fix: Reduce logo scale to prevent overlap with app title

- Changed logo scale from 3.5x to 1.5x in MobileHeader
- Changed logo scale from 3.5x to 1.5x in DesktopSidebar
- Prevents logo from overlapping with "Ponderants" title text
- Maintains proper spacing and visual hierarchy

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

components/Navigation/MobileHeader.tsx

@@ -28,7 +28,7 @@ export function MobileHeader() {
           <Image
             src="/logo.svg"
             alt="Ponderants logo"
-            style={{ width: '100%', height: '100%', transform: 'scale(3.5)' }}
+            style={{ width: '100%', height: '100%', transform: 'scale(1.5)' }}
           />
         </Box>
         <Text fw={700} size="lg">