fix: initiative - auto-init deck, CSS stylisé, plus d'erreurs de formule

- Auto-initialisation du deck s'il est vide ou non initialisé
- Fallback silencieux sur 1d6 si vraiment aucune carte dispo
- _formula changé en '1d1' pour éviter les erreurs de parsing
- Ajout du CSS complet pour le message d'initiative (chat.less)
  - Fond dégradé sombre, bordure rouge, badge arrondi
  - Avatar, nom, carte, valeur, score d'initiative
  - Pied de page stylisé

css/fvtt-hamalron.css

@@ -2997,6 +2997,87 @@ i.fvtt-hamalron {
     box-shadow: 0 0 20px rgba(255, 215, 0, 0.8);
   }
 }
+.initiative-roll {
+  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
+  border: 1px solid #e94560;
+  border-radius: 8px;
+  overflow: hidden;
+  font-family: var(--font-secondary, sans-serif);
+}
+.initiative-roll .initiative-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 8px 12px;
+  background: rgba(233, 69, 96, 0.15);
+  border-bottom: 1px solid rgba(233, 69, 96, 0.3);
+}
+.initiative-roll .initiative-header .initiative-actor {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+.initiative-roll .initiative-header .initiative-actor .initiative-avatar {
+  width: 32px;
+  height: 32px;
+  border-radius: 50%;
+  border: 2px solid #e94560;
+  object-fit: cover;
+}
+.initiative-roll .initiative-header .initiative-actor .initiative-name {
+  color: #e0e0e0;
+  font-size: 14px;
+  font-weight: 600;
+}
+.initiative-roll .initiative-header .initiative-badge {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  background: #e94560;
+  color: #fff;
+  font-size: 20px;
+  font-weight: 700;
+  padding: 4px 14px;
+  border-radius: 20px;
+  box-shadow: 0 0 10px rgba(233, 69, 96, 0.5);
+}
+.initiative-roll .initiative-card {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 12px;
+}
+.initiative-roll .initiative-card .initiative-card-img {
+  width: 48px;
+  height: 48px;
+  object-fit: contain;
+  border-radius: 4px;
+  background: rgba(255, 255, 255, 0.05);
+  padding: 4px;
+}
+.initiative-roll .initiative-card .initiative-card-info {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+.initiative-roll .initiative-card .initiative-card-info .card-name {
+  color: #f0e6d3;
+  font-size: 13px;
+  font-weight: 500;
+}
+.initiative-roll .initiative-card .initiative-card-info .card-value {
+  color: #aaa;
+  font-size: 12px;
+}
+.initiative-roll .initiative-footer {
+  text-align: center;
+  padding: 4px;
+  background: rgba(233, 69, 96, 0.08);
+  font-size: 11px;
+  color: #e94560;
+  text-transform: uppercase;
+  letter-spacing: 2px;
+}
 .application.dialog.fvtt-hamalron {
   color: var(--color-dark-1);
   background-color: var(--color-light-1);