Add spacing between wallet viewer icon buttons (#156)

* style: increase spacing between wallet header icon buttons

Changed gap-2 to gap-3 for better visual separation between the info,
refresh, and disconnect icon buttons in the wallet viewer header.

* style: remove "Waiting for payment..." text from receive dialog

The QR code overlay spinner already indicates payment checking status.

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Co-authored-by: Claude <noreply@anthropic.com>

src/components/WalletViewer.tsx

@@ -993,7 +993,7 @@ export default function WalletViewer() {
         </div>
 
         {/* Right: Info Dropdown, Refresh, Disconnect */}
-        <div className="flex items-center gap-2">
+        <div className="flex items-center gap-3">
           {walletInfo && (
             <DropdownMenu>
               <DropdownMenuTrigger asChild>
@@ -1633,7 +1633,6 @@ export default function WalletViewer() {
             <DialogTitle>Receive Payment</DialogTitle>
             <DialogDescription>
               Generate a Lightning invoice to receive sats.
-              {checkingPayment && " Waiting for payment..."}
             </DialogDescription>
           </DialogHeader>