Postbox -> TelegramEngine waves 107-137 (squashed)

31 waves of consumer-side migration from `import Postbox` to TelegramEngine
typealiases. Net: 173 import drops + 39 BUILD-dep drops + 1 new typealias
(`EngineStoryId = StoryId`, wave 113).

Wave shapes used:
- Orphan-import sweeps (107, 108, 128): drop `import Postbox` from files
  whose only Postbox-symbol reference was the import line itself, then
  resolve build failures. Methodology requires token-level (`grep -oE`)
  filtering, not line-level, to avoid masking real Postbox usage on lines
  that also contain `Namespaces.X` references.
- Identifier-swap mini-waves (109-127, 129-134, 136-137): rename
  Postbox-typealiased identifiers to engine equivalents
  (PeerId -> EnginePeer.Id, MessageId -> EngineMessage.Id,
  MediaId -> EngineMedia.Id, MessageIndex -> EngineMessage.Index,
  StoryId -> EngineStoryId, ItemCollectionId -> EngineItemCollectionId,
  PreferencesEntry -> EnginePreferencesEntry,
  FetchResourceSourceType/Error -> EngineFetchResourceSourceType/Error,
  MemoryBuffer -> EngineMemoryBuffer, MessageTags -> EngineMessage.Tags,
  MessageAttribute -> EngineMessage.Attribute,
  TempBox -> EngineTempBox).
- Asset-string FP-only orphans (124).
- Typealias addition + drain (113): added `EngineStoryId` typealias to
  TelegramCore, then drained 3+11 consumer sites.

Hard blockers identified during these waves (must restore `import Postbox`
when present): MediaResource[A-Za-z]* (any suffix -- the literal
`MediaResource` matches don't catch MediaResourceData/MediaResourceId/etc.),
Postbox/MediaBox/MediaResource raw types, PostboxCoding/PostboxEncoder/
PostboxDecoder, TempBoxFile, ValueBoxKey, PostboxView, combinedView,
HashFunctions, postboxLog, openPostbox, declareEncodable, PeerView,
MessageHistoryView, MessageHistoryThreadData, CachedPeerData, RenderedPeer,
SelectivePrivacyPeer, SimpleDictionary, ItemCollectionInfosView,
ItemCollectionItem, ItemCollectionItemIndex, ItemCollectionViewEntryIndex,
ChatListIndex, ChatListEntrySummaryComponents, CodableEntry,
MessageHistoryThread, MessageHistoryAnchorIndex,
MessageHistoryEntryLocation, PeerStoryStats, PeerNameIndex,
PeerSummaryCounterTags, ChatListTotalUnreadStateCategory/Stats,
arePeersEqual. Protocol-shape blockers: bare `Peer`/`Message`/`Media`
in function signatures, generic args, enum-case payloads, or dict value
types (e.g., `[PeerId: Peer]`, `case messages([Message])`,
`Signal<(Peer?, ...), NoError>`).

`replace_all PeerId -> EnginePeer.Id` is dangerous: mangles compound
names like `failedPeerId`, `ContactListPeerId`, `nextRemoteMediaId`,
`replyToMessageId`. Pre-flight grep `\b[a-z][a-zA-Z]*PeerId\b` and only
replace_all if 0 matches.

Also removes unneeded design/plan docs from a separate (link-highlighting)
feature branch:
- docs/superpowers/plans/2026-05-02-link-highlighting-modern-path-fixes.md
- docs/superpowers/specs/2026-05-02-link-highlighting-modern-path-fixes-design.md

Squashed commits: 6d82c2980d..e6de5d53a3 (59 commits, including
per-wave content commits and per-wave CLAUDE.md bumps).

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

submodules/TelegramCallsUI/Sources/CallRatingController.swift

@@ -4,7 +4,6 @@ import SwiftSignalKit
 import AsyncDisplayKit
 import Display
 import ComponentFlow
-import Postbox
 import TelegramCore
 import TelegramPresentationData
 import TelegramVoip
@@ -12,14 +11,14 @@ import AccountContext
 import AlertComponent
 
 func rateCallAndSendLogs(engine: TelegramEngine, callId: CallId, starsCount: Int, comment: String, userInitiated: Bool, includeLogs: Bool) -> Signal<Void, NoError> {
-    let peerId = PeerId(namespace: Namespaces.Peer.CloudUser, id: PeerId.Id._internalFromInt64Value(4244000))
+    let peerId = EnginePeer.Id(namespace: Namespaces.Peer.CloudUser, id: EnginePeer.Id.Id._internalFromInt64Value(4244000))
 
