feat: reorganize wallet dashboard and add blockchain token lookup

- Move Recent Activity and NFTs to left column
- Move token balances to right column under action buttons
- Add Token modal now fetches asset info from blockchain
- Shows symbol, name, decimals before adding
- Search by asset ID with Enter key support

web/src/components/AddTokenModal.tsx

@@ -9,7 +9,16 @@ import {
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
-import { AlertCircle } from 'lucide-react';
+import { AlertCircle, Search, CheckCircle, Loader2 } from 'lucide-react';
+import { usePezkuwi } from '@/contexts/PezkuwiContext';
+
+interface TokenInfo {
+  assetId: number;
+  symbol: string;
+  name: string;
+  decimals: number;
+  exists: boolean;
+}
 
 interface AddTokenModalProps {
   isOpen: boolean;
@@ -22,95 +31,226 @@ export const AddTokenModal: React.FC<AddTokenModalProps> = ({
   onClose,
   onAddToken,
 }) => {
+  const { assetHubApi, isAssetHubReady } = usePezkuwi();
   const [assetId, setAssetId] = useState('');
   const [error, setError] = useState('');
-  const [isLoading, setIsLoading] = useState(false);
+  const [isSearching, setIsSearching] = useState(false);
+  const [isAdding, setIsAdding] = useState(false);
+  const [tokenInfo, setTokenInfo] = useState<TokenInfo | null>(null);
 
-  const handleSubmit = async (e: React.FormEvent) => {
-    e.preventDefault();
+  // Helper to decode hex string to UTF-8
+  const hexToString = (hex: string): string => {
+    if (!hex || hex === '0x') return '';
+    try {
+      const hexStr = hex.startsWith('0x') ? hex.slice(2) : hex;
+      const bytes = new Uint8Array(hexStr.match(/.{1,2}/g)?.map(byte => parseInt(byte, 16)) || []);
+      return new TextDecoder('utf-8').decode(bytes).replace(/\0/g, '');
+    } catch {
+      return '';
+    }
+  };
+
+  const handleSearch = async () => {
     setError('');
+    setTokenInfo(null);
 
     const id = parseInt(assetId);
     if (isNaN(id) || id < 0) {
-      setError('Please enter a valid asset ID (number)');
+      setError('Please enter a valid asset ID (positive number)');
       return;
     }
 
-    setIsLoading(true);
+    if (!assetHubApi || !isAssetHubReady) {
+      setError('Asset Hub connection not ready. Please wait...');
+      return;
+    }
+
+    setIsSearching(true);
     try {
-      await onAddToken(id);
-      setAssetId('');
-      setError('');
-    } catch {
-      setError('Failed to add token. Please check the asset ID and try again.');
+      // Check if asset exists
+      const assetInfo = await assetHubApi.query.assets.asset(id);
+
+      if (!assetInfo || assetInfo.isNone) {
+        setError(`Asset #${id} not found on blockchain`);
+        setIsSearching(false);
+        return;
+      }
+
+      // Get asset metadata
+      const metadata = await assetHubApi.query.assets.metadata(id);
+      const metaJson = metadata.toJSON() as { symbol?: string; name?: string; decimals?: number };
+
+      // Decode hex strings
+      let symbol = metaJson.symbol || '';
+      let name = metaJson.name || '';
+
+      if (typeof symbol === 'string' && symbol.startsWith('0x')) {
+        symbol = hexToString(symbol);
+      }
+      if (typeof name === 'string' && name.startsWith('0x')) {
+        name = hexToString(name);
+      }
+
+      // Fallback if no metadata
+      if (!symbol) symbol = `Asset #${id}`;
+      if (!name) name = `Unknown Asset`;
+
+      setTokenInfo({
+        assetId: id,
+        symbol: symbol.trim(),
+        name: name.trim(),
+        decimals: metaJson.decimals || 12,
+        exists: true,
+      });
+    } catch (err) {
+      console.error('Failed to fetch asset:', err);
+      setError('Failed to fetch asset from blockchain');
     } finally {
-      setIsLoading(false);
+      setIsSearching(false);
+    }
+  };
+
+  const handleAdd = async () => {
+    if (!tokenInfo) return;
+
+    setIsAdding(true);
+    try {
+      await onAddToken(tokenInfo.assetId);
+      handleClose();
+    } catch {
+      setError('Failed to add token');
+    } finally {
+      setIsAdding(false);
     }
   };
 
   const handleClose = () => {
     setAssetId('');
     setError('');
+    setTokenInfo(null);
     onClose();
   };
 
