feat(libra/balance): show fiat balances alongside sats

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/accounting-app/views/BalancePage.vue

@@ -17,9 +17,14 @@ const expensesAPI = injectService<ExpensesAPI>(SERVICE_TOKENS.EXPENSES_API)
 
 const balance = ref<number | null>(null)
 const balanceCurrency = ref<string>('sats')
+const fiatBalances = ref<Record<string, number>>({})
 const pendingTransactions = ref<Transaction[]>([])
 const isLoading = ref(true)
 
+const fiatBalanceEntries = computed(() =>
+  Object.entries(fiatBalances.value).filter(([, amount]) => Math.abs(amount) > 0.005)
+)
+
 const walletKey = computed(() => user.value?.wallets?.[0]?.inkey)
 const budgetsEnabled = computed(() => import.meta.env.VITE_LIBRA_BUDGETS_ENABLED === 'true')
 
@@ -55,6 +60,7 @@ async function loadData() {
 
     balance.value = balanceData.balance
     balanceCurrency.value = balanceData.currency || 'sats'
+    fiatBalances.value = balanceData.fiat_balances || {}
 
     // Filter for pending transactions (flag = '!')
     pendingTransactions.value = txData.entries.filter(tx => tx.flag === '!')
@@ -112,6 +118,15 @@ function formatFiat(amount: number, currency: string): string {
             </span>
             <span class="text-lg text-muted-foreground">{{ balanceCurrency }}</span>
           </div>
+          <div v-if="fiatBalanceEntries.length > 0" class="flex flex-wrap items-center gap-x-3 gap-y-1 pl-7">
+            <span
+              v-for="[currency, amount] in fiatBalanceEntries"
+              :key="currency"
+              class="text-base text-muted-foreground"
+            >
+              {{ formatFiat(Math.abs(amount), currency) }}
+            </span>
+          </div>
           <p class="text-sm" :class="libraOwesUser ? 'text-green-600 dark:text-green-400' : 'text-red-600 dark:text-red-400'">
             {{ libraOwesUser ? t('libra.balance.owedToYou') : t('libra.balance.youOwe') }}
           </p>

src/modules/expenses/services/ExpensesAPI.ts

@@ -245,7 +245,11 @@ export class ExpensesAPI extends BaseService {
   /**
    * Get user's balance with libra
    */
-  async getUserBalance(walletKey: string): Promise<{ balance: number; currency: string }> {
+  async getUserBalance(walletKey: string): Promise<{
+    balance: number
+    currency: string
+    fiat_balances?: Record<string, number>
+  }> {
     try {
       const response = await fetch(`${this.baseUrl}/libra/api/v1/balance`, {
         method: 'GET',