     let rate = engine.calls.rateCall(callId: callId, starsCount: Int32(starsCount), comment: comment, userInitiated: userInitiated)
     if includeLogs {
         let id = Int64.random(in: Int64.min ... Int64.max)
         let name = "\(callId.id)_\(callId.accessHash).log.json"
         let path = callLogsPath(account: engine.account) + "/" + name
-        let file = TelegramMediaFile(fileId: MediaId(namespace: Namespaces.Media.LocalFile, id: id), partialReference: nil, resource: LocalFileReferenceMediaResource(localFilePath: path, randomId: id), previewRepresentations: [], videoThumbnails: [], immediateThumbnailData: nil, mimeType: "application/text", size: nil, attributes: [.FileName(fileName: name)], alternativeRepresentations: [])
+        let file = TelegramMediaFile(fileId: EngineMedia.Id(namespace: Namespaces.Media.LocalFile, id: id), partialReference: nil, resource: LocalFileReferenceMediaResource(localFilePath: path, randomId: id), previewRepresentations: [], videoThumbnails: [], immediateThumbnailData: nil, mimeType: "application/text", size: nil, attributes: [.FileName(fileName: name)], alternativeRepresentations: [])
         let message = EnqueueMessage.message(text: comment, attributes: [], inlineStickers: [:], mediaReference: .standalone(media: file), threadId: nil, replyToMessageId: nil, replyToStoryId: nil, localGroupingKey: nil, correlationId: nil, bubbleUpEmojiOrStickersets: [])
         return rate
         |> then(enqueueMessages(account: engine.account, peerId: peerId, messages: [message])

submodules/TelegramCallsUI/Sources/Components/MessageItemComponent.swift

@@ -3,7 +3,6 @@ import Display
 import UIKit
 import ComponentFlow
 import SwiftSignalKit
-import Postbox
 import TelegramCore
 import AvatarNode
 import GlassBackgroundComponent
@@ -89,7 +88,7 @@ final class MessageItemComponent: Component {
         weak var standaloneReactionAnimation: StandaloneReactionAnimation?
         
         private var cachedEntities: [MessageTextEntity]?
-        private var entityFiles: [MediaId: TelegramMediaFile] = [:]
+        private var entityFiles: [EngineMedia.Id: TelegramMediaFile] = [:]
         
         private var component: MessageItemComponent?
         

submodules/TelegramCallsUI/Sources/PresentationCall.swift

@@ -1,6 +1,5 @@
 import Foundation
 import UIKit
-import Postbox
 import TelegramCore
 import SwiftSignalKit
 import Display

submodules/TelegramCallsUI/Sources/VoiceChatJoinScreen.swift

@@ -2,7 +2,6 @@ import Foundation
 import UIKit
 import Display
 import AsyncDisplayKit
-import Postbox
 import TelegramCore
 import SwiftSignalKit
 import TelegramPresentationData
@@ -22,7 +21,7 @@ public final class VoiceChatJoinScreen: ViewController {
     private var animatedIn = false
     
     private let context: AccountContext
-    private let peerId: PeerId
+    private let peerId: EnginePeer.Id
     private let invite: String?
     private var join: (CachedChannelData.ActiveCall) -> Void
     
@@ -30,7 +29,7 @@ public final class VoiceChatJoinScreen: ViewController {
     
     private let disposable = MetaDisposable()
     
-    public init(context: AccountContext, peerId: PeerId, invite: String?, join: @escaping (CachedChannelData.ActiveCall) -> Void) {
+    public init(context: AccountContext, peerId: EnginePeer.Id, invite: String?, join: @escaping (CachedChannelData.ActiveCall) -> Void) {
         self.context = context
         self.peerId = peerId
         self.invite = invite
@@ -132,7 +131,7 @@ public final class VoiceChatJoinScreen: ViewController {
                         return
                     }
                     
-                    let defaultJoinAsPeerId: PeerId? = callJoinAsPeerId
+                    let defaultJoinAsPeerId: EnginePeer.Id? = callJoinAsPeerId
                     
                     let activeCall = CachedChannelData.ActiveCall(id: call.info.id, accessHash: call.info.accessHash, title: call.info.title, scheduleTimestamp: call.info.scheduleTimestamp, subscribedToScheduled: call.info.subscribedToScheduled, isStream: call.info.isStream)
                     if availablePeers.count > 0 && defaultJoinAsPeerId == nil {
@@ -682,7 +681,7 @@ final class VoiceChatPreviewContentNode: ASDisplayNode, ShareContentContainerNod
     func deactivate() {
     }
     
-    func setEnsurePeerVisibleOnLayout(_ peerId: PeerId?) {
+    func setEnsurePeerVisibleOnLayout(_ peerId: EnginePeer.Id?) {
     }
     
     func setDidBeginDragging(_ f: (() -> Void)?) {