feat(account): add managed credits and cloud gateway

Introduce optional Apple account-backed credits with scoped gateway access while preserving local and BYOK paths. Refresh assistant behavior, tests, privacy disclosures, docs, and the website for the 2.0 experience.

OSGKeyboardShared/Utilities/KeyboardExtensionMemoryTelemetry.swift

@@ -5,8 +5,8 @@
 // The host process never starts this monitor, so shared typing code can emit
 // extension-only milestones without duplicating host telemetry.
 
-import Foundation
 import Darwin
+import Foundation
 
 public enum KeyboardExtensionMemoryBudget {
     /// Start preserving evidence before the extension reaches its safe ceiling.

OSGKeyboardShared/Utilities/OSGDiag.swift

@@ -5,8 +5,8 @@
 // Console without needing an os.Logger subsystem filter (keyboard extension
 // OSLog lines are easy to miss when the host process is selected).
 
-import Foundation
 import Darwin
+import Foundation
 
 public enum OSGDiag {
     public struct MemorySnapshot: Sendable, Equatable {

OSGKeyboardShared/Utilities/ProgressiveDictationTranscriptAccumulator.swift

@@ -5,8 +5,8 @@
 // Short-form presets may emit a new time range after ~30 s; treating the
 // latest partial as the full transcript drops earlier segments.
 
-import Foundation
 import CoreMedia
+import Foundation
 
 /// Combines volatile partials and finalized segments from
 /// `DictationTranscriber.results` into a single growing transcript.

OSGKeyboardShared/Utilities/UtteranceBatchFallbackPolicy.swift

@@ -13,8 +13,10 @@ public enum UtteranceBatchFallbackPolicy {
     public static func shouldRunBatchFallback(
         stitchedFinal: String,
         partialSnapshot: String,
+        recognitionFailed: Bool = false,
         minimumCharacterAdvantage: Int = defaultCharacterAdvantage
     ) -> Bool {
+        if recognitionFailed { return true }
         let final = stitchedFinal.trimmingCharacters(in: .whitespacesAndNewlines)
         let partial = partialSnapshot.trimmingCharacters(in: .whitespacesAndNewlines)