fix(author): sanitize log filenames to remove special characters

Applied sanitizeForPath to log filenames in createAuthorLog to ensure
log files don't contain special characters like apostrophes.

Before: ifuckedmybestfriend'sgirlfriend-author.videotools.log
After:  ifuckedmybestfriendsgirlfriend-author.videotools.log

This prevents filesystem issues and improves consistency with output
filenames.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

author_module.go

@@ -3184,6 +3184,11 @@ func createAuthorLog(inputs []string, outputPath string, makeISO bool, region, a
 	if base == "" {
 		base = "author"
 	}
+	// Sanitize log filename to remove special characters
+	base = sanitizeForPath(base)
+	if base == "" {
+		base = "author"
+	}
 	logPath := filepath.Join(getLogsDir(), base+"-author"+conversionLogSuffix)
 	if err := os.MkdirAll(filepath.Dir(logPath), 0o755); err != nil {
 		return nil, logPath, fmt.Errorf("create log dir: %w", err)