feat: detect duplicate measurement dates, ask to overwrite

src/database/db.ts

@@ -47,6 +47,15 @@ export async function getLatestMeasurement(): Promise<Measurement | null> {
   return rows.length > 0 ? (rows[0] as Measurement) : null
 }
 
+export async function getMeasurementByDate(date: string): Promise<Measurement | null> {
+  const day = date.slice(0, 10)
+  const rows = await db!.getAllAsync<any>(
+    "SELECT * FROM measurements WHERE measuredAt LIKE ? LIMIT 1",
+    [`${day}%`]
+  )
+  return rows.length > 0 ? (rows[0] as Measurement) : null
+}
+
 export async function updateMeasurement(id: string, syncStatus: SyncStatus): Promise<void> {
   await db!.runAsync(
     'UPDATE measurements SET syncStatus = ?, updatedAt = ? WHERE id = ?',