feat(renderer): interactive map with Leaflet + OpenStreetMap (M10.3)

- MapRenderer.vue: lazy-loads Leaflet, renders OSM tiles
- Orange marker pins for all places with coordinates
- Place list sidebar on desktop, popup on click
- "View on map" button in chat messages with places
- Integrated into content panel via openMapView()

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

packages/app/src/components/content/ContentPanel.vue

@@ -99,6 +99,11 @@
             :title="pdfUrl.title"
             @back="closePdfViewer"
           />
+          <MapRenderer
+            v-else-if="mapPlaces.length > 0"
+            :places="mapPlaces"
+            @back="closeMapView"
+          />
 
           <!-- Grid views by active tab -->
           <component
@@ -184,6 +189,7 @@ import NewsGrid from './NewsGrid.vue'
 import ArticleDetail from './ArticleDetail.vue'
 import ArticleReader from '@/components/renderers/ArticleReader.vue'
 import PdfViewer from '@/components/renderers/PdfViewer.vue'
+import MapRenderer from '@/components/renderers/MapRenderer.vue'
 import MagazineGrid from './MagazineGrid.vue'
 import ProjectGrid from './ProjectGrid.vue'
 import NostrGrid from './NostrGrid.vue'
@@ -236,11 +242,13 @@ const {
   closeLongFormArticle,
   pdfUrl,
   closePdfViewer,
+  mapPlaces,
+  closeMapView,
   closePanel,
 } = useContentPanel()
 
 const hasDetailOpen = computed(() =>
-  !!(selectedFilm.value || selectedBook.value || selectedTVSeries.value || selectedSong.value || selectedPodcast.value || selectedArticle.value || selectedDesignSystemItem.value || longFormArticle.value || pdfUrl.value)
+  !!(selectedFilm.value || selectedBook.value || selectedTVSeries.value || selectedSong.value || selectedPodcast.value || selectedArticle.value || selectedDesignSystemItem.value || longFormArticle.value || pdfUrl.value || mapPlaces.value.length > 0)
 )
 
 const windowWidth = ref(window.innerWidth)