wellwellwellyourefeelingfine/m-session ? reverse-engineered prompt

Build me a privacy first web app that guides people through an intentional MDMA session from start to finish. It should work on the device only, with no accounts, no cloud, and no tracking. I want a smooth flow for preparation, setting an intention, checking safety, moving through the come up, peak, and integration parts, then closing and follow up later.

The app should include guided audio meditations, journaling prompts, a values exercise, breathwork, reminders for hydration and grounding, and a simple timeline the user can edit if they want to reorder or change activities. It should also save session history locally, let people export their notes, and support dark mode and light mode. Make it installable like a PWA and keep the experience calm, supportive, and easy to use on phone or desktop.

If you need current docs for any libraries or best practices, look them up online first.