refactor: unify environment variable lookup logic

feat: add audit timestamps to core entities

refactor(env): implement unified runtime variable resolution

feat: add diagnostics dashboard and server build

feat: add prompt translator and clipboard utilities

feat: implement runtime environment variable injection

feat: implement global error boundary and env system

feat: configure deployment for Hugging Face Spaces

feat: add AI Sentry dashboard and Firebase support

feat: add email manager and expense tracker modules

feat: initialize personal developer dashboard