Add GET /api/onboarding/slug-available endpoint to check if a slug is
already taken. Frontend checks availability with 400ms debounce as the
user types and shows inline feedback. Submit button disabled when slug
is taken. POST /api/onboarding/tenant now returns 409 instead of 500
for duplicate slugs.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Defer provisionAsync() until after the transaction commits using
TransactionSynchronization.afterCommit(). Previously the @Async thread
raced the @Transactional commit — findById returned null because the
tenant INSERT wasn't visible yet.
Downgrade ClickHouse UNKNOWN_TABLE errors to DEBUG level in
InfrastructureService. These are expected on fresh installs before any
cameleer-server has created the tables.
Make the onboarding slug field read-only (derived from org name).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add 32px card padding and reduce max-width to 420px for consistency
with the sign-in page. Add noValidate to prevent browser-native
required validation outlines on inputs.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
