feat: Check for negative shares in voting

Author: oSumAtrIX

src/routes/api/[sessionKey]/+server.ts

@@ -168,6 +168,11 @@ export const POST: RequestHandler = async ({ params, request, platform }) => {
 			badRequestError('All participants must have a description before voting');
 		}
 
+		const negativeShare = vote.participants.some((p) => p.share < 0);
+		if (negativeShare) {
+			badRequestError('No share can be nagative');
+		}
+
 		const totalShares = vote.participants.reduce((sum, s) => sum + s.share, 0);
 		if (totalShares != session.stake) {
 			badRequestError('Total shares must equal session stake');