fix: use grep on file directly instead of echo piping for body test

tests/test.sh

@@ -66,12 +66,19 @@ cleanup() {
 curl -sf -o "$TMPDIR/body" -D "$TMPDIR/headers" "$BASE_URL/"
 STATUS=$(head -1 "$TMPDIR/headers" | grep -oP '\d{3}')
 CONTENT_TYPE=$(grep -i 'content-type' "$TMPDIR/headers" | tr -d '\r' | cut -d: -f2- | xargs)
-BODY=$(cat "$TMPDIR/body")
 trap cleanup EXIT
 
 assert "HTTP status is 200" "200" "$STATUS"
 assert_match "Content-Type is text/html" "text/html" "$CONTENT_TYPE"
-assert_match "Body contains RSS-Bridge" "[Rr][Ss][Ss].*[Bb]ridge" "$BODY"
+
+TOTAL=$((TOTAL + 1))
+if grep -qEi "[Rr][Ss][Ss].*[Bb]ridge" "$TMPDIR/body"; then
+  echo "  PASS: Body contains RSS-Bridge"
+  PASSED=$((PASSED + 1))
+else
+  echo "  FAIL: Body contains RSS-Bridge (pattern not found)"
+  FAILED=$((FAILED + 1))
+fi
 
 echo ""
 echo "Results: $PASSED/$TOTAL passed, $FAILED failed"