feat: add map framing save button and prevent initial load save

- Add "Définir le cadrage" button in multi mode to save current map
  center and zoom as default framing
- Add getCurrentZoom() method in MapPreview to retrieve current zoom level
- Fix: prevent automatic save on initial load with isInitialLoad flag
  to avoid marking page as modified when loading existing data
- Style: dark button theme for save framing button

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

public/site/plugins/map-editor/src/components/field/MapEditor.vue

@@ -17,6 +17,17 @@
 
         <!-- Map preview -->
         <div class="map-preview-container">
+          <!-- Save framing button (multi mode only) -->
+          <button
+            v-if="mode === 'multi'"
+            class="save-framing-button"
+            type="button"
+            @click="saveCurrentFraming"
+            title="Utiliser le niveau de zoom et centrage actuel comme cadrage par défaut"
+          >
+            Définir le cadrage
+          </button>
+
           <MapPreview
             v-if="mapReady"
             ref="mapPreview"
@@ -100,6 +111,7 @@ export default {
     const mapReady = ref(false);
     const mapPreview = ref(null);
     const selectedMarkerId = ref(null);
+    const isInitialLoad = ref(true);
 
     // Extract page ID from field name
     // For single mode, we don't need the API
@@ -132,14 +144,15 @@ export default {
         ? useMarkersApi(pageId.value)
         : { markers: ref([]), loading: ref(false), error: ref(null) };
 
-    const { center, zoom, loadMapData, debouncedSave } = useMapData({
-      defaultCenter: {
-        lat: props.defaultCenter[0],
-        lon: props.defaultCenter[1],
-      },
-      defaultZoom: props.defaultZoom,
-      onSave: (yamlString) => emit('input', yamlString),
-    });
+    const { center, zoom, loadMapData, saveMapData, debouncedSave } =
+      useMapData({
+        defaultCenter: {
+          lat: props.defaultCenter[0],
+          lon: props.defaultCenter[1],
+        },
+        defaultZoom: props.defaultZoom,
+        onSave: (yamlString) => emit('input', yamlString),
+      });
 
     // Computed: markers based on mode
     const markers = computed(() => {
@@ -290,13 +303,19 @@ export default {
 
       await nextTick();
       mapReady.value = true;
+
+      // Mark initial load as complete
+      // Use nextTick to ensure all reactive updates from loadMapData are done
+      await nextTick();
+      isInitialLoad.value = false;
     });
 
     // Watch center and zoom for automatic save (multi mode only)
     watch(
       [center, zoom],
       () => {
-        if (props.mode === 'multi') {
+        // Don't save during initial load to avoid marking page as modified
+        if (props.mode === 'multi' && !isInitialLoad.value) {
           debouncedSave();
         }
       },
@@ -484,6 +503,32 @@ export default {
       }
     }
 
+    /**
+     * Save current map framing (center + zoom)
+     */
+    function saveCurrentFraming() {
+      if (!mapPreview.value) return;
+
+      // Get current center and zoom from the map
+      const currentCenter = mapPreview.value.getCurrentCenter
+        ? mapPreview.value.getCurrentCenter()
+        : { lat: center.value.lat, lon: center.value.lon };
+
+      const currentZoom = mapPreview.value.getCurrentZoom
+        ? mapPreview.value.getCurrentZoom()
+        : zoom.value;
+
+      // Update state
+      center.value = {
+        lat: currentCenter.lat,
+        lon: currentCenter.lon,
+      };
+      zoom.value = currentZoom;
+
+      // Save immediately (not debounced)
+      saveMapData();
+    }
+
     return {
       // State
       center,
@@ -504,6 +549,7 @@ export default {
       handleLocationSelect,
       deleteMarker,
       editMarker,
+      saveCurrentFraming,
     };
   },
 };
@@ -537,4 +583,29 @@ export default {
   background: #f0f0f0;
   min-width: 0;
 }
+
+.save-framing-button {
+  position: absolute;
+  top: 10px;
+  right: 10px;
+  z-index: 1000;
+  padding: 8px 16px;
+  background: var(--color-black);
+  border: 1px solid var(--color-border);
+  border-radius: var(--rounded);
+  font-size: 13px;
+  font-weight: 500;
+  cursor: pointer;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+  transition: all 0.2s;
+}
+
+.save-framing-button:hover {
+  background: var(--color-gray-700);
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
+}
+
+.save-framing-button:active {
+  transform: translateY(1px);
+}
 </style>

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

@@ -309,6 +309,13 @@ export default {
       };
     }
 
+    function getCurrentZoom() {
+      if (map.value && map.value.loaded()) {
+        return map.value.getZoom();
+      }
+      return props.zoom;
+    }
+
     function centerOnPosition(lat, lon) {
       if (map.value && map.value.loaded()) {
         map.value.flyTo({
@@ -323,6 +330,7 @@ export default {
       mapContainer,
       loading,
       getCurrentCenter,
+      getCurrentZoom,
       centerOnPosition
     };
   }