fix: improve conditional check for image size in GHCR deletion script

scripts/prune-container-images.sh

@@ -106,7 +106,7 @@ action_delete_ghcr() {
           manifest=$(curl -sS -H "Accept: application/vnd.docker.distribution.manifest.v2+json" -H "Authorization: Bearer $GITHUB_TOKEN" "$manifest_url" || true)
           if [[ -n "$manifest" ]]; then
             bytes=$(echo "$manifest" | jq -r '.layers // [] | map(.size) | add // 0')
-            if [[ "$bytes" != "null" && "$bytes" -gt 0 2>/dev/null ]]; then
+            if [[ "$bytes" != "null" ]] && (( bytes > 0 )) 2>/dev/null; then
               candidate_bytes=$((candidate_bytes + bytes))
             fi
           fi

scripts/qa-test-auth-certificates.sh

@@ -19,8 +19,8 @@ REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
 TEST_RESULTS="$REPO_ROOT/test-results/qa-auth-test-results.log"
 
 # Clear previous results
-> "$TEST_RESULTS"
-> "$COOKIE_FILE"
+: > "$TEST_RESULTS"
+: > "$COOKIE_FILE"
 
 echo -e "${BLUE}=== QA Test: Certificate Page Authentication ===${NC}"
 echo "Testing authentication fixes for certificate endpoints"