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/ChatPresentationInterfaceState/Sources/ChatMediaInputNodeInteraction.swift

@@ -1,5 +1,4 @@
 import Foundation
-import Postbox
 import TelegramCore
 import TelegramUIPreferences
 
@@ -22,27 +21,27 @@ public enum ChatMediaInputGifMode: Equatable {
 }
 
 public final class ChatMediaInputNodeInteraction {
-    public let navigateToCollectionId: (ItemCollectionId) -> Void
+    public let navigateToCollectionId: (EngineItemCollectionId) -> Void
     public let navigateBackToStickers: () -> Void
     public let setGifMode: (ChatMediaInputGifMode) -> Void
     public let openSettings: () -> Void
-    public let openTrending: (ItemCollectionId?) -> Void
-    public let dismissTrendingPacks: ([ItemCollectionId]) -> Void
+    public let openTrending: (EngineItemCollectionId?) -> Void
+    public let dismissTrendingPacks: ([EngineItemCollectionId]) -> Void
     public let toggleSearch: (Bool, ChatMediaInputSearchMode?, String) -> Void
     public let openPeerSpecificSettings: () -> Void
     public let dismissPeerSpecificSettings: () -> Void
     public let clearRecentlyUsedStickers: () -> Void
     
     public var stickerSettings: ChatInterfaceStickerSettings?
-    public var highlightedStickerItemCollectionId: ItemCollectionId?
-    public var highlightedItemCollectionId: ItemCollectionId?
+    public var highlightedStickerEngineItemCollectionId: EngineItemCollectionId?
+    public var highlightedEngineItemCollectionId: EngineItemCollectionId?
     public var highlightedGifMode: ChatMediaInputGifMode = .recent
     public var previewedStickerPackItemFile: TelegramMediaFile?
     public var appearanceTransition: CGFloat = 1.0
     public var displayStickerPlaceholder = true
     public var displayStickerPackManageControls = true
     
-    public init(navigateToCollectionId: @escaping (ItemCollectionId) -> Void, navigateBackToStickers: @escaping () -> Void, setGifMode: @escaping (ChatMediaInputGifMode) -> Void, openSettings: @escaping () -> Void, openTrending: @escaping (ItemCollectionId?) -> Void, dismissTrendingPacks: @escaping ([ItemCollectionId]) -> Void, toggleSearch: @escaping (Bool, ChatMediaInputSearchMode?, String) -> Void, openPeerSpecificSettings: @escaping () -> Void, dismissPeerSpecificSettings: @escaping () -> Void, clearRecentlyUsedStickers: @escaping () -> Void) {
+    public init(navigateToCollectionId: @escaping (EngineItemCollectionId) -> Void, navigateBackToStickers: @escaping () -> Void, setGifMode: @escaping (ChatMediaInputGifMode) -> Void, openSettings: @escaping () -> Void, openTrending: @escaping (EngineItemCollectionId?) -> Void, dismissTrendingPacks: @escaping ([EngineItemCollectionId]) -> Void, toggleSearch: @escaping (Bool, ChatMediaInputSearchMode?, String) -> Void, openPeerSpecificSettings: @escaping () -> Void, dismissPeerSpecificSettings: @escaping () -> Void, clearRecentlyUsedStickers: @escaping () -> Void) {
         self.navigateToCollectionId = navigateToCollectionId
         self.navigateBackToStickers = navigateBackToStickers
         self.setGifMode = setGifMode