKEN}" \
             -H "Content-Type: application/json" \
             -d "{\"tag_name\":\"${TAG}\",\"name\":\"${TAG}\"}")
-          RELEASE_ID=$(echo "${RELEASE}" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])" 2>/dev/null)
+          RELEASE_ID=$(echo "${RELEASE}" | python3 -c "import sys,json; d=json.load(sys.stdin); print(d.get('id',''))" 2>/dev/null || true)
           if [ -z "${RELEASE_ID}" ]; then
             RELEASE=$(curl -s "${API}/repos/${REPO}/releases/tags/${TAG}" \
               -H "Authorization: token ${TOKEN}")
@@ -169,11 +169,27 @@ jobs:
           fi
           echo "Release ID: ${RELEASE_ID}"
 
-          # Upload assets
+          # Upload assets (delete existing with same name first)
           for file in \
             "artifacts/build-net9/Jellyfin-AutoBackup-${VER}-10.11.x.zip" \
             "artifacts/build-net10/Jellyfin-AutoBackup-${VER}-12.0.x.zip"; do
             NAME=$(basename "${file}")
+
+            # Delete existing asset if present
+            ASSETS=$(curl -s "${API}/repos/${REPO}/releases/${RELEASE_ID}/assets" \
+              -H "Authorization: token ${TOKEN}")
+            ASSET_ID=$(echo "${ASSETS}" | python3 -c "
+          import sys,json
+          assets=json.load(sys.stdin)
+          a=next((x for x in assets if x['name']=='${NAME}'),None)
+          print(a['id'] if a else '')
+          " 2>/dev/null || true)
+            if [ -n "${ASSET_ID}" ]; then
+              echo "Deleting existing asset ${NAME} (id=${ASSET_ID})..."
+              curl -s -X DELETE "${API}/repos/${REPO}/releases/${RELEASE_ID}/assets/${ASSET_ID}" \
+                -H "Authorization: token ${TOKEN}"
+            fi
+
             echo "Uploading ${NAME}..."
             HTTP_CODE=$(curl -s -o /tmp/upload_response.json -w "%{http_code}" \
               -X POST "${API}/repos/${REPO}/releases/${RELEASE_ID}/assets?name=${NAME}" \