add frontend format support for currencies, add currencies endpoint

resources/js/Components/Common/StatCard.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 defineProps<{
     title: string;
-    value: string;
+    value?: string;
 }>();
 </script>
 
@@ -10,7 +10,7 @@ defineProps<{
         class="rounded-lg bg-card-background border-card-border shadow-card border px-3.5 py-2.5">
         <dt class="font-semibold text-sm text-text-secondary">{{ title }}</dt>
         <dd class="text-2xl text-text-primary pt-1 font-semibold">
-            {{ value }}
+            {{ value ?? '--' }}
         </dd>
     </div>
 </template>