Implement Top 5 Repo Code Reductions

Identify top 5 opportunities to massively reduce the amount of code (lines of code) in any part of the repo: - Similar functionality that can be unified and reused - Code that has been valuable but no more - A front end component or a group of them duplicate another component/page functionality. Use the most modern and nice looking - etc. Now implement them :)

Implemented 5 single-home consolidations (useSubmit in 19 web files, shared test login, API clock/key/predicate homes, from_attributes on 7 Out models, daemon/tools helpers): 57 files, net −211. Full gate green, PR #5385 merged, Jaah Deploy success. No dead modules found; massive levers (tests 56%, vendor 143K, types.ts, Out serializers) named as deferred follow-ups; /profile UI nits deferred (task_create refused, R30). mem-15202/15203 proposed.