feat: update background gradients and presets in BackgroundImageSelector

- Adjusted gradient definitions for various themes to enhance visual appeal and consistency.
- Added new gradient presets (sunset, ocean, forest, galaxy) to the BackgroundContext for broader customization options.
- Cleaned up unused console logs in useBackgroundCycle for better performance and readability.

src/hooks/useBackgroundCycle.ts

@@ -29,11 +29,6 @@ export function useBackgroundCycle() {
     
     // Ajouter l'image personnalisée préservée si elle existe
     const preservedCustomUrl = localStorage.getItem('preservedCustomBackground');
-    console.log('Debug cycle:', {
-      currentBackground,
-      preservedCustomUrl,
-      localStorageKeys: Object.keys(localStorage)
-    });
     
     if (preservedCustomUrl && !BACKGROUND_CYCLE.includes(preservedCustomUrl)) {
       allBackgrounds.push(preservedCustomUrl);
@@ -67,33 +62,10 @@ export function useBackgroundCycle() {
       const nextNextBackground = allBackgrounds[nextNextIndex];
       const finalBackgroundImage = nextNextBackground === 'none' ? undefined : nextNextBackground;
       
-      console.log('Cycle result:', {
-        allBackgrounds,
-        currentIndex,
-        actualCurrentIndex,
-        nextIndex,
-        nextBackground,
-        backgroundImage,
-        currentBackground,
-        nextNextIndex,
-        nextNextBackground,
-        finalBackgroundImage
-      });
-      
       updateViewPreferences({ backgroundImage: finalBackgroundImage });
       return;
     }
     
-    console.log('Cycle result:', {
-      allBackgrounds,
-      currentIndex,
-      actualCurrentIndex,
-      nextIndex,
-      nextBackground,
-      backgroundImage,
-      currentBackground
-    });
-    
     updateViewPreferences({ backgroundImage });
   };