feat: add phantom integration

app/globals.css

@@ -593,6 +593,52 @@ button:hover:not(:disabled) {
   font-size: 12px;
 }
 
+.wallet-selector {
+  margin-top: 12px;
+  padding: 14px;
+  border: 1px solid var(--border);
+  border-radius: 14px;
+  background: var(--surface);
+}
+
+.wallet-selector-head {
+  display: flex;
+  align-items: baseline;
+  gap: 12px;
+  flex-wrap: wrap;
+  margin-bottom: 10px;
+}
+
+.wallet-toggle {
+  display: inline-flex;
+  gap: 10px;
+}
+
+.wallet-chip {
+  border: 1px solid var(--border);
+  background: var(--surface-soft);
+  color: var(--ink);
+  padding: 10px 14px;
+  border-radius: 12px;
+  font-weight: 700;
+  display: inline-flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.wallet-chip.active {
+  border-color: var(--accent);
+  background: rgba(14, 165, 233, 0.12);
+  color: var(--accent-strong);
+  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
+}
+
+.wallet-icon {
+  width: 18px;
+  height: 18px;
+  display: inline-block;
+}
+
 .footer {
   margin-top: 8px;
   padding: 14px 18px;