some fixes

Sources/Shared/Models/ArchiveMessageBatchPolicy.swift

@@ -4,14 +4,14 @@ import Foundation
 /// still published atomically; these values only bound network and decryption
 /// work performed before that publication.
 enum ArchiveMessageBatchPolicy {
-    static let pageSize = 24
+    static let pageSize = 40
     static let bootstrapMessageLimit = 40
     /// Decrypt this many archived stanzas per main-actor slice before yielding.
     /// One-by-one decryption turns a large MAM catch-up into hours of serialized
     /// work; a small batch keeps frames mostly intact while cutting the number
     /// of run-loop hand-offs by the same factor.
     static let decodeSliceSize = 8
-    static let maximumBufferedStanzas = 48
+    static let maximumBufferedStanzas = 96
     /// A short yield between archived decryption slices keeps touch handling
     /// responsive without the 8 ms per single message that previously dominated
     /// catch-up time.