refactor: migrate private-key list and connect page

[gantunesr]

Description

Changelog

CHANGELOG entry:

Related issues

Fixes:

Manual testing steps

1. Go to this page...

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[mm-token-exchange-service]

✨ Files requiring CODEOWNER review ✨

🔑 @MetaMask/accounts-engineers (4 files, +159 -103)

• 📁 ui/
  • 📁 components/
    • 📁 multichain-accounts/
      • 📁 multichain-private-key-list/
        • 📄 multichain-private-key-list.tsx +9 -10
  • 📁 pages/
    • 📁 multichain-accounts/
      • 📁 multichain-accounts-connect-page/
        • 📁 __snapshots__/
          • 📄 multichain-accounts-connect-page.test.tsx.snap +111 -45
          • 📄 multichain-accounts-connect-page.test.tsx +5 -7
          • 📄 multichain-accounts-connect-page.tsx +34 -41

[metamaskbotv2]

Builds ready [3a54e26]

• ⚠️ Make sure the build is safe before downloading and running this build.
  • Please do not use these builds with accounts that contain significant real money.
  • Beware the security risks of cache poisoning.
• Webpack builds: chrome, firefox
• Webpack builds (beta): chrome, firefox
• Webpack builds (flask): chrome, firefox
• Webpack builds (test): chrome, firefox
• Webpack builds (test-flask): chrome, firefox
• bundle size: Bundle Size Stats
• bundle analyzer: Bundle Analyzer
• interaction-benchmark: Interaction Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts

Deprecated Browserify fallback builds

• Browserify builds: chrome, firefox
• Browserify builds (beta): chrome, firefox
• Browserify builds (flask): chrome, firefox
• Browserify builds (test): chrome, firefox
• Browserify builds (test-flask): chrome, firefox

⚡ Performance Benchmarks (Total: 🟢 17 pass · 🟡 6 warn · 🔴 2 fail)

Baseline (latest main): ae7f0e0 | Date: 6/11/2026 | Pipeline: 27389679290 | Baseline logs

Metrics	chrome-webpack	firefox-webpack
loadNewAccount [Sentry log · main/release]	🟡 inp(p95) [CI log]	🔴 load_new_account(p95) [CI log]
onboardingNewWallet [Sentry log · main/release]	🟢 [CI log]	🔴 [CI log]

Regressions (🔴 2 failures)

• loadNewAccount [Sentry log · main/release] · firefox-webpack — load_new_account(p75) [CI log]
• onboardingNewWallet [Sentry log · main/release] · firefox-webpack — total(p75) [CI log]

Interaction Benchmarks · Samples: 5 🔴 1

Benchmark	chrome-webpack	firefox-webpack
loadNewAccount [Sentry log · main/release]	🟡 [CI log]	🔴 [CI log] 🔴 load_new_account
confirmTx [Sentry log · main/release]	🟢 [CI log]	🟢 [CI log]
bridgeUserActions [Sentry log · main/release]	🟢 [CI log]	🟢 [CI log]

📈 Results compared to the previous 5 runs on main

• ↓ loadNewAccount/load_new_account: -19%
• ↓ loadNewAccount/total: -19%
• ↑ loadNewAccount/inp: +23%
• ↑ loadNewAccount/fcp: +14%
• ↓ loadNewAccount/lcp: -65%
• ↑ bridgeUserActions/bridge_load_page: +33%
• ↓ bridgeUserActions/bridge_load_asset_picker: -23%
• ↑ bridgeUserActions/longTaskCount: +100%
• ↑ bridgeUserActions/longTaskTotalDuration: +68%
• ↑ bridgeUserActions/longTaskMaxDuration: +15%
• ↑ bridgeUserActions/tbt: +52%
• ↑ loadNewAccount/load_new_account: +400%
• ↑ loadNewAccount/total: +400%
• ↓ loadNewAccount/inp: -35%
• ↓ loadNewAccount/fcp: -51%
• ↑ loadNewAccount/lcp: +373%
• ↓ confirmTx/longTaskCount: -100%
• ↓ confirmTx/longTaskTotalDuration: -100%
• ↓ confirmTx/longTaskMaxDuration: -100%
• ↓ confirmTx/tbt: -100%
• ↓ confirmTx/fcp: -50%
• ↑ confirmTx/lcp: +1167%
• ↑ bridgeUserActions/bridge_load_page: +77%
• ↑ bridgeUserActions/bridge_load_asset_picker: +22%
• ↓ bridgeUserActions/longTaskCount: -100%
• ↓ bridgeUserActions/longTaskTotalDuration: -100%
• ↓ bridgeUserActions/longTaskMaxDuration: -100%
• ↓ bridgeUserActions/tbt: -100%
• ↓ bridgeUserActions/inp: -18%
• ↓ bridgeUserActions/fcp: -46%
• ↑ bridgeUserActions/lcp: +1068%

