1.6.7

Fix build with Swift 6.2 SDK by guarding iOS 26.4 token usage API with #if swift(>=6.3)

1.6.6

Update token usage format with context size percentage

1.6.5

• Replace character-based token estimation with SystemLanguageModel.tokenUsage(for:) API (iOS 26.4+)
• Extract shared TokenCounter helper
• Use .task modifier instead of onAppear + Task
• Use OSLog logger for error handling
• Use automatic inflection for token count pluralization