fix(clerk-js): Keyless UI shadows and copy improvement #11717

Job	Run time
check-permissions	1s
Formatting, linting & changeset checks	1m 59s
Integration Tests (generic, chrome)	4m 2s
Unit Tests (18)	52s
Integration Tests (express, chrome)	2m 11s
Unit Tests (22)	1m 29s
Integration Tests (quickstart, chrome)	2m 24s
Integration Tests (ap-flows, chrome)	2m 50s
Integration Tests (elements, chrome)	2m 51s
Integration Tests (sessions, chrome)	3m 44s
Integration Tests (astro, chrome)	3m 6s
Integration Tests (expo-web, chrome)	2m 29s
Integration Tests (tanstack-start, chrome)	3m 48s
Integration Tests (tanstack-router, chrome)	2m 35s
Integration Tests (vue, chrome)	2m 12s
Integration Tests (nuxt, chrome)	2m 28s
Integration Tests (react-router, chrome)	2m 30s
Integration Tests (nextjs, chrome, 13)	5m 29s
Integration Tests (nextjs, chrome, 14)	5m 27s
Integration Tests (nextjs, chrome, 15)	5m 26s
	57m 53s

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