Demo tool

Pack-engine check: works with no code changes.

Gently: not a medical procedure. Listen to your body; pause or stop at any moment. Breath-holding and cold exposure are contraindicated for several conditions (cardiovascular, respiratory, pregnancy).

This tool exists only to prove that a new pack is added with a single JSON file and an i18n seed — no edits to app.py, templates, or JS.

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The timer walks through the steps automatically. You can switch manually and pause.