+  const handleKeyPress = (e: React.KeyboardEvent) => {
+    if (e.key === 'Enter') {
+      e.preventDefault();
+      handleSearch();
+    }
+  };
+
   return (
     <Dialog open={isOpen} onOpenChange={handleClose}>
       <DialogContent className="bg-gray-900 border-gray-800 text-white sm:max-w-md">
         <DialogHeader>
           <DialogTitle className="text-xl">Add Custom Token</DialogTitle>
           <DialogDescription className="text-gray-400">
-            Enter the asset ID of the token you want to track.
-            Note: Core tokens (HEZ, PEZ) are already displayed separately.
+            Enter the asset ID to fetch token details from blockchain.
           </DialogDescription>
         </DialogHeader>
 
-        <form onSubmit={handleSubmit} className="space-y-4 mt-4">
+        <div className="space-y-4 mt-4">
+          {/* Search Input */}
           <div className="space-y-2">
             <Label htmlFor="assetId" className="text-sm text-gray-300">
               Asset ID
             </Label>
-            <Input
-              id="assetId"
-              type="number"
-              value={assetId}
-              onChange={(e) => setAssetId(e.target.value)}
-              placeholder="e.g., 3"
-              className="bg-gray-800 border-gray-700 text-white placeholder:text-gray-500"
-              min="0"
-              required
-            />
+            <div className="flex gap-2">
+              <Input
+                id="assetId"
+                type="number"
+                value={assetId}
+                onChange={(e) => {
+                  setAssetId(e.target.value);
+                  setTokenInfo(null);
+                  setError('');
+                }}
+                onKeyPress={handleKeyPress}
+                placeholder="e.g., 1001"
+                className="bg-gray-800 border-gray-700 text-white placeholder:text-gray-500 flex-1"
+                min="0"
+              />
+              <Button
+                type="button"
+                onClick={handleSearch}
+                disabled={isSearching || !assetId}
+                className="bg-cyan-600 hover:bg-cyan-700"
+              >
+                {isSearching ? (
+                  <Loader2 className="h-4 w-4 animate-spin" />
+                ) : (
+                  <Search className="h-4 w-4" />
+                )}
+              </Button>
+            </div>
             <p className="text-xs text-gray-500">
-              Each token on the network has a unique asset ID
+              Known assets: 1001 (DOT), 1002 (ETH), 1003 (BTC)
             </p>
           </div>
 
+          {/* Token Info Display */}
+          {tokenInfo && (
+            <div className="p-4 bg-gray-800/50 border border-green-500/30 rounded-lg">
+              <div className="flex items-center gap-3 mb-3">
+                <CheckCircle className="h-5 w-5 text-green-400" />
+                <span className="text-green-400 font-medium">Token Found!</span>
+              </div>
+              <div className="space-y-2 text-sm">
+                <div className="flex justify-between">
+                  <span className="text-gray-400">Symbol:</span>
+                  <span className="text-white font-semibold">{tokenInfo.symbol}</span>
+                </div>
+                <div className="flex justify-between">
+                  <span className="text-gray-400">Name:</span>
+                  <span className="text-white">{tokenInfo.name}</span>
+                </div>
+                <div className="flex justify-between">
+                  <span className="text-gray-400">Decimals:</span>
+                  <span className="text-white">{tokenInfo.decimals}</span>
+                </div>
+                <div className="flex justify-between">
+                  <span className="text-gray-400">Asset ID:</span>
+                  <span className="text-white font-mono">#{tokenInfo.assetId}</span>
+                </div>
+              </div>
+            </div>
+          )}
+
+          {/* Error Display */}
           {error && (
             <div className="flex items-center gap-2 p-3 bg-red-500/10 border border-red-500/20 rounded-md">
-              <AlertCircle className="h-4 w-4 text-red-400" />
+              <AlertCircle className="h-4 w-4 text-red-400 flex-shrink-0" />
               <p className="text-sm text-red-400">{error}</p>
             </div>
           )}
 
