Initial Drupal site: content model + validation + Vue dashboard

- Content type "Ligne comptable" with Paragraphs "Répartition" (Compte + Montant)
- Taxonomies: Compte (9 comptes) and Client (unified client list)
- hook_node_presave + form validate: sum(répartition) must equal montant HT
- /dashboard route (progressive decoupling): Vue 3 app fetching JSON:API,
  computing solde par compte / par client client-side
- "Ajouter une ligne" opens the real Drupal node form in an AJAX modal
- Gin as default + admin theme
- 9 opening-balance lines seeded from suivi_compta_SASFigli2026_v2.ods

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

web/modules/custom/figli_compta_ledger/css/dashboard.css

@@ -0,0 +1,56 @@
+#figli-dashboard-app {
+  font-family: var(--gin-font-family, Inter, -apple-system, sans-serif);
+  max-width: 1200px;
+  margin: 1rem 0;
+}
+
+#figli-dashboard-app h2 {
+  font-size: 1.25rem;
+  font-weight: 600;
+  margin: 2rem 0 0.75rem;
+}
+
+#figli-dashboard-app .figli-note {
+  color: var(--gin-color-text-light, #6b7280);
+  font-size: 0.875rem;
+  margin-bottom: 1rem;
+}
+
+#figli-dashboard-app table {
+  width: 100%;
+  border-collapse: collapse;
+  background: var(--gin-bg-layer2, #fff);
+  border: 1px solid var(--gin-border-color, #dcdee2);
+  border-radius: 6px;
+  overflow: hidden;
+}
+
+#figli-dashboard-app th,
+#figli-dashboard-app td {
+  text-align: left;
+  padding: 0.5rem 0.85rem;
+  border-bottom: 1px solid var(--gin-border-color, #eceef1);
+}
+
+#figli-dashboard-app th {
+  background: var(--gin-bg-layer, #f5f6f8);
+  font-weight: 600;
+  font-size: 0.85rem;
+}
+
+#figli-dashboard-app td.amount {
+  text-align: right;
+  font-variant-numeric: tabular-nums;
+}
+
+#figli-dashboard-app tr.positive td.amount { color: #1a7f37; }
+#figli-dashboard-app tr.negative td.amount { color: #c9312b; }
+#figli-dashboard-app tr.total td { font-weight: 700; border-top: 2px solid var(--gin-border-color, #333); }
+
+#figli-dashboard-app .figli-error {
+  background: #fde8e8;
+  border: 1px solid #f4a3a3;
+  color: #7a1a1a;
+  padding: 0.75rem 1rem;
+  border-radius: 6px;
+}