feat: RLA API v1.0.0 — API complète + exports + thème McKinsey

- 9 endpoints métier : synthese, alertes, en-service, en-cours,
  par-region, clotures, pilotage-proactif, matrice-risque
- Exports PDF (tous rôles) / XLSX PPTX DOCX (superadmin)
- services/calc.js : helpers normalisés partagés
- services/export-pdf.js : PDF async PDFKit par vue
- Thème McKinsey (#1C2B4B / bleu pétrole / gris sobre)
- Boutons XLSX/DOCX front (superadmin uniquement)
- BASEROW_API_URL → https://baserow.bolbol.tn/api/
- dotenv override: true

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

data/users.json

@@ -0,0 +1,23 @@
+[
+  {
+    "id": 1,
+    "username": "nabil",
+    "password": "$2a$10$eQjI1sdYu4hgDnO3TanageD3/R.JqdWqAfzPVD4TxSW0Tjit0x8hu",
+    "role": "superadmin",
+    "region": "all"
+  },
+  {
+    "id": 2,
+    "username": "admin",
+    "password": "$2a$10$CbmqfDC8gYg0oOzGD7T2seIWQf1.vQQQSsSQbvVjkwOybmtogTTzS",
+    "role": "admin",
+    "region": "all"
+  },
+  {
+    "id": 3,
+    "username": "ikram",
+    "password": "$2a$10$pDeN2gaPE3GGXtScS.k9l.PAj99.Cxa637AbVrOlI7HbO9Cd4H2NW",
+    "role": "admin",
+    "region": "all"
+  }
+]