Dev log: fixing silent multi-tenant registration gaps and four hidden frontend bugs

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A developer published a detailed log of a day spent fixing silent but critical bugs across a multi-tenant web application after deploying it to a live host. The core issue was that new user registrations created valid accounts with no assigned role or organisation, causing dashboards to appear broken rather than throwing any visible error. The fix wraps user creation, role assignment, and organisation provisioning in a single database transaction, ensuring no partial account states can persist. A shared action was also introduced to unify admin-created and self-registered account paths, with a backfill operation correcting existing affected accounts. The log also highlights a subtle session-hijack bug where a tenancy helper, if reused for another user, would silently switch the acting admin into the new user's tenant mid-request.

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