feat: explorer API, wallet, CCIP scripts, and config refresh

- Backend REST/gateway/track routes, analytics, Blockscout proxy paths.
- Frontend wallet and liquidity surfaces; MetaMask token list alignment.
- Deployment docs, verification scripts, address inventory updates.

Check: go build ./... under backend/ (pass).
Made-with: Cursor

frontend/libs/frontend-api-client/api-base.test.ts

@@ -0,0 +1,31 @@
+import { describe, expect, it } from 'vitest'
+import { resolveExplorerApiBase } from './api-base'
+
+describe('resolveExplorerApiBase', () => {
+  it('prefers an explicit env value when present', () => {
+    expect(
+      resolveExplorerApiBase({
+        envValue: 'https://explorer.d-bis.org/',
+        browserOrigin: 'http://127.0.0.1:3000',
+      })
+    ).toBe('https://explorer.d-bis.org')
+  })
+
+  it('falls back to same-origin in the browser when env is empty', () => {
+    expect(
+      resolveExplorerApiBase({
+        envValue: '',
+        browserOrigin: 'http://127.0.0.1:3000/',
+      })
+    ).toBe('http://127.0.0.1:3000')
+  })
+
+  it('falls back to the local backend on the server when no other base is available', () => {
+    expect(
+      resolveExplorerApiBase({
+        envValue: '',
+        browserOrigin: '',
+      })
+    ).toBe('http://localhost:8080')
+  })
+})