Postbox -> TelegramEngine wave 23: cancelInteractiveResourceFetch facade + consumer sweep

Adds TelegramEngine.Resources.cancelInteractiveResourceFetch(id:) and migrates 5 of 7 Shape-A
sites. Two sites in ChatMessageInteractiveMediaNode.swift skipped to avoid mixing with
pre-existing uncommitted WIP in that file.

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

CLAUDE.md

@@ -605,6 +605,29 @@ Net: 17 consumer files + 1 TelegramCore file + CLAUDE.md. TelegramEngineResource
 
 Plan / record: (no plan doc this wave — mechanical sweep following wave-21 recipe).
 
+### Wave 23 outcome (2026-04-21)
+
+Smallest wave so far: `cancelInteractiveResourceFetch` facade addition + consumer sweep. Same shape as waves 21/22.
+
+**Facade added at `TelegramCore/Sources/TelegramEngine/Resources/TelegramEngineResources.swift:468`.** Body: `self.account.postbox.mediaBox.cancelInteractiveResourceFetch(resourceId: MediaResourceId(id.stringRepresentation))`. Wraps Postbox's `MediaBox.cancelInteractiveResourceFetch(resourceId: MediaResourceId)` overload (the `_ resource: MediaResource` overload delegates to the id version anyway).
+
+**5 of 7 Shape-A consumer sites migrated:**
+- `PeerAvatarGalleryUI/Sources/PeerAvatarImageGalleryItem.swift` (1)
+- `GalleryUI/Sources/Items/ChatAnimationGalleryItem.swift` (1)
+- `GalleryUI/Sources/Items/ChatImageGalleryItem.swift` (1)
+- `GalleryUI/Sources/Items/ChatDocumentGalleryItem.swift` (1)
+- `GalleryUI/Sources/Items/ChatExternalFileGalleryItem.swift` (1)
+
+**2 sites intentionally skipped:** `ChatMessageInteractiveMediaNode.swift:1474, 1709` — this file has pre-existing uncommitted WIP (the `allowSticker` validation around secret-chat sticker playback, carried forward since before wave 17). Editing the 2 sites would mix my wave-23 changes with the user's WIP in a single git diff, which `git add` can't cleanly separate. Deferred until the WIP lands or a narrow follow-up wave intentionally includes both. Note: a future wave that aims to drop those 2 sites should first either (a) wait for the WIP to be committed or (b) use `git stash --keep-index` + targeted edits + selective staging to split the diff cleanly.
+
+**Pattern note on WIP interference.** This is the first wave to hit this failure mode — previous waves' mechanical sweeps happened not to touch `ChatMessageInteractiveMediaNode.swift`. Future sweeps should grep their candidate set against `git status`'s modified-files list before starting, and either (a) defer sites in WIP files, (b) wait for the WIP to commit, or (c) stage selectively via `git add --patch`-equivalent paths.
+
+**Build validation.** `bazel build Telegram/Telegram --keep_going` — clean first-pass build (558 processes, 1567 action cache hits + 19 local + 532 worker, 236s, 0 errors, `Telegram.ipa` up-to-date).
+
+Net: 5 consumer files + 1 TelegramCore file + CLAUDE.md. TelegramEngineResources.swift: +4 / -0. Consumer files: +5 / -5.
+
+Plan / record: (no plan doc this wave — mechanical sweep).
+
 ### Modules currently free of `import Postbox` (running tally)
 
 Consumer modules that no longer import Postbox, across all waves and standalone commits:

submodules/GalleryUI/Sources/Items/ChatAnimationGalleryItem.swift

@@ -341,7 +341,7 @@ final class ChatAnimationGalleryItemNode: ZoomableContentGalleryItemNode {
             if let resource = resource {
                 switch status {
                     case .Fetching:
-                        self.context.account.postbox.mediaBox.cancelInteractiveResourceFetch(resource.resource)
+                        self.context.engine.resources.cancelInteractiveResourceFetch(id: EngineMediaResource.Id(resource.resource.id))
                     case .Remote:
                     self.fetchDisposable.set(fetchedMediaResource(mediaBox: self.context.account.postbox.mediaBox, userLocation: (self.message?.id.peerId).flatMap(MediaResourceUserLocation.peer) ?? .other, userContentType: .file, reference: resource, statsCategory: statsCategory ?? .generic).start())
                     default:

