Lock the Apple Silicon upload flow behind a real browser regression and migrate the Pagefind browser regression onto a shared typed harness. This keeps the branch non-runtime and repairs the targeted pagefind script alias after moving the browser test to TypeScript.
Constraint: Must avoid runtime code changes on this branch
Rejected: Ship the app-test coverage without fixing script aliases | leaves a broken targeted check in package.json
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Keep browser-only support helpers under test/playwright/support until runtime code is typed separately
Tested: pnpm run typecheck; pnpm run test:browser; pnpm run test:browser:pagefind
Not-tested: pnpm run test:browser:pagefind:live
