feat(26-8923): Add React form application — generated by Optimus

[tarratsco]

⚠️ AI-Generated PR — This pull request was automatically generated by Optimus. All code requires human review and testing before merging.

Are you removing, renaming or moving a folder in this PR?

• No, I'm not changing any folders

⚠️ TeamSites ⚠️

• No

Summary

Adds a new vets-website React form application for VA Form 26-8923 — IRRRL Worksheet (Interest Rate Reduction Refinancing Loan), located at src/applications/benefits/26-8923/.

This application provides a structured, multi-chapter form experience for lenders and Veterans completing the IRRRL Worksheet, supporting the VA home loan refinancing process. Key details:

• Root URL: /housing-assistance/home-loans/irrrl-worksheet
• Entry point: app-entry.jsx wired via manifest.json with entryName: irrrl-worksheet-26-8923
• Chapters (5 total):
  • loanIdentification — Loan identification fields to associate the worksheet with a specific VA loan
  • sectionI — Rendered via SectionIPage.jsx; captures existing loan data (original loan terms, balance, interest rate)
  • sectionII — Rendered via SectionIIPage.jsx; captures proposed refinance loan terms
  • sectionIII — Rendered via SectionIIIPage.jsx; captures fee recoupment and net tangible benefit calculations
  • lenderCertification — Lender certification and signature fields
• Computed line display: ComputedLineDisplay.jsx renders auto-calculated worksheet line items (e.g., monthly payment comparisons, recoupment period) using logic from utils/irrrlCalculations.js, which houses IRRRL-specific financial calculation helpers
• VADS components used: Form process steps, schema-driven form fields, confirmation page pattern, breadcrumbs enabled via manifest template
• Styling: sass/26-8923.scss imports VADS CSS library form-process module, platform schemaform and confirmation styles, and adds custom .irrrl-computed-line flexbox layout for computed worksheet line display
• Save-in-progress / prefill: Configured via platform form config in config/form.js using the standard react-jsonschema-form / platform/forms-system foundation
• No feature flipper is used; vagovprod: false in the manifest until the form is production-ready
• Team: Optimus / Aquia

Files

• src/applications/benefits/26-8923/manifest.json
• src/applications/benefits/26-8923/sass/26-8923.scss
• src/applications/benefits/26-8923/app-entry.jsx
• src/applications/benefits/26-8923/reducers/index.js
• src/applications/benefits/26-8923/routes.js
• src/applications/benefits/26-8923/containers/App.jsx
• src/applications/benefits/26-8923/containers/IntroductionPage.jsx
• src/applications/benefits/26-8923/containers/ConfirmationPage.jsx
• src/applications/benefits/26-8923/utils/irrrlCalculations.js
• src/applications/benefits/26-8923/components/ComputedLineDisplay.jsx
• src/applications/benefits/26-8923/components/SectionIPage.jsx
• src/applications/benefits/26-8923/components/SectionIIPage.jsx
• src/applications/benefits/26-8923/components/SectionIIIPage.jsx
• src/applications/benefits/26-8923/config/chapters/loanIdentification.js
• src/applications/benefits/26-8923/config/chapters/sectionI.js
• src/applications/benefits/26-8923/config/chapters/sectionII.js
• src/applications/benefits/26-8923/config/chapters/sectionIII.js
• src/applications/benefits/26-8923/config/chapters/lenderCertification.js
• src/applications/benefits/26-8923/config/form.js

Related issue(s)

• department-of-veterans-affairs/va.gov-team#0000

Testing done

• Code generated by Optimus AI — engineer must verify locally before merging.

Acceptance criteria

• Unit tests added for form config and page components
• Unit tests added for irrrlCalculations.js financial calculation utilities
• ComputedLineDisplay.jsx renders correct computed values for representative inputs
• No PII/credentials/internal URLs hardcoded
• Linting warnings addressed
• Accessibility testing performed
• Browser console contains no warnings or errors