feat(explorer): dual-chain wallet metadata, native coin pricing, and UI refresh.

Add Chain 138 wallet network metadata and stats coin-price enrichment; sync frontend explorer SPA, command center, and address/token pages with backend config.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/.vscode/settings.json

@@ -0,0 +1,23 @@
+{
+  "go.useLanguageServer": true,
+  "go.alternateTools": {
+    "go": "/home/intlc/sdk/go1.23.4/bin/go",
+    "gopls": "/home/intlc/go/bin/gopls"
+  },
+  "go.toolsEnvVars": {
+    "GO111MODULE": "on",
+    "GOWORK": "off",
+    "GOROOT": "/home/intlc/sdk/go1.23.4",
+    "GOPATH": "/home/intlc/go",
+    "GOMODCACHE": "/home/intlc/go/pkg/mod"
+  },
+  "gopls": {
+    "build.env": {
+      "GO111MODULE": "on",
+      "GOWORK": "off",
+      "GOROOT": "/home/intlc/sdk/go1.23.4",
+      "GOPATH": "/home/intlc/go",
+      "GOMODCACHE": "/home/intlc/go/pkg/mod"
+    }
+  }
+}