Massive Code Reduction via Unification and DBOS

Identify an opportunity 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 - Front end component or group of them duplicates another component functionality. Use the most modern and nice looking - Move to DBOS and get rid of supporting functionality relying on DBOS - etc. Implement it

Unified web status dots (StatusDot), "Saved." state (useSubmit), byte/time/duration formatters: −54 prod lines. No safe massive cut left; fleet-gated cuts + UI notes deferred in report. Full gate green, PR #5319 merged, Jaah Deploy success.