Summary

• fixes extractIdentifierFromUrl() so generated /id/qryptchat... profile links round-trip correctly
• preserves the lowercase qryptchat prefix during validation by normalizing through parseUniqueIdentifier()
• supports trailing slash, query string, and hash delimiters on profile URLs
• adds focused coverage in tests/unique-identifier-utils.test.js

Fixes #105.

Validation

• corepack pnpm exec mocha tests/unique-identifier-utils.test.js - 19 passing
• direct Node round-trip check for generateShareableProfileUrl() + extractIdentifierFromUrl()

Build note

• corepack pnpm build compiles successfully, then fails on existing environment/config issues: ESLint cannot resolve globals from eslint.config.js, and Next page-data collection requires supabaseUrl.