fix(engines): remove unsupported lookahead from Google regex

Go's regexp package doesn't support Perl lookahead (?=...). Removing
the unnecessary lookahead since each MjjYud div is self-contained.

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

internal/engines/google.go

@@ -129,7 +129,7 @@ func detectGoogleSorry(resp *http.Response) bool {
 func parseGoogleResults(body, query string) []contracts.MainResult {
 	var results []contracts.MainResult
 
-	mjjPattern := regexp.MustCompile(`<div[^>]*class="[^"]*MjjYud[^"]*"[^>]*>(.*?)</div>\s*(?=<div[^>]*class="[^"]*MjjYud|$)`)
+	mjjPattern := regexp.MustCompile(`<div[^>]*class="[^"]*MjjYud[^"]*"[^>]*>(.*?)</div>`)
 	matches := mjjPattern.FindAllStringSubmatch(body, -1)
 
 	for i, match := range matches {