Bugfix: Remove custom timeout causing 1s deadline bug in GenAI SDK

Critical Fix: Actually update Visual Analyst to gemini-2.5-flash

Bugfix: Remove dynamic models/ string formatting in Vision Agent

Bugfix: Force embedding dimension to 768 and increase Vision timeout to 180s

Bugfix: Increase Vision timeout and migrate to gemini-embedding-001

Bugfix: Resolve GenAI SDK Pydantic validation and embedding model 404 errors

Tech Debt: Migrate to unified google-genai SDK

UI Update: Glassmorphism Design & Binary Cleanup