fix things

src/pages/rules/EditCharacterRuleBook.vue

@@ -25,6 +25,7 @@ const ledgersToUse = computed(() => [systemLedger, ...ledgers.value.filter(isMai
 const character = ref<Character>();
 const ruleBook = ref<RuleBook>();
 const bindings = ref<Bindings>({});
+const ledgerRefs = computed<string[]>(() => ruleBook.value?.ledgerRefs ?? [])
 
 watchEffect(async () => {
   const characterId = character.value?.characterId;
@@ -85,7 +86,7 @@ watch(useRoute(), async route => {
     <div class="flex-col border-b-1">
       Ledger Bindings:
       <div class="flex flex-wrap items-center mb-2 mt-2">
-        <div class="me-2" v-for="ref in ruleBook.ledgerRefs" :ref="ref">
+        <div class="me-2" v-for="ref in ledgerRefs" :ref="ref">
           <span class="me-1">{{ref}}:</span>
           <LedgerSelect :ledgers="ledgersToUse" :modelValue="bindings[ref] ?? systemLedger" @update:modelValue="value => bindings[ref] = value" />
         </div>