fix: fix broken images from CSP, remove dead code, upgrade React types

- Add ciphera.net and *.gstatic.com to CSP img-src (fixes app switcher
  icons and site favicons blocked by Content Security Policy)
- Delete 6 unused component/utility files and orphaned test
- Upgrade @types/react and @types/react-dom to v19 (matches React 19 runtime)
- Fix logger test to use vi.stubEnv for React 19 type compatibility

package.json

@@ -50,8 +50,8 @@
     "@testing-library/react": "^16.3.2",
     "@types/d3-scale": "^4.0.9",
     "@types/node": "^20.14.12",
-    "@types/react": "^18.3.3",
-    "@types/react-dom": "^18.3.0",
+    "@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",