Show and accept amounts in PLM in the test/admin UIs

Balance, withdrawal amount and bet_amount_sats are entered/displayed in
PLM in both static pages; conversion to sats happens client-side right
before the API call, since the backend contract stays sats-based.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/static/index.html

@@ -48,7 +48,7 @@
   <div>Indirizzo di deposito / vincite:</div>
   <div class="addr" id="dash-address"></div>
   <div style="margin-top:12px">Saldo interno:</div>
-  <div class="balance"><span id="dash-balance">-</span> sats <button onclick="refreshMe()">Aggiorna</button></div>
+  <div class="balance"><span id="dash-balance">-</span> PLM <button onclick="refreshMe()">Aggiorna</button></div>
 
   <hr>
   <h3>Bet</h3>
@@ -58,8 +58,8 @@
   <h3>Withdrawal</h3>
   <label>Indirizzo esterno</label>
   <input id="wd-address" placeholder="plm1q...">
-  <label>Importo (sats, 1 PLM = 100000000 sats)</label>
-  <input id="wd-amount" placeholder="es. 200000000 per 2 PLM">
+  <label>Importo (PLM)</label>
+  <input id="wd-amount" placeholder="es. 2 per 2 PLM">
   <button onclick="withdraw()">Preleva</button>
 </section>
 
@@ -123,10 +123,12 @@ function logout() {
   document.getElementById('auth-section').classList.remove('hidden');
 }
 
+const SATS_PER_PLM = 100000000;
+
 async function refreshMe() {
   try {
     const data = await call('GET', '/users/me');
-    document.getElementById('dash-balance').textContent = data.balance_sats;
+    document.getElementById('dash-balance').textContent = data.balance_sats / SATS_PER_PLM;
   } catch (e) {}
 }
 
@@ -137,8 +139,9 @@ async function placeBet() {
 
 async function withdraw() {
   const ext = document.getElementById('wd-address').value;
-  const amt = parseInt(document.getElementById('wd-amount').value, 10);
-  try { await call('POST', '/withdrawals', { external_address: ext, amount_sats: amt }); } catch (e) {}
+  const amtPlm = parseFloat(document.getElementById('wd-amount').value);
+  const amtSats = Math.round(amtPlm * SATS_PER_PLM);
+  try { await call('POST', '/withdrawals', { external_address: ext, amount_sats: amtSats }); } catch (e) {}
   refreshMe();
 }