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/KanbanApp.swift

@@ -41,14 +41,21 @@ struct KanbanApp: App {
     private let launchPlan: LaunchPlan
 
     init() {
-        // Read first, because it decides *which registry file the model is built with* — a fixture
-        // launch keeps its recents in the scratch directory rather than in the user's real one.
+        // Read first, because it decides *which app-side state the model is built over* — a fixture
+        // launch keeps its recents and its clipboard snapshots in the scratch directory rather than in
+        // the shared App Group container.
         let isUITestFixtureLaunch = UITestLaunch.isFixtureLaunch
-        let registryStorageURL = isUITestFixtureLaunch
-            ? UITestLaunch.prepareScratchDirectory()
-            : BoardRegistry.defaultStorageURL
-
-        let model = AppModel(registryStorageURL: registryStorageURL)
+        if isUITestFixtureLaunch {
+            UITestLaunch.prepareScratchDirectory()
+        }
+        let model = AppModel(
+            registryStorageURL: isUITestFixtureLaunch
+                ? UITestLaunch.registryStorageURL
+                : BoardRegistry.defaultStorageURL,
+            clipboardStagingRoot: isUITestFixtureLaunch
+                ? UITestLaunch.clipboardStagingRoot
+                : ClipboardStore.defaultStagingRoot
+        )
         _appModel = State(initialValue: model)
         launchPlan = LaunchPlan.decide(
             isUITestFixtureLaunch: isUITestFixtureLaunch,