Supertamer dev-20260904 (build 27) — Thread surfaces polish

Five dogfooding fixes on the Thread surfaces. The Threads list is a uniform row list — category chip, title, one-line summary, re-entry signals, updated time and the #TH chip at one fixed height, replacing the ragged card grid. Canon titles read at list density instead of a size up. Document rows carry a bigger title with a two-line plain-text excerpt of the body (markers stripped server-side). A ledger block's title line now reads as the card's heading in both the Conversation feed and the ledger. Adding a reference no longer asks About/Consulted/Produced — one flat target list, and the reference list shows entities without role groupings (D-018; stored rows keep their old roles untouched).

Installing over build 25 or 26 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: da22362480bef7ad1c5b40a4ac0521603838fc2a
Supertamer.zip SHA-256: db4d4b5c379bee84e8dc5163a5958b14b35b119c4525712e4208b41363f5777c
Build: 27