Prune scaffold cruft: unused Next.js template SVGs and axios dep

Removed five default Next.js scaffold SVGs from public/ that were
created by create-next-app and never referenced (file.svg, globe.svg,
next.svg, vercel.svg, window.svg). The actual brand mark
public/fci-logo.png is the only image the app uses.

Removed axios from dependencies — the app uses native fetch
everywhere, and axios hasn't been imported since the initial
scaffolding pass. Lockfile regenerated; build verified clean.

package.json

@@ -9,7 +9,6 @@
     "lint": "eslint"
   },
   "dependencies": {
-    "axios": "^1.16.0",
     "next": "16.2.6",
     "react": "19.2.4",
     "react-dom": "19.2.4",