fix: null check logic, silenced flag inversion, sequential query perf

- role-service had if (!userIds && userIds.length === 0) which crashes
  with TypeError when userIds is null — changed && to ||
- oauth-service was setting silenced based on the already-inverted
  active value instead of the original silenced field from the API
- email-service was awaiting three queries individually then passing
  the resolved values to Promise.all, making them run sequentially
  instead of in parallel

mail-worker/src/service/email-service.js

@@ -857,9 +857,9 @@ const emailService = {
 			query.orderBy(desc(email.emailId));
 		}
 
-		const listQuery = await query.limit(size).all();
-		const totalQuery = await queryCount.get();
-		const latestEmailQuery = await orm(c).select().from(email)
+		const listQuery = query.limit(size).all();
+		const totalQuery = queryCount.get();
+		const latestEmailQuery = orm(c).select().from(email)
 			.where(and(
 				eq(email.type, emailConst.type.RECEIVE),
 				ne(email.status, emailConst.status.SAVING)

mail-worker/src/service/oauth-service.js

@@ -70,7 +70,7 @@ const oauthService = {
 
 		userInfo.oauthUserId = String(userInfo.id);
 		userInfo.active = userInfo.active ? 0 : 1;
-		userInfo.silenced = userInfo.active ? 0 : 1;
+		userInfo.silenced = userInfo.silenced ? 0 : 1;
 		userInfo.trustLevel = userInfo.trust_level;
 		userInfo.avatar = userInfo.avatar_url;
 

mail-worker/src/service/role-service.js

@@ -177,7 +177,7 @@ const roleService = {
 
 	selectByUserIds(c, userIds) {
 
-		if (!userIds && userIds.length === 0) {
+		if (!userIds || userIds.length === 0) {
 			return [];
 		}