Improve explorer SSR, hydration, compaction, and smoke coverage.

Defer heavy getServerSideProps on home, operator, addresses, and wallet to cut TTFB; centralize locale-safe formatters with client-only relative times; add compact ops UX, bridge/operator relay pagination, and Playwright route/scroll smoke in deploy.

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

frontend/src/utils/walletWatchToken.ts

@@ -0,0 +1,64 @@
+import type { WalletChain } from '@/components/wallet/AddToMetaMask'
+import { toWalletAddEthereumChainParams } from '@/utils/walletAddEthereumChain'
+import {
+  buildWatchAssetRpcRequest,
+  type WatchAssetToken,
+} from '@/utils/walletWatchAsset'
+import {
+  isMobileWalletContext,
+  type EthereumProvider,
+} from '@/utils/walletProviderEnv'
+
+export async function switchOrAddChain(
+  ethereum: EthereumProvider,
+  chain: WalletChain,
+): Promise<boolean> {
+  try {
+    await ethereum.request({
+      method: 'wallet_switchEthereumChain',
+      params: [{ chainId: chain.chainId }],
+    })
+    return true
+  } catch (e) {
+    const err = e as { code?: number }
+    if (err.code !== 4902) return false
+  }
+
+  try {
+    await ethereum.request({
+      method: 'wallet_addEthereumChain',
+      params: [
+        toWalletAddEthereumChainParams(chain, {
+          preferSingleRpc: isMobileWalletContext(),
+        }),
+      ],
+    })
+    return true
+  } catch {
+    return false
+  }
+}
+
+export async function watchTokenInWallet(
+  ethereum: EthereumProvider,
+  token: WatchAssetToken,
+  chain: WalletChain,
+): Promise<{ ok: boolean; added?: boolean; error?: string }> {
+  const switched = await switchOrAddChain(ethereum, chain)
+  if (!switched) {
+    return { ok: false, error: `Failed to switch to ${chain.chainName}. Add the network first, then retry.` }
+  }
+
+  try {
+    const added = await ethereum.request(
+      buildWatchAssetRpcRequest(token, isMobileWalletContext()),
+    )
+    return { ok: true, added: Boolean(added) }
+  } catch (e) {
+    const err = e as { code?: number; message?: string }
+    if (err.code === 4001 || /rejected|denied|not been authorized/i.test(err.message || '')) {
+      return { ok: false, error: 'Wallet request was rejected. Approve the popup to add the token.' }
+    }
+    return { ok: false, error: err.message || 'Could not add token to wallet.' }
+  }
+}