fix: improve shadow contrast without background overlay

- Increase shadow opacity from 0.5 to 0.8 for better readability
- Revert semi-transparent background approach per user feedback
- Keep debugging logs to diagnose color detection

src/hooks/useAdaptiveTextColor.ts

@@ -58,13 +58,13 @@ export function useAdaptiveTextColor(imageUrl: string | undefined): AdaptiveText
           console.log('Light background detected, using black text')
           setColors({
             textColor: '#000000',
-            shadowColor: 'rgba(255, 255, 255, 0.5)'
+            shadowColor: 'rgba(255, 255, 255, 0.8)'
           })
         } else {
           console.log('Dark background detected, using white text')
           setColors({
             textColor: '#ffffff',
-            shadowColor: 'rgba(0, 0, 0, 0.5)'
+            shadowColor: 'rgba(0, 0, 0, 0.8)'
           })
         }
       } catch (error) {