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/components/SWRegister.tsx

@@ -9,8 +9,8 @@ import { useEffect } from 'react';
 export default function SWRegister() {
   useEffect(() => {
     if ('serviceWorker' in navigator) {
-      navigator.serviceWorker.register('/sw.js').catch(() => {
-        // SW registratie mislukt — geen offline, app werkt gewoon
+      navigator.serviceWorker.register('/sw.js').catch((err) => {
+        console.error('[SWRegister] Registration failed:', err);
       });
     }
   }, []);