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Marc-André Bombeck
170862fdf8
The per-metric target editor receives a glucose range already projected into the user's display unit (mmol/L) along with `unit="mmol/L"`, but it seeded, validated and saved that value verbatim. HealthLog stores glucose canonically in mg/dL, so a user on the mmol/L preference either had a valid target (e.g. 3.9–5.5 mmol/L) rejected by the 40–400 mg/dL bounds, or — when an override already existed — saw a mg/dL number rendered as if it were mmol/L and wrote it straight back. Add `mmolToMgdl` / `toCanonicalMgdl` (the inverse of `convertGlucose`) and teach the edit sheet to treat the display unit at its boundary: seed the persisted mg/dL override into the display unit, validate against bounds expressed in the display unit, and convert the typed value back to canonical mg/dL before the PUT. A no-op for every non-glucose metric and for users on the mg/dL preference. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> (cherry picked from commit 0cc0361058a85f32d7135e5f2fd425c98f62d885)