feat(app): add studentOnly pages and new routes

Add routes for modules, users, notes import, recap, and islands edit.
Update middleware to filter pages based on user role.

feat(admin): add modal for assigning teaching, replace delete icon with SVG

refactor(server): rename port variable to uppercase and add env support
feat(admin): add enseignants, users, filtering and role colors

refactor(AdminRoles): improve role UI and add permission mapping

feat(admin-users): add role colors, role filter, and modal for creating users

feat(admin): add EditModule component for module editing

feat(admin): add EditUser page for editing users and managing enseignements

feat(promo-select): display id and name in options for promo dropdown

feat: add edit module/user routes, inline coeff editing, UI tweaks

refactor: UI – icons, modal overlay, grid, subtitles, import margin

routes/(apps)/students/(_islands)/AdminPromotions.tsx

@@ -25,7 +25,7 @@ export default function AdminPromotions() {
   const [anneeSco, setAnneeSco] = useState("");
 
   const generatedId = anneeSco.trim()
-    ? `${selectedAnnee}${selectedFiliere}${anneeSco.trim()}`
+    ? `${selectedAnnee}${selectedFiliere}${anneeSco.trim().replace(/\//g, "-")}`
     : "";
 
   async function load() {
@@ -101,7 +101,7 @@ export default function AdminPromotions() {
       <div class="promo-builder">
         <p class="promo-builder-title">Créer une promotion</p>
         <p class="promo-builder-subtitle">
-          POST /promotions – idPromo est généré automatiquement
+          idPromo est généré automatiquement
         </p>
 
         <div class="promo-builder-row">
@@ -141,7 +141,7 @@ export default function AdminPromotions() {
             <label>Année scolaire</label>
             <input
               class="form-input"
-              placeholder="ex: 25/26, 24/27…"
+              placeholder="ex: 25-26, 24-27…"
               value={anneeSco}
               onInput={(e) => setAnneeSco((e.target as HTMLInputElement).value)}
               style="min-width: 9rem"
@@ -220,7 +220,18 @@ export default function AdminPromotions() {
                             class="btn btn-sm btn-danger"
                             onClick={() => deletePromo(p.id)}
                           >
-                            🗑
+                            <svg
+                              width="14"
+                              height="14"
+                              viewBox="0 0 24 24"
+                              fill="none"
+                              stroke="currentColor"
+                              stroke-width="2"
+                            >
+                              <path d="M3 6h18" />
+                              <path d="M8 6V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2" />
+                              <rect x="5" y="6" width="14" height="16" rx="1" />
+                            </svg>
                           </button>
                         </td>
                       </tr>