v1.0.0-rc.2 — Sleep Debt fix

Fixed

• Sleep Debt card on Wellness page hardcoded 8h when the user's sleep goal was stored under .max (the default — "Minimum goal" toggle off in the goal editor). Code only checked .min, fell back to 480 minutes. Fix: use the same max ?? min ?? default fallback chain used elsewhere in the codebase (Goals.svelte, calorie targets, etc.). Users with custom sleep goals now see debt computed against their actual target.

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