Fix errors from type in UI

Author: noah

ui/src/components/ApproversSelect.tsx

@@ -32,9 +32,9 @@ export default function ApproversSelect(props: ApproversSelectProps): JSX.Elemen
     }, 800)
 
     const _onSelectCandidate = (id: string) => {
-        const candidate = props.candidates.find(c => c.id.toString() ===id)
+        const candidate = props.candidates.find(c => c.id === parseInt(id))
         if (candidate === undefined) {
-            return
+            throw new Error("The candidate is undefined.")
         }
 
         onSelectCandidate(candidate)

ui/src/views/Deployment.tsx

@@ -101,14 +101,14 @@ export default function DeploymentView(): JSX.Element {
     }
 
     const onSelectCandidate = (id: string) => {
-        const approval = approvals.find(a => a.user?.id.toString() === id) 
+        const approval = approvals.find(a => a.user?.id === parseInt(id)) 
 
         if (approval !== undefined) {
             dispatch(deleteApproval(approval))
             return
         }
 
-        const candidate = candidates.find(c => c.id.toString() === id)
+        const candidate = candidates.find(c => c.id === parseInt(id))
         if (candidate === undefined) {
             throw new Error("The candidate is not found")
         }