refactor: migrate trivial components to TypeScript

[kyle-ssg]

…pt FC

Remove all propTypes usage across the frontend codebase including global window assignments, ESLint globals, and per-component propTypes definitions. Remove direct prop-types dependency from package.json.

Convert 9 trivial class components to typed functional components: Flex, Column, NotFoundErrorPage, ErrorMessage, PasswordRequirements, SimpleTwoFactor/prompt, SimpleTwoFactor/index, TwoFactor, OrganisationSelect.

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Changes

Migrates some simple components to TypeScript

Password Requirements

ErrorMessage

Not Found Page

Radio

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Project	Deployment	Actions	Updated (UTC)
flagsmith-frontend-preview	Ready	Preview, Comment	Apr 14, 2026 1:06pm
flagsmith-frontend-staging	Ready	Preview, Comment	Apr 14, 2026 1:06pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Ignored		Apr 14, 2026 1:06pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-7231	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-7231	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-7231	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-7231	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-7231	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-7231	Finished ✅	Results ✅

[github-actions]

Playwright Test Results (oss - depot-ubuntu-latest-16)

 11 passed

Details

 11 tests across 8 suites
 20.4 seconds
 db1daf3
 🔄 Run: #16030 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-arm-16)

 11 passed

Details

 11 tests across 8 suites
 28.7 seconds
 db1daf3
 🔄 Run: #16030 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-16)

 17 passed

Details

 17 tests across 14 suites
 58.9 seconds
 db1daf3
 🔄 Run: #16030 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-arm-16)

 2 passed

Details

 2 tests across 2 suites
 1 minute, 5 seconds
 db1daf3
 🔄 Run: #16030 (attempt 1)

[github-actions]

Visual Regression

16 screenshots compared. See report for details.
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