v2.0.1 — Code quality pass

🛠️ Code quality pass: critical fixes & stability hardening

This release focuses on stability and robustness — no new user-facing features, but the app is now significantly more reliable.

🔴 Critical fixes

• Debate engine completely rewritten as a stateful class
  • Eliminates Swift 6 Sendable warnings (captured var in concurrent closures)
  • Validates each cat still exists before its turn — survives mid-debate cat removal
  • Generation counter invalidates stale callbacks if the debate is stopped
  • DispatchQueue.main.asyncAfter instead of Timer.scheduledTimer from URLSession queue (was undefined behavior)
  • Public stop() called from removeCat and applicationWillTerminate
• Debate button now appears reliably — a didSet observer on debateEnabled rebuilds the bubble
• OllamaChat session race fixed — delegate no longer nullifies a newer in-flight session
• fatalError at startup → NSAlert with a clear message + terminate (assets missing / no screen)

🟠 Memory & performance

• tintCache bounded with NSCache (600 items) — was a dictionary growing unbounded
• getPreview tinted images now cached
• Orphan mem_<UUID> entries in UserDefaults purged at startup
• URLSession properly finishTasksAndInvalidate()d (delegate was leaking)
• frontmostWindowFrame cached 200 ms — reduces CGWindowListCopyWindowInfo calls

🟡 Polish

• addCat captures the new instance directly and rolls back the config on failure (no more last!)
• appendResponse no longer steals focus to the input field if the user wasn't focused there
• BehaviorTuning enum centralizes all AI tuning magic numbers
• Dictionary.localized() helper dedupes the [lang] ?? ["fr"] ?? "" pattern

Build

• Zero warnings, zero errors

Install

unzip CATAI.zip
xattr -cr CATAI.app   # remove macOS quarantine (app is unsigned)
open CATAI.app

Full changelog: v2.0...v2.0.1