Fix flakey test failures by removing cache=shared which is a discouraged mode (https://www.sqlite.org/sharedcache.html). WAL is sufficient for our purposes. Plus fix a bug where the TUI would go into an infinite loop if there were zero results.

client/lib/lib.go

@@ -409,6 +409,7 @@ func AddToDbIfNew(db *gorm.DB, entry data.HistoryEntry) {
 	tx.Limit(1).Find(&results)
 	if len(results) == 0 {
 		db.Create(entry)
+		// TODO: check the error here and bubble it up
 	}
 }