Replace WorldMap with Magic UI DottedMap for visitor locations

- New DottedMap component using svg-dotted-map with country centroid markers
- Marker size scales by pageview proportion (brand orange)
- Static country-centroids.ts lookup (~200 ISO codes)
- Remove react-simple-maps, i18n-iso-countries, world-atlas CDN dependency

package.json

@@ -23,7 +23,6 @@
     "d3-scale": "^4.0.2",
     "framer-motion": "^12.23.26",
     "html-to-image": "^1.11.13",
-    "i18n-iso-countries": "^7.14.0",
     "iso-3166-2": "^1.0.0",
     "jspdf": "^4.0.0",
     "jspdf-autotable": "^5.0.7",
@@ -31,9 +30,9 @@
     "react": "^19.2.3",
     "react-dom": "^19.2.3",
     "react-markdown": "^10.1.0",
-    "react-simple-maps": "^3.0.0",
     "recharts": "^2.15.0",
     "sonner": "^2.0.7",
+    "svg-dotted-map": "^2.0.1",
     "swr": "^2.3.3",
     "xlsx": "^0.18.5"
   },
@@ -51,7 +50,6 @@
     "@types/node": "^20.14.12",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
-    "@types/react-simple-maps": "^3.0.6",
     "@vitejs/plugin-react": "^5.1.4",
     "autoprefixer": "^10.4.19",
     "eslint": "^9.39.2",