Applies the wave-11/12 AccountStateManager collapse pattern to
SelectablePeerNode. Module is now fully Postbox-free (source + BUILD).
- SelectablePeerNode.setup(... postbox: Postbox, network: Network, ...)
-> setup(... stateManager: AccountStateManager, ...). Same for
setupStoryRepost. AvatarNode.setPeer and EmojiStatusComponent are
forwarded as stateManager.postbox / .network without naming Postbox.
- Three Namespaces.Peer.SecretChat == checks rewritten to use the
existing PeerId.isSecretChat extension (as in wave 13).
- ShareControllerPeerGridItem.setup / setupStoryRepost and
HorizontalPeerItem.setup call sites collapse to stateManager:.
JoinLinkPreviewPeerContentNode uses the convenience
setup(context: AccountContext) and is unchanged.
- Drop import Postbox in SelectablePeerNode.swift and the
//submodules/Postbox:Postbox dep in SelectablePeerNode/BUILD.
The stateManager fallback (over the normally-preferred engine:
TelegramEngine) is used because SelectablePeerNode crosses the Share
Extension boundary: ShareControllerAccountContextExtension has no
Account, so TelegramEngine(account:) is physically unreachable there.
This matches the "rare but genuine fallback" clause of
feedback_postbox_refactor_handle.md.
Build verified green (debug_sim_arm64, 193 actions).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
