feat: import wallet support, HYPE tracking, bug fixes

- Fix pollVerifiedWallets: route import wallets to /wallet endpoint and reconstruct running-balance ledger
- Fix generateRandomAddress: append 'IMPORT' suffix to prevent fake EVM addresses
- Add import chain: CSV upload via multipart, IMPORT_ONLY wallet registration
- Add HYPE summary cards with holdings, PnL, avg buy price, total invested
- Add BTC and SATS to TOKENS config
- Add backend DELETE on wallet removal (skip for import wallets)
- Fix chain name: hyperliquide → hyperevm (chainId 999)
- Add HSTS and security headers to nginx config

default.conf

@@ -1,12 +1,19 @@
 server {
     listen 80;
+
+    add_header Strict-Transport-Security "max-age=31536000" always;
+    add_header X-Content-Type-Options "nosniff" always;
+
     location / {
         root /usr/share/nginx/html;
         index index.html;
     }
+
     location /api/ {
         proxy_pass http://192.168.1.102:8000/api/;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-Proto https;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     }
 }