fix(immersive): increase crop sample size for more relevant colors

Zoom factor changed from 1.5-3x to 1.1-1.6x
Now samples 62-90% of image instead of 33-66%

src/lib/components/immersive/ImmersiveBackground.svelte

@@ -99,8 +99,8 @@
       const cropCtx = cropCanvas.getContext('2d');
       if (!cropCtx) { isLoading = false; return; }
 
-      // Zoom factor: 1.5x to 3x
-      const zoomFactor = 1.5 + rand() * 1.5;
+      // Zoom factor: 1.1x to 1.6x (takes 62%-90% of image for more relevant colors)
+      const zoomFactor = 1.1 + rand() * 0.5;
       const sourceSize = Math.min(img.width, img.height) / zoomFactor;
       const maxOffset = Math.min(img.width, img.height) - sourceSize;
 

src/lib/immersive/utils/texture-loader.ts

@@ -60,8 +60,8 @@ function extractRandomCrop(
 
   const rand = seededRandom(seed);
 
-  // Zoom factor: 1.5x to 3x (we take 33%-66% of the image)
-  const zoomFactor = 1.5 + rand() * 1.5;
+  // Zoom factor: 1.1x to 1.6x (we take 62%-90% of the image for more relevant colors)
+  const zoomFactor = 1.1 + rand() * 0.5;
 
   // Source region size (what portion of original image to take)
   const sourceSize = Math.min(img.width, img.height) / zoomFactor;