[mikecerisano]

Expanded transfer details previously showed file counts and one overall speed, so a slow write and a slow verification read looked the same. The shared Mac/iPhone/iPad progress row now shows bytes written and read back, with a separate live rate for each local destination. The copy stage and active destination also appear while a large first file is still at 0 of 1 completed.

The meter counts successful destination I/O calls, including successful partial writes before a later write fails. Rechecking an existing file adds readback bytes but no new write bytes. Overlapping calls to one destination use their combined active interval, and rates expire when I/O stops or a pause begins; a resumed rate cannot include pre-pause samples. These are active file I/O rates, not full-transfer or durable-storage benchmarks. Transfer scheduling, source files, verification evidence, and safety verdicts are unchanged.

Local validation on the rebased branch:

• Full Mac app suite: 268 XCTest cases executed (12 skipped), plus 154 Swift Testing cases; zero failures, TEST SUCCEEDED.
• iPad Air 11-inch (M4) simulator suite: 65 Swift Testing cases passed; 9 XCTest cases skipped by the suite; TEST SUCCEEDED.
• Full engine suite: 129 XCTest cases executed (17 skipped), plus 179 Swift Testing cases; zero failures.
• Focused engine telemetry/fan-out suite: 30 passed, including first-file stage, file reuse, failed writes, concurrent I/O, and fast media.
• Focused Mac presentation suite: 25 passed. git diff --check is clean.

The first engine run inside the restricted tool sandbox could not mount disk images or access macOS bookmark/diagnostic services. The complete engine suite passed when rerun with those local services available. A physical-drive UI walkthrough remains for release validation.