fix(levels): reduce operator box sizes and remove divider line

- Reduced box dimensions from 200x180px to 170x150px for better fit
- Reduced grid gap from '3' to '2' for tighter layout
- Reduced box padding from '4' to '3' and gap from '2' to '1.5'
- Reduced maxW from 480px to 400px
- Changed my (margins) to py (padding) for more control
- Removed borderRight divider line between operator boxes and abacus

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

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

apps/web/src/app/levels/page.tsx

@@ -688,14 +688,12 @@ export default function LevelsPage() {
                           flex: '0 0 auto',
                           display: 'grid',
                           gridTemplateColumns: 'repeat(2, 1fr)',
-                          gap: sizing.gap,
-                          pr: '4',
+                          gap: '2',
+                          pr: '3',
                           pl: '2',
-                          borderRight: '1px solid',
-                          borderColor: 'gray.600',
-                          maxW: '480px',
+                          py: '2',
+                          maxW: '400px',
                           alignContent: 'center',
-                          my: '2',
                         })}
                       >
                         {sections.map((section, idx) => {
@@ -715,16 +713,16 @@ export default function LevelsPage() {
                                 border: '1px solid',
                                 borderColor: hasData ? 'gray.700' : 'gray.800',
                                 rounded: 'md',
-                                p: '4',
+                                p: '3',
                                 transition: 'all 0.2s',
                                 display: 'flex',
                                 flexDirection: 'column',
                                 alignItems: 'center',
                                 justifyContent: 'center',
-                                gap: '2',
+                                gap: '1.5',
                                 opacity: hasData ? 1 : 0.3,
-                                width: '200px',
-                                height: '180px',
+                                width: '170px',
+                                height: '150px',
                                 _hover: hasData
                                   ? {
                                       borderColor: 'gray.500',