v0.31.1

Fixed

• Stopped GPT Image 2.5 / Flare from snapping the MODEL menu back to Nano Banana Pro after generate. Client BYOK provider resolution now recognizes openai-2.5 and openai-flare (so a shared OpenAI key counts), credit-funded picks are no longer auto-switched away when another provider key exists, and ImageDisplay refine sync keeps a valid toolbar selection instead of falling through to gemini.