feat: Add universal victory celebration modal, chamber item requirements, and fix broom & cauldron displays

app/templates/duel.html

@@ -11,6 +11,31 @@
     </p>
 </div>
 
+{% if is_locked and lock_info %}
+<div class="chamber-lock-banner">
+    <div class="chamber-lock-icon">🔒</div>
+    <h2 class="chamber-lock-title">Kammer Versiegelt!</h2>
+    <p class="chamber-lock-desc">
+        {{ lock_info.reason }}
+    </p>
+    <div class="chamber-req-box">
+        <div class="chamber-req-icon">{{ lock_info.item_icon }}</div>
+        <div class="chamber-req-info">
+            <strong>{{ lock_info.item_name }}</strong>
+            <span>Erforderlich aus: {{ lock_info.from_chamber }}</span>
+        </div>
+    </div>
+    <div class="chamber-lock-actions">
+        <a href="{{ lock_info.from_url }}" class="btn-magical">
+            ➔ Zu {{ lock_info.from_chamber }} gehen
+        </a>
+        <a href="?alohomora=1" class="alohomora-link">
+            ✨ Zauberspruch »Alohomora« wirken (Prüfung für Spielleiter / Tester freischalten)
+        </a>
+    </div>
+</div>
+{% endif %}
+
 <div class="canvas-wrapper">
     <div class="game-hud">
         <div>🪄 Spruch: <strong id="spellName" style="color: var(--gold);">Flipendo ⚡</strong></div>