Home app-side state in the shared App Group container

Every edition declares group.dev.rzen.indie.Kanban and homes its
app-side state there from day one (12-editions.md ruling 2026-07-29):

- AppGroup namespace: container resolution with per-edition fallback
  when unprovisioned, shared UserDefaults suite, edition identity, and
  a unit-test-host redirect (the test host IS the app — its launch
  sweep and recents refresh must not touch the real shared container).
- BoardRecord: bookmark/isOpenNow replaced by per-edition grants and
  openNow keyed by bundle id; hand-written Codable keeps legacy keys
  decoding (adopted in memory as the running edition's slots, upgraded
  on first save); every other field stays common.
- RecentBoard gains needsReopen: no grant of ours but somebody's —
  first click runs an open panel pre-anchored at the recorded path,
  prompt "Grant"; recordOpen mints this edition's slot onto the
  matched shared record (path fallback only after identity fails and
  only against records holding no grant of ours, so re-granting never
  forks the record).
- Cross-edition freshness: stat-cheap mtime+size stamp re-reads the
  registry when the sibling edition wrote it, so one edition's save
  never erases the other's records wholesale.
- restorables() filters on this edition's open-now flags; the board
  popover gains BoardEditionPresence ("Also open in Lanework Pro"),
  pid-liveness-checked so crash residue never lies.
- Clipboard staging store moves to the group container; the sweep
  claims doomed trees by atomic rename into .sweeping/ then deletes,
  so the sibling's concurrent sweep is a non-event.
- Template store re-homed to the group container per the 09-templates
  re-ruling; scalars (quick-style recents, window size) move to the
  shared suite.
- verify-editions.sh: 30 checks (each edition carries exactly the
  family group). No pathfinder 1.x migrator: 1.x predates the
  registry; state starts fresh in the group container.

Claude-Session: https://claude.ai/code/session_01SR4XGjmBE16ZUYWpfFHXwY

Kanban/LiveStore/StyleRecents.swift

@@ -46,8 +46,10 @@ public final class StyleRecents {
     private static let logger = Logger(subsystem: "dev.rzen.indie.Kanban", category: "style-recents")
 
     /// - Parameter defaults: the domain to persist in. Injected for the reason `BoardRegistry` takes
-    ///   its storage URL: a test must be able to hold its own without touching the user's.
-    public init(defaults: UserDefaults = .standard) {
+    ///   its storage URL: a test must be able to hold its own without touching the user's. The app's
+    ///   own is the **group's shared suite** (02-architecture.md § Per-board app state, ruled
+    ///   2026-07-29), so the row an upgrader built up in base is the row Pro offers.
+    public init(defaults: UserDefaults = AppGroup.defaults) {
         self.defaults = defaults
         // Anything but an array of strings is treated as an empty list rather than as an error: this
         // is a convenience, and a hand-edited or truncated preference must never be the reason a