Poprawki API i panelu admina

public/app.html

@@ -41,11 +41,6 @@
       <h1 class="logo-text">Karczma Biesiada</h1>
       <div id="tableLabel" class="table-badge">Wybierz stolik</div>
     </header>
-    <div style="background: rgba(226, 176, 126, 0.1); border: 1px solid rgba(226, 176, 126, 0.3); border-radius: 12px; padding: 12px; margin-bottom: 24px; text-align: center; font-size: 13px; color: var(--text-muted); line-height: 1.5;">
-      <span style="color: var(--primary); font-weight: 600; display: block; margin-bottom: 4px;">Wdrażamy nową aplikację! 🚀</span>
-      Testujemy właśnie nowe funkcje. Niebawem z tego miejsca będziesz mógł wezwać obsługę lub poprosić o rachunek.
-    </div>
-
     <!-- <div id="greetingBanner"
       style="display:none; text-align:center; padding: 10px; font-weight:600; color:var(--primary); font-family:'Playfair Display', serif; font-size:18px;">
     </div> -->
@@ -146,10 +141,10 @@
       <span class="nav-icon">📖</span>
       <span class="nav-label">Menu</span>
     </div>
-    <!-- <div class="nav-item action-call" onclick="openWaiterDialog()">
+    <div class="nav-item action-call" onclick="openWaiterDialog()">
       <span class="nav-icon">🛎️</span>
       <span class="nav-label">Kelner</span>
-    </div> -->
+    </div>
     <div class="nav-item action-bill" onclick="openBillDialog()">
       <span class="nav-icon">💳</span>
       <span class="nav-label">Rachunek</span>
@@ -245,7 +240,7 @@
         <div style="display:flex; gap:12px;">
           <button class="btn btn-secondary" style="flex:1;" onclick="goBackToBillList()"
             id="btnBackToBills">Wróć</button>
-          <!-- <button class="btn btn-primary" style="flex:2;" onclick="goToStep('stepPayment')">Poproś rachunek</button> -->
+          <button class="btn btn-primary" style="flex:2;" onclick="proceedToBillPayment()">Poproś rachunek</button>
         </div>
       </div>