feat(fleet): integrate trip management and fee coverage workflows

src/modules/overseas-warehouse/dispatchPhysicalWeight.ts

@@ -0,0 +1,22 @@
+const kilogramsToPounds = 2.2046226218
+
+export function physicalWeightKg(value: unknown): number | null {
+  if (value == null || value === '') return null
+  const number = Number(value)
+  return Number.isFinite(number) && number > 0 ? number : null
+}
+
+export function physicalWeightLb(value: unknown): number | null {
+  const weight = physicalWeightKg(value)
+  return weight === null ? null : weight * kilogramsToPounds
+}
+
+export function totalPhysicalWeightLb(items: readonly ({ grossWeightKg?: number | null } | undefined)[]): number | null {
+  let total = 0
+  for (const item of items) {
+    const weight = physicalWeightLb(item?.grossWeightKg)
+    if (weight === null) return null
+    total += weight
+  }
+  return total
+}