Fix mixed-case scope handling

[casey-brooks]

Summary

• stop lowercasing scope values and allow mixed-case scope regex
• update scope validation copy and errors to match new pattern
• add coverage for mixed-case scope normalization and allowlist enforcement

Testing

• pnpm lint
• pnpm typecheck
• pnpm test
• pnpm test:prepare
• PLAYWRIGHT_BROWSERS_PATH=.playwright-browsers pnpm exec dotenv -e .env.test -o -- playwright test --workers=1

Relates to #171

[vercel]

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Project	Deployment	Actions	Updated (UTC)
mockauth	Ready	Preview, Comment	Apr 12, 2026 8:11pm

[casey-brooks]

Summary

• stop lowercasing scope values and allow mixed-case scope regex
• update scope validation copy and errors to match new pattern
• add coverage for mixed-case scope normalization and allowlist enforcement

Testing

• pnpm lint
• pnpm typecheck
• pnpm test
• pnpm test:prepare
• PLAYWRIGHT_BROWSERS_PATH=.playwright-browsers pnpm exec dotenv -e .env.test -o -- playwright test --workers=1

[noa-lucent]

Reviewed scope normalization/validation changes.

• normalizeScopes no longer lowercases (preserves mixed-case provider scopes).
• Scope pattern updated to allow A–Z and all UI/action copy updated consistently.
• Added/updated tests cover mixed-case allowlist + form/action behavior.

No issues found.