travisjneuman/NeumanOS ? reverse-engineered prompt

Build me a privacy first personal workspace app that runs entirely in the browser and keeps all data on the device, with no account required. I want one place for notes, tasks, kanban boards, a calendar, time tracking, habits, bookmarks, and a dashboard with useful widgets, plus an AI terminal that can connect to my own provider keys if I choose.

Make it feel like a modern offline app I can install as a PWA, with fast navigation, search, drag and drop, and a clean dark friendly interface. Notes should support rich text and markdown, tasks should have recurring items and dependencies, the calendar should handle day, week, month, and agenda views, and there should be simple spreadsheet and document tools too. Keep everything stored locally, and let me export my data anytime. If you need to check current docs for libraries or browser APIs, look them up online.