Fix lint errors, upgrade react-simple-maps to v5 (clears high vuln), My Notes: search other studies + Markdown download; v2.42.2

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.42.1",
+  "version": "2.42.2",
   "type": "module",
   "scripts": {
     "dev": "vite",
@@ -38,7 +38,7 @@
     "react-dom": "^19.2.4",
     "react-markdown": "^10.1.0",
     "react-router-dom": "^7.13.1",
-    "react-simple-maps": "^3.0.0",
+    "react-simple-maps": "^5.0.5",
     "remark-gfm": "^4.0.1",
     "resend": "^6.10.0",
     "tar": "^7.5.19"