🚀 Features

• UI: Introduced Simple and Professional UX modes. Simple mode focuses on quick adjustments (Brightness, Contrast, Warmth, Intensity), while Professional mode offers full physics-based control.
• UI: Added Split-Screen Comparison view in the central panel for side-by-side before/after comparison.
• UI: Implemented async Preset Thumbnails in the controls panel for visual preview of film stocks.
• Processor: Added warmth and saturation parameters to the simulation engine.
• UI: Added persistency for UX mode preference in config.json.
• UI: Optimized top bar layout with direct mode toggles.

🐛 Fixes

• Metrics: Fixed incorrect metrics display logic and optimized metrics panel visibility for different modes.
• UI: Fixed control panel layout issues and improved visual hierarchy with better spacing and grouping.

⚠ Breaking Changes

• Core: Refactored FilmStock struct to embed manufacturer and name fields directly, removing the need for external name management. Updated get_all_stocks to return Vec<FilmStock> instead of tuples.