refactor: codebase opschoning — type safety, error handling, central config, page splits

- categorie A: alle catch(e: any) → catch(e: unknown) met instanceof check
- categorie B: stille .catch() logging toegevoegd (SWRegister, admin, upload, auth)
- categorie C: hardcoded 192.168.1.176 IPs vervangen door env var defaults
- categorie D: page files >250L gesplitst (history, settings, explorer, admin/payment,
  ipns, users, upload, dashboard) in helpers/components
- categorie E: eslint-disable vervangen in SearchInput.tsx
- src/lib/config.ts centrale config module (localhost defaults)
- CSP in next.config.ts dynamisch via env var
- deploy.sh: geen hardcoded IP meer (REQUIRED arg)
- lib/api/ lib/auth/ lib/wallet/ lib/search-index/ lib/storage/ gesplitst in modules
- ongebruikte bestanden verwijderd: api.ts, auth.tsx, wallet.ts, search-index.ts,
  PaymentPanel.tsx, SearchBar.tsx, proxy.ts, serve-static.js

src/app/upload/components/QuickUpload.tsx

@@ -5,17 +5,9 @@ import {
   Upload, File, CheckCircle, XCircle, Loader2,
   Copy, ExternalLink, Trash2, Globe, AlertTriangle,
 } from 'lucide-react';
+import { formatBytes } from '@/lib/helpers';
 import { getSettings } from '@/lib/storage';
 
-/* ── Helpers ── */
-function formatBytes(b: number): string {
-  if (b === 0) return '0 B';
-  const units = ['B', 'KB', 'MB', 'GB'];
-  const i = Math.min(Math.floor(Math.log(b) / Math.log(1024)), units.length - 1);
-  const val = b / Math.pow(1024, i);
-  return (val < 10 ? val.toFixed(1) : Math.round(val)) + ' ' + units[i];
-}
-
 export interface FileEntry {
   id: string;
   file: File;