Carte : remplace Leaflet CDN par bundle Vite local

Le CDN unpkg.com échoue si le serveur n'a pas accès à Internet.
- npm install leaflet
- resources/js/carte.js : point d'entrée qui importe Leaflet + expose window.LeafletMap
- vite.config.js : ajoute carte.js aux inputs compilés
- carte/index.blade.php : @vite au lieu du CDN, utilise window.LeafletMap

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

package-lock.json

@@ -4,6 +4,9 @@
     "requires": true,
     "packages": {
         "": {
+            "dependencies": {
+                "leaflet": "^1.9.4"
+            },
             "devDependencies": {
                 "@tailwindcss/forms": "^0.5.2",
                 "@tailwindcss/vite": "^4.0.0",
@@ -2276,6 +2279,12 @@
                 "vite": "^7.0.0"
             }
         },
+        "node_modules/leaflet": {
+            "version": "1.9.4",
+            "resolved": "https://registry.npmjs.org/leaflet/-/leaflet-1.9.4.tgz",
+            "integrity": "sha512-nxS1ynzJOmOlHp+iL3FyWqK89GtNL8U8rvlMOsQdTTssxZwCXh8N2NB3GDQOL+YR3XnWyZAxwQixURb+FA74PA==",
+            "license": "BSD-2-Clause"
+        },
         "node_modules/lightningcss": {
             "version": "1.32.0",
             "resolved": "https://registry.npmjs.org/lightningcss/-/lightningcss-1.32.0.tgz",