🌐 Core Web Vitals — 🟢 good · 🟡 needs improvement · 🔴 poor (web.dev thresholds)

• 🟡 loadNewAccount/FCP: p75 1.9s

Startup Benchmarks · Samples: 100

Benchmark	chrome-webpack	firefox-webpack
startupStandardHome [Sentry log · main/release]	🟢 [CI log]	🟢 [CI log]
startupPowerUserHome [Sentry log · main/release]	🟡 [CI log]	🟡 [CI log]

📈 Results compared to the previous 5 runs on main

• ↓ startupStandardHome/inp: -11%
• ↑ startupPowerUserHome/longTaskMaxDuration: +12%
• ↑ startupPowerUserHome/inp: +11%
• ↑ startupPowerUserHome/backgroundConnect: +41%
• ↑ startupPowerUserHome/setupStore: +19%
• ↑ startupPowerUserHome/fcp: +17%

🌐 Core Web Vitals — 🟢 good · 🟡 needs improvement · 🔴 poor (web.dev thresholds)

• 🔴 startupPowerUserHome/INP: p75 592ms
• 🟡 startupPowerUserHome/INP: p75 208ms
• 🟡 startupPowerUserHome/LCP: p75 3.2s

User Journey Benchmarks · Samples: 5 · mock API 🔴 1

Benchmark	chrome-webpack	firefox-webpack
onboardingImportWallet [Sentry log · main/release]	🟢 [CI log]	🟢 [CI log]
onboardingNewWallet [Sentry log · main/release]	🟢 [CI log]	🔴 [CI log] 🔴 total
assetDetails [Sentry log · main/release]	🟢 [CI log]	🟡 [CI log]
solanaAssetDetails [Sentry log · main/release]	🟢 [CI log]	🟡 [CI log]
importSrpHome [Sentry log · main/release]	🟢 [CI log]	🟢 [CI log]
sendTransactions [Sentry log · main/release]	🟢 [CI log]	🟡 [CI log]
swap [Sentry log · main/release]	🟢 [CI log]	🟢 [CI log]

📈 Results compared to the previous 5 runs on main

• ↓ onboardingImportWallet/doneButtonToHomeScreen: -89%
• ↓ onboardingImportWallet/openAccountMenuToAccountListLoaded: -97%
• ↓ onboardingImportWallet/longTaskCount: -72%
• ↓ onboardingImportWallet/longTaskTotalDuration: -88%
• ↓ onboardingImportWallet/longTaskMaxDuration: -81%
• ↓ onboardingImportWallet/tbt: -95%
• ↓ onboardingImportWallet/total: -88%
• ↑ onboardingNewWallet/skipBackupToMetricsScreen: +12%
• ↓ onboardingNewWallet/doneButtonToAssetList: -47%
• ↓ onboardingNewWallet/longTaskCount: -44%
• ↓ onboardingNewWallet/longTaskTotalDuration: -58%
• ↓ onboardingNewWallet/longTaskMaxDuration: -28%
• ↓ onboardingNewWallet/tbt: -68%
• ↓ onboardingNewWallet/total: -41%
• ↑ solanaAssetDetails/assetClickToPriceChart: +97%
• ↑ solanaAssetDetails/total: +97%
• ↓ solanaAssetDetails/inp: -40%
• ↓ solanaAssetDetails/lcp: -13%
• ↓ solanaAssetDetails/cls: -92%
• ↓ importSrpHome/loginToHomeScreen: -23%
• ↑ importSrpHome/openAccountMenuAfterLogin: +35%
• ↓ importSrpHome/homeAfterImportWithNewWallet: -40%
• ↓ importSrpHome/longTaskCount: -40%
• ↓ importSrpHome/longTaskTotalDuration: -39%
• ↓ importSrpHome/longTaskMaxDuration: -19%
• ↓ importSrpHome/tbt: -45%
• ↓ importSrpHome/total: -36%
• ↓ importSrpHome/inp: -29%
• ↑ sendTransactions/openSendPageFromHome: +15%
• ↑ sendTransactions/selectTokenToSendFormLoaded: +15%
• ↓ sendTransactions/inp: -19%
• ↓ sendTransactions/cls: -90%

🌐 Core Web Vitals — 🟢 good · 🟡 needs improvement · 🔴 poor (web.dev thresholds)

• 🟡 assetDetails/FCP: p75 2.0s
• 🟡 solanaAssetDetails/FCP: p75 1.8s
• 🟡 sendTransactions/FCP: p75 1.8s

Dapp Page Load Benchmarks · Samples: 100

Benchmark	chrome-webpack
dappPageLoad [Sentry log · main/release]	🟢 [CI log]

Bundle size diffs

• background: 58 Bytes (0%)
• ui: -326 Bytes (0%)
• common: 20 Bytes (0%)