fix: Show blue background with spinner during validation

- Keep blue background when isCheckingReviews is true
- Add cursor-wait during validation
- Move disabled styling to explicit condition check
- White spinner now visible on blue background

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

web/components/ScraperTest.tsx

@@ -673,12 +673,16 @@ export default function ScraperTest({ onJobsChange, onSelectReviews }: ScraperTe
               onClick={handleSearch}
               disabled={!businessNameQuery.trim() || isCheckingReviews}
               className={`px-5 py-2.5 font-semibold rounded-lg transition-all flex items-center gap-2 whitespace-nowrap ${
-                hasReviews === true && buildSearchQuery() === searchedQuery
+                isCheckingReviews
+                  ? 'bg-blue-500 text-white cursor-wait'
+                  : hasReviews === true && buildSearchQuery() === searchedQuery
                   ? 'bg-green-600 text-white hover:bg-green-700'
                   : hasReviews === false && buildSearchQuery() === searchedQuery
                   ? 'bg-yellow-500 text-white hover:bg-yellow-600'
+                  : !businessNameQuery.trim()
+                  ? 'bg-gray-300 text-gray-500 cursor-not-allowed'
                   : 'bg-blue-600 text-white hover:bg-blue-700'
-              } disabled:bg-gray-300 disabled:cursor-not-allowed`}
+              }`}
             >
               {isCheckingReviews ? (
                 <>