Package 1.1.1: app as a payload with system ownership, CLI via postinstall

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -53,10 +53,12 @@ swift build                          # debug build of everything
 - Package: tools-version 6.0, Swift 5 language mode, macOS 14 minimum.
 - `build.sh` reads `CODESIGN_APP_IDENTITY`, `CODESIGN_PKG_IDENTITY`, `NOTARY_PROFILE` (and optional
   `CODESIGN_TEAM_ID`) from the environment or an untracked `build.env`. Never hard-code identities.
-- The PKG is payload-free (`pkgbuild --nopayload --scripts`): `pkg/postinstall` installs the CLI to
-  `/usr/local/bin` and the notarized, stapled app to `/Applications`. A payload's "." entry is recorded as
-  root:wheel for its install location, which would reset an existing `/usr/local/bin` (Homebrew) or
-  `/Applications` (root:admin 775). The app is notarized and stapled before packaging; the PKG after.
+- PKG layout: the app is a payload (`pkgbuild --root` with a staging `Applications/` that is really
+  root:admin 775 and `--ownership preserve`, `BundleIsRelocatable` false), so it gets a receipt and the
+  package records the system's own ownership. `--ownership recommended` would record Applications as
+  root:wheel — don't use it. The CLI is not a payload: the binary ships in Scripts and `pkg/postinstall`
+  copies it, because a `/usr/local/bin` payload entry would reset a Homebrew-owned folder. The build
+  verifies both BOM ownership entries. The app is notarized and stapled before packaging; the PKG after.
 - The app icon master is `Icon/AppIcon-1024.png`; `build.sh` generates `AppIcon.icns` from it. Don't redraw it.
 - Live tests are opt-in and write to queues: `CUPSKIT_LIVE_QUEUE=<queue>`, `CUPSKIT_LIVE_JOBS=<a>,<b>`,
   `CUPSKIT_LIVE_QUICK=<ricoh>,<generic>`. Use throwaway queues (e.g. `lpd://127.0.0.1/…`, paused) and