Water Intake Tracker
Log every glass and watch your day fill up. Your total is summed from an append-only ledger of sips — a quantity ledger, measured in millilitres.
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How it’s built
- Pattern: a quantity ledger — the same accounting archetype as the budget tool, but the unit is millilitres, not money.
- Derived totals: today’s total is summed over an append-only ledger of intake entries — never a counter we increment.
- Frontend: a discriminated-union view state and facade hook, styled entirely with the shared design-system tokens.