mapStorageBytesForUi
Hides tiny iOS filesystem bookkeeping sizes from user-facing storage UI.
Raw filesystem methods still return values such as the 64-byte directory size reported by APFS, but usage screens should not present that as real cache or model data.
Return
Zero for sub-threshold residue, otherwise the original positive byte count.
Author
Dmitriy Moroz
Parameters
bytes
Raw filesystem byte count.