feat: implémentation complète du système Célestopol 1922 pour FoundryVTT v13

- DataModels (character, npc, anomaly, aspect, attribute, equipment)
- ApplicationV2 sheets (character 5 tabs, npc 3 tabs, 4 item sheets)
- DialogV2 pour les jets de dés avec phase de lune
- Templates Handlebars complets (fiches PJ/PNJ, items, jet, chat)
- Styles LESS → CSS compilé (thème vert foncé / orange CopaseticNF)
- i18n fr.json complet (clés CELESTOPOL.*)
- Point d'entrée fvtt-celestopol.mjs avec hooks init/ready
- Assets : polices CopaseticNF, images UI, icônes items
- Mise à jour copilot-instructions.md avec l'architecture réelle

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

styles/global.less

@@ -0,0 +1,158 @@
+// ─── Variables CSS (couleurs + typo) ────────────────────────────────────────
+
+:root {
+  --cel-green:        rgb(12, 76, 12);
+  --cel-green-light:  rgb(20, 110, 20);
+  --cel-green-dark:   rgb(6, 40, 6);
+  --cel-orange:       #e07b00;
+  --cel-orange-light: #f0a040;
+  --cel-cream:        #f5f0e8;
+  --cel-border:       #8b7355;
+  --cel-shadow:       rgba(0,0,0,0.4);
+
+  --cel-font-title:   "CopaseticNF", "Palatino Linotype", serif;
+  --cel-font-body:    "Palatino Linotype", "Book Antiqua", Palatino, serif;
+  --cel-font-ui:      "Signika", "Palatino Linotype", sans-serif;
+}
+
+// ─── Sheet base layout ───────────────────────────────────────────────────────
+
+.celestopol {
+  &.sheet {
+    background: var(--cel-cream);
+    font-family: var(--cel-font-body);
+    color: #1a1209;
+
+    .window-content {
+      padding: 0;
+      overflow: hidden;
+      display: flex;
+      flex-direction: column;
+      background: var(--cel-cream);
+    }
+  }
+
+  // ─── Header ──────────────────────────────────────────────────────────────
+
+  .sheet-header {
+    display: flex;
+    align-items: stretch;
+    background: var(--cel-green);
+    background-image: url("../assets/ui/fond_cadrille.jpg");
+    background-blend-mode: overlay;
+    padding: 8px;
+    gap: 8px;
+    border-bottom: 3px solid var(--cel-orange);
+
+    .actor-portrait {
+      width: 80px;
+      height: 80px;
+      object-fit: cover;
+      border: 2px solid var(--cel-orange);
+      cursor: pointer;
+    }
+
+    .header-fields {
+      flex: 1;
+      display: flex;
+      flex-direction: column;
+      gap: 4px;
+      color: var(--cel-cream);
+
+      input[type="text"] {
+        background: transparent;
+        border: none;
+        border-bottom: 1px solid var(--cel-orange-light);
+        color: var(--cel-orange);
+        font-family: var(--cel-font-title);
+        font-size: 1.4em;
+        font-weight: bold;
+        padding: 2px 4px;
+        &::placeholder { color: var(--cel-orange-light); }
+      }
+
+      .actor-name {
+        font-family: var(--cel-font-title);
+        font-size: 1.4em;
+        color: var(--cel-orange);
+        margin: 0;
+      }
+
+      .concept-display,
+      input[name="system.concept"] {
+        font-style: italic;
+        font-size: 0.9em;
+        color: var(--cel-cream);
+        background: transparent;
+        border-bottom: 1px solid rgba(255,255,255,0.3);
+      }
+    }
+
+    .header-stats-row {
+      display: flex;
+      gap: 12px;
+      align-items: center;
+
+      .header-stat {
+        display: flex;
+        flex-direction: column;
+        align-items: center;
+        background: rgba(0,0,0,0.3);
+        border: 1px solid var(--cel-orange);
+        border-radius: 4px;
+        padding: 4px 8px;
+
+        label {
+          font-size: 0.65em;
+          text-transform: uppercase;
+          color: var(--cel-orange-light);
+        }
+
+        .stat-value {
+          font-size: 1.4em;
+          font-family: var(--cel-font-title);
+          color: var(--cel-orange);
+          font-weight: bold;
+        }
+      }
+    }
+  }
+
+  // ─── Tabs ────────────────────────────────────────────────────────────────
+
+  .sheet-tabs {
+    display: flex;
+    background: var(--cel-green-dark);
+    padding: 0;
+    border-bottom: 2px solid var(--cel-orange);
+
+    .item {
+      padding: 6px 12px;
+      color: var(--cel-cream);
+      font-family: var(--cel-font-title);
+      font-size: 0.85em;
+      text-transform: uppercase;
+      letter-spacing: 0.05em;
+      cursor: pointer;
+      border-right: 1px solid var(--cel-green-light);
+      transition: background 0.2s;
+
+      &:hover { background: var(--cel-green-light); }
+      &.active {
+        background: var(--cel-orange);
+        color: #1a0a00;
+        font-weight: bold;
+      }
+    }
+  }
+
+  // ─── Sheet body / tabs content ───────────────────────────────────────────
+
+  .sheet-body {
+    flex: 1;
+    overflow-y: auto;
+    padding: 8px;
+  }
+
+  .tab { display: none; &.active { display: block; } }
+}