Postbox refactor waves 138–276: 168-commit squash

Consolidates 137 wave commits + 31 supporting commits (CLAUDE.md bump,
typealias additions, AnyObject→EngineMedia restoration) into one squashed
commit. Migrates dozens of consumer-side public APIs, struct fields,
protocol methods, and enum payloads from Postbox protocols/structs to
TelegramEngine engine wrappers and typealiases. Drops `import Postbox`
from many files. Adds new TelegramCore typealiases and one
TelegramEngineUnauthorized facade.

Notable changes by category:

**TelegramCore typealias additions** (rule 2 — narrow utility typealiases):
- EngineChatListIndex, EngineTempBoxFile, EngineItemCollectionItemIndex,
  EngineItemCollectionViewEntryIndex, EngineValueBoxEncryptionParameters,
  EngineMessageAndThreadId, EnginePeerStoryStats, EngineMessageHistoryAnchorIndex,
  EngineChatListTotalUnreadStateCategory, EngineChatListTotalUnreadStateStats,
  EnginePeerSummaryCounterTags, EngineChatListTotalUnreadState,
  EngineItemCacheEntryId, EngineHashFunctions,
  EngineCachedMediaResourceRepresentationResult,
  EngineMediaResourceDataFetchResult, EngineMediaResourceDataFetchError,
  EngineMediaResourceStatus, EngineCachedPeerData

**TelegramCore engine extensions/forwarders**:
- EngineMessage.engineMedia, EngineMessage.enginePeers,
  EngineMessage.adAttribute, EngineMessage.effectivelyIncoming
- engineFileSize forwarder
- TelegramEngine.Resources.clearCachedMediaResources(mediaResourceIds: Set<EngineMediaResource.Id>)
- TelegramEngine.Resources.fetchStatus(id:resourceSize:)
- TelegramEngineUnauthorized.UnauthorizedResources facade with storeResourceData

**Public API/struct migrations to engine types**:
- ChatAvailableMessageActions.banAuthor/banAuthors → EnginePeer?/[EnginePeer]
- WebSessionsContextState.peers → [EnginePeer.Id: EnginePeer]
- CacheUsageStats.peers → [EnginePeer.Id: EnginePeer]
- PeerCommand.peer → EnginePeer
- PeerInfoControllerMode.calls(messages:) → [EngineMessage]
- CallControllerNodeProtocol.updatePeer → EnginePeer params
- ChatHistoryListNode.messageInCurrentHistoryView (and 4 variants) → EngineMessage?
- ChatHistorySearchContainerNode.messageForGallery → EngineMessage?
- PeerInfoPaneNode.findLoadedMessage / ensureMessageIsVisible /
  transitionNodeForGallery → engine-typed
- GalleryHiddenMediaTarget.getTransitionInfo /
  GalleryHiddenMediaManager.findTarget → engine-typed
- ChatPanelInterfaceInteraction.presentReactionDeletionOptions /
  presentBan*MessageOptions → EnginePeer
- DrawingMessageRenderer.messages → [EngineMessage]
- ChatVideoGalleryItemScrubberView.setFetchStatusSignal →
  EngineMediaResource.FetchStatus
- ChannelDiscussionGroupActionSheetItem.peer, VoiceChatPeerEntry.peer,
  VoiceChatFullscreenParticipantItem.peer, MediaStreamComponent.chatPeer,
  MediaStreamVideoComponent.callPeer, ChatMessageContactBubbleContentNode.contactPeer,
  ChatMessageForwardInfoNode.peer, ChatMessageCommentFooterContentNode.replyPeers,
  ChatReportPeerTitlePanelNode.peer, ChatMessageActionUrlAuthController.bot,
  PeerMediaCollectionInterfaceState.peer, ChatMessageCallBubbleContentNode.peopleAvatars,
  ChatLoadingNode.renderedPeer (→ EngineRenderedPeer) — all to engine types

