## Summary
- restore private-channel invitations for every active member
- keep owner/admin-only enforcement for elevated role grants, active
role changes, and removals
- preserve #4612's unrelated Desktop/mobile failure handling and
hardening
- add relay coverage for the ordinary actor/target role matrix
(`member`, `guest`, `bot`)
## Validation
- pre-push hook passed on `7de700e17642ad7e10155f9537033168d9249268`:
branch skew, Desktop checks/typecheck/tests/Tauri checks, mobile tests,
and Rust tests
- `cargo test -p buzz-test-client --test e2e_relay --no-run`
- `cargo fmt --all -- --check`
- `git diff --check`
- Donut and Mongo independently reviewed the cross-layer authorization
behavior; Donut's role-matrix coverage finding is addressed in this
revision
---------
Signed-off-by: Wes <wesbillman@users.noreply.github.com>
Co-authored-by: Carl <c7ebe626f000404285d3686e1dc74cc07cc60a9754a150041ba132e14bd3e2ec@buzz.block.builderlab.xyz>
This change requires an active owner or administrator for third-party
additions to private channels. The relay validator and transactional
database authority enforce the same rule, including removed-member
reactivation and role-change paths.
Idempotent self-target behavior remains available, while ordinary
members can no longer extend private-channel access to another identity.
## Testing
- `git diff --check
origin/main...codex/security-private-channel-invite-authority`
- Rebased onto `origin/main` at `5c98932`
- Full CI pending
Originating Buzz thread:
`buzz://message?channel=3928fe05-df61-4b5d-b9c7-d623b9b10ea1&id=3c6c02312f763fbe0d2bfc33a6c1a362f91d0354f3d18b039cf7a0558c1439d1`
---------
Signed-off-by: Jordan Mecom <jm@squareup.com>
Signed-off-by: Eli Foster <efoster@squareup.com>
Co-authored-by: Eli Foster <efoster@squareup.com>