-          <div className="flex justify-end gap-3">
+          {/* Action Buttons */}
+          <div className="flex justify-end gap-3 pt-2">
             <Button
               type="button"
               variant="ghost"
               onClick={handleClose}
-              disabled={isLoading}
+              disabled={isAdding}
               className="border border-gray-700 hover:bg-gray-800"
             >
               Cancel
             </Button>
             <Button
-              type="submit"
-              disabled={isLoading}
-              className="bg-cyan-600 hover:bg-cyan-700"
+              type="button"
+              onClick={handleAdd}
+              disabled={!tokenInfo || isAdding}
+              className="bg-green-600 hover:bg-green-700"
             >
-              {isLoading ? 'Adding...' : 'Add Token'}
+              {isAdding ? (
+                <>
+                  <Loader2 className="h-4 w-4 mr-2 animate-spin" />
+                  Adding...
+                </>
+              ) : (
+                'Add Token'
+              )}
             </Button>
           </div>
-        </form>
+        </div>
       </DialogContent>
     </Dialog>
   );

web/src/pages/WalletDashboard.tsx

@@ -245,12 +245,86 @@ const WalletDashboard: React.FC = () => {
         </div>
 
         <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
-          {/* Left Column - Balance */}
-          <div className="lg:col-span-1">
-            <AccountBalance />
+          {/* Left Column - Recent Activity & NFTs */}
+          <div className="lg:col-span-1 space-y-6">
+            {/* Recent Activity */}
+            <div className="bg-gray-900 border border-gray-800 rounded-lg p-6">
+              <div className="flex items-center justify-between mb-4">
+                <h3 className="text-lg font-semibold text-white">Recent Activity</h3>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  onClick={fetchRecentTransactions}
+                  disabled={isLoadingRecent}
+                  className="text-gray-400 hover:text-white"
+                >
+                  <RefreshCw className={`w-4 h-4 ${isLoadingRecent ? 'animate-spin' : ''}`} />
+                </Button>
+              </div>
+
+              {isLoadingRecent ? (
+                <div className="text-center py-8">
+                  <RefreshCw className="w-10 h-10 text-gray-600 mx-auto mb-3 animate-spin" />
+                  <p className="text-gray-400 text-sm">Loading...</p>
+                </div>
+              ) : recentTransactions.length === 0 ? (
+                <div className="text-center py-8">
+                  <History className="w-10 h-10 text-gray-600 mx-auto mb-3" />
+                  <p className="text-gray-500 text-sm">No recent transactions</p>
+                </div>
+              ) : (
+                <div className="space-y-2">
+                  {recentTransactions.slice(0, 5).map((tx) => (
+                    <div
+                      key={`${tx.blockNumber}-${tx.extrinsicIndex}`}
+                      className="bg-gray-800/50 border border-gray-700 rounded-lg p-3 hover:bg-gray-800 transition-colors"
+                    >
+                      <div className="flex items-center justify-between">
+                        <div className="flex items-center gap-2">
+                          {isIncoming(tx) ? (
+                            <div className="bg-green-500/20 p-1.5 rounded-lg">
+                              <ArrowDownRight className="w-3 h-3 text-green-400" />
+                            </div>
+                          ) : (
+                            <div className="bg-yellow-500/20 p-1.5 rounded-lg">
+                              <ArrowUpRight className="w-3 h-3 text-yellow-400" />
+                            </div>
+                          )}
+                          <div>
+                            <div className="text-white font-semibold text-xs">
+                              {isIncoming(tx) ? 'Received' : 'Sent'}
+                            </div>
+                            <div className="text-xs text-gray-500">
+                              #{tx.blockNumber}
+                            </div>
+                          </div>
+                        </div>
+                        <div className="text-right">
+                          <div className="text-white font-mono text-xs">
+                            {isIncoming(tx) ? '+' : '-'}{formatAmount(tx.amount || '0')}
+                          </div>
+                        </div>
+                      </div>
+                    </div>
+                  ))}
+                </div>
+              )}
+
+              <Button
+                onClick={() => setIsHistoryModalOpen(true)}
+                variant="outline"
+                size="sm"
+                className="mt-3 w-full border-gray-700 hover:bg-gray-800 text-xs"
+              >
+                View All
+              </Button>
+            </div>
+
+            {/* NFT Collection */}
+            <NftList />
           </div>
 
