[Raju Ahmed (raju-opti)]

Summary

Follow-up to #1186. tests/browser now runs browser and UMD tests in CI, so this removes the setup it replaced, plus leftovers from the Karma era.

• Remove the old root browser/UMD setup.
  • Deleted: vitest.browser.config.mts, vitest.umd.config.mts, scripts/run-browser-tests.js, scripts/run-umd-tests.js, scripts/patch-vitest-viewport.js, vitest/umd-plugin.ts.
  • Root package.json: removed the test-browser* / test-umd* scripts and the @vitest/browser, browserstack-local and webdriverio devDependencies.
  • Root lockfile: 220 entries removed, none added. npm uninstall alone would have kept @vitest/browser/webdriverio and their dependencies as optional peers of the root Vitest, so those were pruned too. Re-resolving moved @babel/runtime from 7.28.4 to 7.29.13 (in range).
• Make tests/browser self-contained. It no longer imports from the root vitest/ folder, which is gone.
  • The request logger and public/console-capture.js moved into it.
  • The console-capture plugin was merged into the local one: it keeps the /__vitest_console__ endpoint and injects the script via transformIndexHtml.
  • The UMD bundle is copied to tests/browser/public/dist, which is gitignored via dist/.
• Remove Karma leftovers.
  • Deleted lib/index.browser.umdtests.js. Nothing ran it, and two of its imports no longer exist.
  • Removed the *.umdtests.js patterns from .eslintignore, both tsconfigs, .platform-isolation.config.js and scripts/platform-utils.js.
  • Removed the BROWSER_STACK_* env var fallbacks and the commented-out crossbrowser_and_umd_unit_tests CI job.
• Update docs and comments.
  • Comments and the tests/browser README describe the current setup instead of comparing it with the removed one.
  • vitest3-compat.setup.ts is renamed to restore-all-mocks.setup.ts.
  • The root README's testing section points to tests/browser.
  • CHANGELOG.md keeps its historical entries.

No SDK source changes.

Test plan

• Root:
  • npm run validate-platform-isolation: passes.
  • npm run lint: 0 errors.
  • npm run test-vitest: 1128 passed.
  • npm run test-mocha: 815 passing.
• tests/browser, local Chrome:
  • Full suite: 1026/1026.
  • npm run test-umd-local (full rolldown build, bundle copied to public/dist): 2/2.
  • Console capture and request logger (VITEST_CONSOLE_CAPTURE / VITEST_REQUEST_LOGGER): both work from their new location.
• A repo-wide search finds no references to the removed files, Vitest 3, Karma, umdtests or BROWSER_STACK outside CHANGELOG.md and lockfiles.
• BrowserStack: covered by this PR's CI run (browser_tests job).

Issues

• FSSDK-13413

🤖 Generated with Claude Code

[Coveralls (coveralls)]

coverage: 77.513%. remained the same — raju/remove-old-browser-tests into master