Bind independent Tailnet connections to group IDs while preserving legacy host identities through the V3 sync format. Persist profile cleanup retries, isolate test storage, and reject stale dialers after re-enrollment.
Recover quarantined sync records safely, refresh metrics compatibility, fix multiline shell history, and remove obsolete mobile history gates. Pin libtailscale-spm to 1.0.1 alongside its submodule revision.
Validation: default macOS suites (2679 tests), targeted iOS suites (26 tests), strict Swift formatting, shared AppStrings checks, and Chinese localization checks passed. Both subagent reviews approved.