AI Stability Improvements

Fixed: AI Repetition Loops

In rare cases, AI models (especially Gemini Flash) could get stuck in a loop, endlessly repeating the same text. This wasted credits and could freeze your browser with a gigantic message. We've shipped a multi-layer fix:

• Automatic loop detection - The AI now detects when it starts repeating itself and stops immediately, saving your credits.
• Tuned model settings - Adjusted temperature and repetition penalty parameters to prevent loops from starting in the first place.
• Large message protection - If a response is unusually long, it's now truncated in the UI with a "Show full message" button, preventing browser freezes.