feat(frontend): align wUSDT Asset ID with SDK (1000)

This commit aligns the frontend wUSDT implementation with the SDK runtime
constants, ensuring consistency across the entire stack.

Changes:
- Update ASSET_IDS.WUSDT from 2 → 1000 (matches SDK constants)
- Add ASSET_CONFIGS with wUSDT configuration (6 decimals, min balance)
- Update all asset queries in AccountBalance.tsx to use ASSET_IDS.WUSDT
- Update pool queries for wHEZ/wUSDT and PEZ/wUSDT pools
- Update USDTBridge.tsx burn transaction to use ASSET_IDS.WUSDT
- Refactor usdt.ts to reference ASSET_CONFIGS instead of hardcoded values

Asset ID Allocation Strategy:
- 0-999: Reserved for protocol tokens (wHEZ, PEZ, etc.)
- 1000+: Bridged/wrapped external assets (wUSDT, etc.)

Technical Details:
- wUSDT uses 6 decimals (USDT standard), not 12 like native HEZ
- All frontend code now uses centralized ASSET_CONFIGS
- ESLint passes with 0 errors (8 pre-existing warnings unrelated to changes)

This is part of Phase 1 wUSDT infrastructure setup, working in parallel
with SDK benchmarking builds currently running in background.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

shared/lib/usdt.ts

@@ -4,15 +4,15 @@
 // Handles wUSDT minting, burning, and reserve management
 
 import type { ApiPromise } from '@polkadot/api';
-import { ASSET_IDS } from './wallet';
+import { ASSET_IDS, ASSET_CONFIGS } from './wallet';
 import { getMultisigMembers, createMultisigTx } from './multisig';
 
 // ========================================
 // CONSTANTS
 // ========================================
 
-export const WUSDT_ASSET_ID = ASSET_IDS.WUSDT;
-export const WUSDT_DECIMALS = 6; // USDT has 6 decimals
+export const WUSDT_ASSET_ID = ASSET_CONFIGS.WUSDT.id;
+export const WUSDT_DECIMALS = ASSET_CONFIGS.WUSDT.decimals;
 
 // Withdrawal limits and timeouts
 export const WITHDRAWAL_LIMITS = {

shared/lib/wallet.ts

@@ -31,16 +31,47 @@ export const CHAIN_CONFIG = {
 // ========================================
 // ⚠️ IMPORTANT: HEZ is the native token and does NOT have an Asset ID
 // Only wrapped/asset tokens are listed here
+//
+// Asset ID Allocation:
+// - 0-999: Reserved for protocol tokens (wHEZ, PEZ, etc.)
+// - 1000+: Bridged/wrapped external assets (wUSDT, etc.)
 export const ASSET_IDS = {
   WHEZ: parseInt(import.meta.env.VITE_ASSET_WHEZ || '0'),  // Wrapped HEZ
   PEZ: parseInt(import.meta.env.VITE_ASSET_PEZ || '1'),    // PEZ utility token
-  WUSDT: parseInt(import.meta.env.VITE_ASSET_WUSDT || '2'), // Wrapped USDT (multisig backed)
+  WUSDT: parseInt(import.meta.env.VITE_ASSET_WUSDT || '1000'), // Wrapped USDT (6 decimals, matches SDK)
   USDT: parseInt(import.meta.env.VITE_ASSET_USDT || '3'),
   BTC: parseInt(import.meta.env.VITE_ASSET_BTC || '4'),
   ETH: parseInt(import.meta.env.VITE_ASSET_ETH || '5'),
   DOT: parseInt(import.meta.env.VITE_ASSET_DOT || '6'),
 } as const;
 
+// ========================================
+// ASSET CONFIGURATIONS
+// ========================================
+export const ASSET_CONFIGS = {
+  WHEZ: {
+    id: ASSET_IDS.WHEZ,
+    symbol: 'wHEZ',
+    name: 'Wrapped HEZ',
+    decimals: 12,
+    minBalance: 1_000_000_000, // 0.001 HEZ
+  },
+  PEZ: {
+    id: ASSET_IDS.PEZ,
+    symbol: 'PEZ',
+    name: 'PEZ Utility Token',
+    decimals: 12,
+    minBalance: 1_000_000_000, // 0.001 PEZ
+  },
+  WUSDT: {
+    id: ASSET_IDS.WUSDT,
+    symbol: 'wUSDT',
+    name: 'Wrapped USDT',
+    decimals: 6, // ⚠️ CRITICAL: wUSDT uses 6 decimals (USDT standard), not 12!
+    minBalance: 1_000, // 0.001 USDT
+  },
+} as const;
+
 // ========================================
 // EXPLORER URLS
 // ========================================