Implement bank transfer app flows

Thijooree iOS/Storage/SavedContactsStore.swift

@@ -0,0 +1,41 @@
+import Foundation
+
+// Locally persisted contacts saved from transfer receipts.
+// Encrypted with AES-256-GCM via CacheEncryption, stored in UserDefaults.
+struct SavedContactsStore {
+    static let shared = SavedContactsStore()
+    private let udKey = "thijooree_saved_contacts_v1"
+    private init() {}
+
+    func save(_ contact: BankContact) {
+        var contacts = load()
+        // Replace existing entry for the same account+source, then prepend (most-recent-first)
+        contacts.removeAll { $0.benefAccount == contact.benefAccount && $0.source == contact.source }
+        contacts.insert(contact, at: 0)
+        if contacts.count > 100 { contacts = Array(contacts.prefix(100)) }
+        persist(contacts)
+    }
+
+    func load() -> [BankContact] {
+        guard let encrypted = UserDefaults.standard.string(forKey: udKey),
+              let json = try? CacheEncryption.shared.decryptData(encrypted),
+              let contacts = try? JSONDecoder().decode([BankContact].self, from: json) else { return [] }
+        return contacts
+    }
+
+    func delete(id: String) {
+        var contacts = load()
+        contacts.removeAll { $0.id == id }
+        persist(contacts)
+    }
+
+    func clear() {
+        UserDefaults.standard.removeObject(forKey: udKey)
+    }
+
+    private func persist(_ contacts: [BankContact]) {
+        guard let json = try? JSONEncoder().encode(contacts),
+              let encrypted = try? CacheEncryption.shared.encryptData(json) else { return }
+        UserDefaults.standard.set(encrypted, forKey: udKey)
+    }
+}