refactor: improve responsible person display in TableRequestList component

src/pages/08_request-list/TableRequestList.vue

@@ -265,11 +265,12 @@ function getEmployeeName(
           @cancel="$emit('delete', props.row)"
         >
           <template v-slot:responsiblePerson="{ props: subProps }">
-            <div class="col-4 app-text-muted q-pr-sm self-center">
+            <div class="col-4 app-text-muted q-pr-sm">
               {{ subProps.label }}
             </div>
             <div class="col-8">
               <AvatarGroup
+                v-if="(responsiblePerson(props.row.quotation) ?? []).length > 0"
                 :data="
                   responsiblePerson(props.row.quotation)?.map((v) => {
                     return {
@@ -286,6 +287,7 @@ function getEmployeeName(
                   })
                 "
               />
+              <span v-else>-</span>
             </div>
           </template>
         </QuotationCard>