[ethduke]

Summary

Track this Mac's configured-hotspot upload/download during active sessions, including local traffic, and save totals per network. Add a compact menu summary, budget settings and confirmed reset. Warn once at 80% and 100%; leave the connection running. Surface missing readings and storage errors. Also fix the Wi-Fi observer cleanup crash with a regression test.

Refs #53 — usage estimates and warnings; no hard cap or carrier billing measurement.

Validation

• Hosted CI passed on 579eed6 on macOS 26 and 27: 1,267 tests per OS, with 10 skipped and zero failures on each, plus release builds with warnings treated as errors. ShellCheck and workflow lint passed. CI results.
• 173 targeted local tests passed in the documented macOS 15 compatibility copy.
• Remaining hotspot device checks are listed in docs/releasing.md, with scoped development evidence in docs/release-validation.md. The two affected recovery-fixture tests also passed locally after the documentation conflict was resolved.
• Live Mac test recorded 47.12 MB with 4 MB of controlled downloads. macOS delivered separate warnings at 32.45 MB and 41.75 MB against a 40 MB budget. All 19 live checks passed.
• A paused 1 MB download was excluded; reload retained totals and warning history without duplicate alerts. 100 real observer start/stop cycles passed.

Limitations

Tested on macOS 15.6.1/M1 Max using documented scratch compatibility changes and production tracking/UI/notification components. Active session state was supplied without changing power settings. Full real-device keep-awake/app operation on supported macOS and actual phone-hotspot attribution remain unverified. Network interruptions are marked as unmeasured. Shell syntax passed locally; ShellCheck/workflow linters passed in hosted CI.

UI before / after

Native macOS 15 compatibility previews: before uses the baseline settings UI; after uses the current production UI with saved real-test totals.

Before: network settings only	After: usage, budget and warnings