Filters journal entries by user account

Updates journal entry retrieval to filter entries based on
the user's accounts rather than the user ID.

This ensures that users only see journal entries that
directly affect their accounts.

Also displays fiat amount in journal entries if available in
the metadata.

static/js/index.js

@@ -520,6 +520,17 @@ window.app = Vue.createApp({
     getTotalAmount(entry) {
       if (!entry.lines || entry.lines.length === 0) return 0
       return entry.lines.reduce((sum, line) => sum + line.debit + line.credit, 0) / 2
+    },
+    getEntryFiatAmount(entry) {
+      // Extract fiat amount from metadata if available
+      if (!entry.lines || entry.lines.length === 0) return null
+
+      for (const line of entry.lines) {
+        if (line.metadata && line.metadata.fiat_currency && line.metadata.fiat_amount) {
+          return this.formatFiat(line.metadata.fiat_amount, line.metadata.fiat_currency)
+        }
+      }
+      return null
     }
   },
   async created() {