test: give each Tailwind render its own cache key, never the clock

[YevheniiKotyrlo]

Problem

src/__tests__/vendor/tailwind/_tailwind.tsx passes tailwind({ base: Date.now().toString() }) so that renders do not share Tailwind's compiler cache. Two renders that start in the same millisecond get the same base, and the second compiles against the first's stylesheet, so its class renders no style. In a full yarn test run a random Tailwind case fails this way and passes alone: I hit Layout - Top Right Bottom Left › left-1, Sizing - Height › h-px and Layout - Clear › clear-left, each rendering { props: {} }.

Solution

A counter gives every render a base of its own.

Tests

src/__tests__/vendor/tailwind/harness.test.tsx freezes Date.now() and renders left-0, then left-1. On main the second renders { props: {} }; here each renders its own value.

Verification

On Ubuntu with the workflow's steps - build, lint, typecheck, yarn test, node --test node/__tests__/*.mjs, both library builds, the web export, the unstaged-changes checks and commitlint - everything passes.