submodules/GalleryUI/Sources/Items/ChatDocumentGalleryItem.swift

@@ -386,7 +386,7 @@ class ChatDocumentGalleryItemNode: ZoomableContentGalleryItemNode, WKNavigationD
         if let (context, fileReference) = self.contextAndFile, let status = self.status {
             switch status {
                 case .Fetching:
-                    context.account.postbox.mediaBox.cancelInteractiveResourceFetch(fileReference.media.resource)
+                    context.engine.resources.cancelInteractiveResourceFetch(id: EngineMediaResource.Id(fileReference.media.resource.id))
                 case .Remote:
                     self.fetchDisposable.set(fetchedMediaResource(mediaBox: context.account.postbox.mediaBox, userLocation: (self.message?.id.peerId).flatMap(MediaResourceUserLocation.peer) ?? .other, userContentType: .file, reference: fileReference.resourceReference(fileReference.media.resource)).start())
                 default:

submodules/GalleryUI/Sources/Items/ChatExternalFileGalleryItem.swift

@@ -320,7 +320,7 @@ class ChatExternalFileGalleryItemNode: GalleryItemNode {
         if let (context, fileReference) = self.contextAndFile, let status = self.status {
             switch status {
                 case .Fetching:
-                    context.account.postbox.mediaBox.cancelInteractiveResourceFetch(fileReference.media.resource)
+                    context.engine.resources.cancelInteractiveResourceFetch(id: EngineMediaResource.Id(fileReference.media.resource.id))
                 case .Remote:
                     self.fetchDisposable.set(fetchedMediaResource(mediaBox: context.account.postbox.mediaBox, userLocation: (self.message?.id.peerId).flatMap(MediaResourceUserLocation.peer) ?? .other, userContentType: .file, reference: fileReference.resourceReference(fileReference.media.resource)).start())
             default:

submodules/GalleryUI/Sources/Items/ChatImageGalleryItem.swift

@@ -1196,7 +1196,7 @@ final class ChatImageGalleryItemNode: ZoomableContentGalleryItemNode {
             if let resource = resource {
                 switch status {
                     case .Fetching:
-                        self.context.account.postbox.mediaBox.cancelInteractiveResourceFetch(resource.resource)
+                        self.context.engine.resources.cancelInteractiveResourceFetch(id: EngineMediaResource.Id(resource.resource.id))
                     case .Remote:
                     self.fetchDisposable.set(fetchedMediaResource(mediaBox: self.context.account.postbox.mediaBox, userLocation: (self.message?.id.peerId).flatMap(MediaResourceUserLocation.peer) ?? .other, userContentType: .image, reference: resource, statsCategory: statsCategory ?? .generic).start())
                     default:

submodules/PeerAvatarGalleryUI/Sources/PeerAvatarImageGalleryItem.swift

@@ -599,7 +599,7 @@ final class PeerAvatarImageGalleryItemNode: ZoomableContentGalleryItemNode {
         if let entry = self.entry, let largestSize = largestImageRepresentation(entry.representations.map({ $0.representation })), let status = self.status {
             switch status {
                 case .Fetching:
-                    self.context.account.postbox.mediaBox.cancelInteractiveResourceFetch(largestSize.resource)
+                    self.context.engine.resources.cancelInteractiveResourceFetch(id: EngineMediaResource.Id(largestSize.resource.id))
                 case .Remote:
                     let representations: [ImageRepresentationWithReference]
                     switch entry {

submodules/TelegramCore/Sources/TelegramEngine/Resources/TelegramEngineResources.swift

@@ -464,5 +464,9 @@ public extension TelegramEngine {
         public func storeResourceData(id: EngineMediaResource.Id, data: Data, synchronous: Bool = false) {
             self.account.postbox.mediaBox.storeResourceData(MediaResourceId(id.stringRepresentation), data: data, synchronous: synchronous)
         }
+
+        public func cancelInteractiveResourceFetch(id: EngineMediaResource.Id) {
+            self.account.postbox.mediaBox.cancelInteractiveResourceFetch(resourceId: MediaResourceId(id.stringRepresentation))
+        }
     }
 }