chore: upgrade MUI, MUI X to v9

[seidior]

Description

Step 3 of our never-ending React 19 upgrade: bringing MUI and MUI X up to date.

This upgrades MUI core and MUI X from v5 to v9 using a combination of automatic upgraders and adaptation to the new MUI syntax.

Removes @mui/lab and @mui/styles (both dropped in MUI 9), migrates all inputProps/InputProps usages to the slotProps API, and updates the MUI X Date Picker API. Introduces a custom TabPanel component to replace the removed @mui/lab tab primitives.

Ticket

This pull request partially resolves #16176.

Approach

Upgrades MUI core from 5.18.0 → 9.0.1 and MUI X Date Pickers from 5.0.20 → 9.4.0. Three categories of forced changes:

@mui/lab removal — TabContext/TabList/TabPanel from @mui/lab no longer exist in MUI 9. Replaced with a custom TabPanel component (web/src/components/TabPanel.tsx) and MUI Tabs/Tab. Affected: LicenseTask, TwoTabDashboardLayout, ElevatorRegistrationTask, HotelMotelRegistrationTask, MultipleDwellingRegistrationTask, CrtkStatus, Xray, XrayTabZero.

@mui/styles removal — makeStyles/createStyles dropped in MUI 9. Replaced with sx prop and inline style objects. Affected: ArrowTooltip, XrayStatus, CrtkStatus, CheckLicenseStatus, AnytimeActionSearch.

inputProps/InputProps → slotProps migration — deprecated API removed in MUI 9. All TextField usages updated to slotProps={{ htmlInput: {...}, input: {...} }}. Affected: GenericTextField and ~30 component/data-field files.

MUI X Date Picker API migration — inputFormat/InputProps replaced with format/slotProps. handleTextInputChange wired to slotProps.textField.slotProps.htmlInput.onChange to preserve the name attribute on the backing input. Affected: DateOfFormation, FormationDate, EmergencyTripPermitDatePicker, CigaretteSalesStartDate.

muiTheme.ts — removed @mui/styles theme provider setup.

Test harness fixes:

• web/setupTests.js: added addEventListener/removeEventListener to the matchMedia mock (MUI X 9 calls these during picker initialization).
• web/cypress/support/commands.js — chooseDatePicker: MUI X 9's accessible date picker renders aria-hidden backing inputs; fixed using nativeInputValueSetter pattern to trigger React's synthetic onChange.
• web/cypress/e2e/deadlinks.spec.ts: hardcoded password replaced with Cypress.env("ADMIN_PASSWORD"); web/cypress.config.js updated to forward process.env.ADMIN_PASSWORD into the Cypress env.
• web/cypress/support/helpers/helpers.ts — completeTaxClearanceFlow: added guard to detect and dismiss stale "Unlink Tax ID" state from prior test runs.
• Unit test fixes for SalesInfo.test.tsx, shared-submenu-components.test.tsx, onboarding-foreign.test.tsx to match new MUI 9 DOM/interaction patterns.

Steps to Test

1. yarn workspace @businessnjgovnavigator/web test — all Jest unit tests should pass.
2. Start services and dev server (yarn start:dev), then run ./scripts/local-feature-tests.sh.
3. Manual smoke: onboarding flow, date pickers (DateOfFormation, EmergencyTripPermitDatePicker), tabbed task pages (LicenseTask, ElevatorRegistrationTask, Xray), dropdown fields, navbar menus.

Code author checklist

• I have rebased this branch from the latest main branch
• I have performed a self-review of my code
• My code follows the style guide
• I have created and/or updated relevant documentation on the engineering documentation website
• I have not used any relative imports
• I have pruned any instances of unused code
• I have not added any markdown to labels, titles and button text in config
• If I added/updated any values in userData (including profileData, formationData etc), then I added a new migration file
• I have checked for and removed instances of unused config from CMS
• If I added any new collections to the CMS config, then I updated the search tool and cmsCollections.ts (see CMS Additions in Engineering Reference/FAQ on the engineering documentation site)
• I have updated relevant .env values in .env-template, in Bitwarden, and in our workspaces
• I have added the pr-show or pr-review label on GitHub to show or request reviews

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