Expand onboarding and adaptive keyboard intelligence

Add resilient usage analytics, OOBE gateway flows, clipboard semantic ranking, purchase recovery, style learning, and managed current-information search.

OSGKeyboardShared/Features/ManagedGateway/ManagedGatewayAccountAccessPolicy.swift

@@ -0,0 +1,40 @@
+// ManagedGatewayAccountAccessPolicy.swift
+// OSGKeyboard · Shared
+//
+// Device-local account-session gate for account-funded managed requests.
+// The marker is intentionally non-secret and is never part of iCloud settings.
+
+import Foundation
+
+public protocol ManagedGatewayAccountAccessAuthorizing: Sendable {
+    func allowsAccountManagedAccess() -> Bool
+}
+
+/// Production policy shared by the host and keyboard extension. A cached grant
+/// alone is insufficient: the host must also have confirmed an account session.
+public struct AppGroupManagedGatewayAccountAccessPolicy:
+    ManagedGatewayAccountAccessAuthorizing,
+    @unchecked Sendable {
+    private let defaults: UserDefaults?
+
+    public init(defaults: UserDefaults? = AppGroup.defaultsIfAvailable) {
+        self.defaults = defaults
+    }
+
+    public func allowsAccountManagedAccess() -> Bool {
+        defaults?.bool(
+            forKey: AppGroupConfiguration.Keys.managedGatewayAccountSessionAvailable
+        ) == true
+    }
+}
+
+/// Anonymous OOBE grants have their own bounded practice-session policy and do
+/// not represent account-funded access. Tests may also inject this explicitly.
+public struct UnrestrictedManagedGatewayAccountAccessPolicy:
+    ManagedGatewayAccountAccessAuthorizing {
+    public init() {}
+
+    public func allowsAccountManagedAccess() -> Bool {
+        true
+    }
+}