isaac b8ee5493d9 Postbox refactor waves 427-437: combinedView → engine.data migrations ... Squashed batch of 14 consumer-side migrations from Postbox combinedView/subscribe patterns to TelegramEngine.data.subscribe / .get, plus two engine-data-item additions. - Wave 427: DataAndStorageSettingsController preferences subscribe - Wave 428: SaveIncomingMediaController inner preferences subscribe - Wave 429: SaveIncomingMediaController top-level preferences subscribe - Wave 430 (reverted + retried as 430-retry): initial TabBarChatListFilterController globalNotifications attempt landed and was reverted; replaced by ChatControllerContentData messageAndTopic collapse via additive Messages.MessageCount handleThreads/namespace parameter - Wave 431: ChatControllerContentData savedMessagesPeer collapse via new Peer.MainPeer(id:) engine data item - Wave 432 (+ followup): 6 messageHistoryThreadInfo sites to Messages.ThreadInfo - Wave 433: ChatListController cachedPeerData → engine.data.get - Wave 434: 8 orderedItemList sites to Collections.Featured*Packs - Wave 435: StorageUsageExceptionsScreen preferences combinedView - Wave 436: FeaturedStickersScreen 2 itemCollectionInfos sites - Wave 437: extends Messages.PeerUnreadCount with handleThreads parameter + migrates AccountContext unreadCount site		2026-05-20 00:18:15 +08:00
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StickerPickerScreen.swift	Postbox refactor waves 427-437: combinedView → engine.data migrations	2026-05-20 00:18:15 +08:00