feat: add HEZ/DOT pool support and fix user-facing token names

- Add HEZ/DOT pool to PoolDashboard
- Display DOT, ETH, BTC instead of wDOT, wETH, wBTC to users
- Update priceOracle with correct symbol mappings
- Fix lint errors in check_all_pools.mjs
- Extract MINTABLE_ASSETS to separate file for fast refresh

shared/lib/priceOracle.ts

@@ -7,10 +7,9 @@ const COINGECKO_API = 'https://api.coingecko.com/api/v3';
 
 // CoinGecko ID mappings
 export const COINGECKO_IDS: Record<string, string> = {
-  'wDOT': 'polkadot',
-  'wETH': 'ethereum',
-  'wBTC': 'bitcoin',
-  'wUSDT': 'tether',
+  'DOT': 'polkadot',
+  'ETH': 'ethereum',
+  'BTC': 'bitcoin',
   'USDT': 'tether',
 };