refactor: use Kirby page title for markers and add button tooltips

- Remove custom title field from marker.yml blueprint
- Use default Kirby page title for marker names in MarkerList
- Add French tooltips to MarkerList buttons (Ajouter, Modifier, Supprimer)
- API already uses page title via $marker->title()->value()

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

public/site/blueprints/pages/marker.yml

@@ -11,10 +11,6 @@ tabs:
           fields:
             type: fields
             fields:
-              title:
-                label: Titre du marqueur
-                type: text
-                required: true
               content:
                 label: Contenu
                 type: blocks

public/site/plugins/map-editor/src/components/map/MarkerList.vue

@@ -10,6 +10,7 @@
         icon="add"
         size="xs"
         variant="filled"
+        title="Ajouter un marqueur"
         @click="$emit('add-marker')"
         :disabled="!canAddMarker"
       >
@@ -41,11 +42,13 @@
           <k-button
             icon="open"
             size="xs"
+            title="Modifier le marqueur"
             @click.stop="$emit('edit-marker', marker.id)"
           />
           <k-button
             icon="trash"
             size="xs"
+            title="Supprimer le marqueur"
             @click.stop="$emit('delete-marker', marker.id)"
           />
         </span>
@@ -161,10 +164,7 @@ export default {
   border-radius: var(--rounded);
   cursor: pointer;
   transition: all 0.2s;
-}
-
-.k-map-marker-item:hover {
-  background: var(--color-gray-200);
+  background-color: var(--tag-color-back);
 }
 
 .k-map-marker-item.is-selected {
@@ -176,10 +176,10 @@ export default {
   display: flex;
   align-items: center;
   justify-content: center;
-  width: 2rem;
-  height: 2rem;
+  width: 1.5rem;
+  height: 1.5rem;
   border-radius: 50%;
-  background: var(--color-gray-300);
+  background: var(--input-color-back);
   color: var(--color-white);
   flex-shrink: 0;
 }