fix duplication of threads on account change

back/db/api-db.ts

@@ -27,7 +27,7 @@ export async function getAccounts() {
     return await execQueryAsync(query, values);
 }
 
-export async function getRooms(mailboxId) {
+export async function getRooms(mailboxId: number) {
     const query = `
         SELECT 
             room.room_id AS id,