Added quote expiry-aware flows with auto-refresh

frontend/pweb/lib/l10n/en.arb

@@ -383,6 +383,19 @@
   "payout": "Payout",
   "sendTo": "Send Payout To",
   "send": "Send Payout",
+  "quoteUnavailable": "Waiting for a quote...",
+  "quoteUpdating": "Refreshing quote...",
+  "quoteExpiresIn": "Quote expires in {time}",
+  "@quoteExpiresIn": {
+    "placeholders": {
+      "time": {
+        "type": "String"
+      }
+    }
+  },
+  "quoteExpired": "Quote expired, request a new one",
+  "quoteAutoRefresh": "Auto-refresh quote",
+  "quoteErrorGeneric": "Could not refresh quote, try again later",
   "recipientPaysFee": "Recipient pays the fee",
 
   "sentAmount": "Sent amount: {amount}",