feat(explorer): token-list surfaces, homepage trim, and sprint smoke tests

Unify wallet/catalog/extended token-list policy, add contract verification CTA,
trim the homepage dashboard with status strip and recent activity, and add Playwright smoke coverage.

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

scripts/e2e-sprint-smoke.spec.ts

@@ -0,0 +1,28 @@
+import { expect, test } from '@playwright/test'
+
+const EXPLORER_URL = process.env.EXPLORER_URL || 'https://explorer.d-bis.org'
+const CANONICAL_CUSDT = '0x93E66202A11B1772E55407B32B44e5Cd8eda7f22'
+
+test.describe('Explorer sprint smoke', () => {
+  test('homepage dashboard loads', async ({ page }) => {
+    await page.goto(`${EXPLORER_URL}/`, { waitUntil: 'domcontentloaded', timeout: 20000 })
+    await expect(page.getByText(/Network overview/i)).toBeVisible({ timeout: 10000 })
+    await expect(page.getByRole('heading', { name: /Recent Transactions/i })).toBeVisible({ timeout: 10000 })
+  })
+
+  test('wallet page loads', async ({ page }) => {
+    await page.goto(`${EXPLORER_URL}/wallet`, { waitUntil: 'domcontentloaded', timeout: 20000 })
+    await expect(page.getByRole('heading', { name: /Wallet Tools/i })).toBeVisible({ timeout: 10000 })
+  })
+
+  test('tokens page loads', async ({ page }) => {
+    await page.goto(`${EXPLORER_URL}/tokens`, { waitUntil: 'domcontentloaded', timeout: 20000 })
+    await expect(page.getByRole('heading', { name: /^Tokens$/i })).toBeVisible({ timeout: 10000 })
+    await expect(page.getByText(/Canonical Chain 138 trading set/i).first()).toBeVisible({ timeout: 10000 })
+  })
+
+  test('canonical cUSDT token detail loads', async ({ page }) => {
+    await page.goto(`${EXPLORER_URL}/tokens/${CANONICAL_CUSDT}`, { waitUntil: 'domcontentloaded', timeout: 20000 })
+    await expect(page.getByText(/cUSDT|Tether/i).first()).toBeVisible({ timeout: 10000 })
+  })
+})