-          {/* Right Column - Actions */}
+          {/* Right Column - Actions & Tokens */}
           <div className="lg:col-span-2 space-y-6">
             {/* Quick Actions */}
             <div className="grid grid-cols-3 gap-4">
@@ -281,86 +355,8 @@ const WalletDashboard: React.FC = () => {
               </Button>
             </div>
 
-            {/* Recent Activity */}
-            <div className="bg-gray-900 border border-gray-800 rounded-lg p-6">
-              <div className="flex items-center justify-between mb-4">
-                <h3 className="text-lg font-semibold text-white">Recent Activity</h3>
-                <Button
-                  variant="ghost"
-                  size="icon"
-                  onClick={fetchRecentTransactions}
-                  disabled={isLoadingRecent}
-                  className="text-gray-400 hover:text-white"
-                >
-                  <RefreshCw className={`w-4 h-4 ${isLoadingRecent ? 'animate-spin' : ''}`} />
-                </Button>
-              </div>
-
-              {isLoadingRecent ? (
-                <div className="text-center py-12">
-                  <RefreshCw className="w-12 h-12 text-gray-600 mx-auto mb-3 animate-spin" />
-                  <p className="text-gray-400">Loading transactions...</p>
-                </div>
-              ) : recentTransactions.length === 0 ? (
-                <div className="text-center py-12">
-                  <History className="w-12 h-12 text-gray-600 mx-auto mb-3" />
-                  <p className="text-gray-500">No recent transactions found</p>
-                  <p className="text-gray-600 text-sm mt-1">
-                    Recent activity from last 10 blocks
-                  </p>
-                </div>
-              ) : (
-                <div className="space-y-3">
-                  {recentTransactions.map((tx) => (
-                    <div
-                      key={`${tx.blockNumber}-${tx.extrinsicIndex}`}
-                      className="bg-gray-800/50 border border-gray-700 rounded-lg p-3 hover:bg-gray-800 transition-colors"
-                    >
-                      <div className="flex items-center justify-between">
-                        <div className="flex items-center gap-3">
-                          {isIncoming(tx) ? (
-                            <div className="bg-green-500/20 p-2 rounded-lg">
-                              <ArrowDownRight className="w-4 h-4 text-green-400" />
-                            </div>
-                          ) : (
-                            <div className="bg-yellow-500/20 p-2 rounded-lg">
-                              <ArrowUpRight className="w-4 h-4 text-yellow-400" />
-                            </div>
-                          )}
-                          <div>
-                            <div className="text-white font-semibold text-sm">
-                              {isIncoming(tx) ? 'Received' : 'Sent'}
-                            </div>
-                            <div className="text-xs text-gray-400">
-                              Block #{tx.blockNumber}
-                            </div>
-                          </div>
-                        </div>
-                        <div className="text-right">
-                          <div className="text-white font-mono text-sm">
-                            {isIncoming(tx) ? '+' : '-'}{formatAmount(tx.amount || '0')}
-                          </div>
-                          <div className="text-xs text-gray-400">
-                            {tx.section}.{tx.method}
-                          </div>
-                        </div>
-                      </div>
-                    </div>
-                  ))}
-                </div>
-              )}
-
-              <Button
-                onClick={() => setIsHistoryModalOpen(true)}
-                variant="outline"
-                className="mt-4 w-full border-gray-700 hover:bg-gray-800"
-              >
-                View All Transactions
-              </Button>
-            </div>
-
-            {/* NFT Collection */}
-            <NftList />
+            {/* Token Balances */}
+            <AccountBalance />
           </div>
         </div>
       </div>