Supertamer dev-20260904b (build 28) — Browse Documents and Canons across threads

The Threads screen becomes a three-way switch over the same shelf: Threads | Documents | Canons. The two new faces list every Document and every canon item on this Mac, grouped under sticky thread headers in the thread list's own order, with the shared filter narrowing whichever face is showing and empty groups left out. A row expands in place — one open per view; the strip down the expanded content's left edge closes it and doubles as the indent; opening another row folds the first in the same beat, with focus following the newly opened row. A canon row expands to its full detail, a Document row to its rendered body, and a group header enters the thread on the matching tab.

Installing over build 25 through 27 needs no migration; over build 24 or older the app migrates automatically on first launch and takes a pre-migration backup first. Update both Macs together so sync keeps flowing.

Private source commit: 96912f69dc137af5824632db4778504618540858
Supertamer.zip SHA-256: 1559831b70147a23ead629f8a33f093e25be46cf14126e1662a12654267dfa33
Build: 28