add deferral resurfacing to SyncCoordinator (task 7)

Import TaskStore, add optional taskStore property, add resurfaceDeferrals()
that clears expired email deferrals and deferred task deferUntil on each sync.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Packages/MagnumOpusCore/Sources/SyncEngine/SyncCoordinator.swift

@@ -2,6 +2,7 @@ import Foundation
 import Models
 import IMAPClient
 import MailStore
+import TaskStore
 
 @Observable
 @MainActor
@@ -10,6 +11,7 @@ public final class SyncCoordinator {
 	private let imapClient: any IMAPClientProtocol
 	private let store: MailStore
 	private let actionQueue: ActionQueue?
+	private let taskStore: TaskStore?
 	private var syncTask: Task<Void, Never>?
 
 	public private(set) var syncState: SyncState = .idle
@@ -19,12 +21,14 @@ public final class SyncCoordinator {
 		accountConfig: AccountConfig,
 		imapClient: any IMAPClientProtocol,
 		store: MailStore,
-		actionQueue: ActionQueue? = nil
+		actionQueue: ActionQueue? = nil,
+		taskStore: TaskStore? = nil
 	) {
 		self.accountConfig = accountConfig
 		self.imapClient = imapClient
 		self.store = store
 		self.actionQueue = actionQueue
+		self.taskStore = taskStore
 	}
 
 	public func onEvent(_ handler: @escaping (SyncEvent) -> Void) {
@@ -54,7 +58,31 @@ public final class SyncCoordinator {
 		}
 	}
 
+	private func resurfaceDeferrals() {
+		let now = ISO8601DateFormatter().string(from: Date())
+		do {
+			// Resurface deferred emails: delete deferral records so messages reappear in Inbox
+			let expiredDeferrals = try store.expiredDeferrals(beforeDate: now)
+			for deferral in expiredDeferrals {
+				try store.deleteDeferral(id: deferral.id)
+			}
+
+			// Resurface deferred tasks: clear deferUntil in cache and rewrite .ics files
+			let expiredTasks = try store.expiredDeferredTasks(beforeDate: now)
+			for task in expiredTasks {
+				try store.clearTaskDeferral(id: task.id)
+				try taskStore?.updateDeferral(id: task.id, deferUntil: nil, isSomeday: false)
+			}
+		} catch {
+			// Resurfacing is non-fatal; log and continue
+			print("[SyncCoordinator] resurfaceDeferrals error: \(error)")
+		}
+	}
+
 	private func performSync() async throws {
+		// Resurface any expired deferrals before processing new state
+		resurfaceDeferrals()
+
 		// Ensure account exists in DB
 		let existingAccounts = try store.accounts()
 		if !existingAccounts.contains(where: { $0.id == accountConfig.id }) {