**Wave-71-shadow stored-field migrations** (Postbox Peer/Message → Engine wrapper):
- LegacyCallControllerNode.peer
- CallStatusBarNode.currentPeer

**Dead-code / dead-field removals**:
- CallController.peer, CallControllerNodeV2.account,
  ContactMultiselectionController PeerNameIndex fields,
  preparedChatListNodeViewTransition account: Account param,
  FetchResource.swift entirely (unused function)

**Module-level Postbox import drops**: 30+ files including TelegramRootController,
EditStories, GiftViewScreen, AnimatedStickerUtils, FetchPhotoLibraryImageResource,
PeerInfoGiftsPaneNode, PeerInfoPaneContainerNode, PresentAddMembers,
PeerInfoProfileItems, ChatControllerAdminBanUsers, PresentationData typealiases,
DefaultDayPresentationTheme, ChatListViewTransition, GalleryHiddenMediaManager,
RecentSessionsController, GifContext, AuthorizationSequenceController,
PeerInfoHeaderEditingContentNode, PeerInfoHeaderNode,
PeerAllowedReactionListController, CallControllerNodeV2, and 6 PeerInfo pane files.

**AnyObject restoration**: rule 8 added (never substitute Postbox protocols
with Any/AnyObject) — undid previous AnyObject substitutions in waves 141/143
back to EngineMedia.

Doc maintenance: CLAUDE.md updated to reflect new typealiases and forwarders.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

submodules/TelegramBaseController/BUILD

@@ -11,7 +11,6 @@ swift_library(
     ],
     deps = [
     	"//submodules/SSignalKit/SwiftSignalKit:SwiftSignalKit",
-        "//submodules/Postbox:Postbox",
         "//submodules/TelegramCore:TelegramCore",
         "//submodules/AsyncDisplayKit:AsyncDisplayKit",
         "//submodules/Display:Display",

submodules/TelegramBaseController/Sources/LocationBroadcastActionSheetItem.swift

@@ -3,7 +3,6 @@ import UIKit
 import AsyncDisplayKit
 import Display
 import TelegramCore
-import Postbox
 import TelegramPresentationData
 import AccountContext
 import LiveLocationTimerNode
@@ -11,14 +10,14 @@ import AvatarNode
 
 public class LocationBroadcastActionSheetItem: ActionSheetItem {
     public let context: AccountContext
-    public let peer: Peer
+    public let peer: EnginePeer
     public let title: String
     public let beginTimestamp: Double
     public let timeout: Double
     public let strings: PresentationStrings
     public let action: () -> Void
     
-    public init(context: AccountContext, peer: Peer, title: String, beginTimestamp: Double, timeout: Double, strings: PresentationStrings, action: @escaping () -> Void) {
+    public init(context: AccountContext, peer: EnginePeer, title: String, beginTimestamp: Double, timeout: Double, strings: PresentationStrings, action: @escaping () -> Void) {
         self.context = context
         self.peer = peer
         self.title = title
@@ -105,7 +104,7 @@ public class LocationBroadcastActionSheetItemNode: ActionSheetItemNode {
         let textColor: UIColor = self.theme.primaryTextColor
         self.label.attributedText = NSAttributedString(string: item.title, font: defaultFont, textColor: textColor)
         
-        self.avatarNode.setPeer(context: item.context, theme: (item.context.sharedContext.currentPresentationData.with { $0 }).theme, peer: EnginePeer(item.peer))
+        self.avatarNode.setPeer(context: item.context, theme: (item.context.sharedContext.currentPresentationData.with { $0 }).theme, peer: item.peer)
         
         self.timerNode.update(backgroundColor: self.theme.controlAccentColor.withAlphaComponent(0.4), foregroundColor: self.theme.controlAccentColor, textColor: self.theme.controlAccentColor, beginTimestamp: item.beginTimestamp, timeout: Int32(item.timeout) == liveLocationIndefinitePeriod ? -1.0 : item.timeout, strings: item.strings)
     }