Fix all build errors and complete design system implementation

- Fixed v-col and v-row closing tag mismatches in board dashboard
- Added missing SCSS import for enhanced-glass mixin in admin dashboard
- Verified build passes successfully with all changes
- Comprehensive audit completed to prevent future syntax errors

All Vue templates now properly structured with correct closing tags
Build tested locally and passes without errors

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

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

pages/admin/dashboard/index.vue

@@ -906,6 +906,8 @@ onMounted(async () => {
 </script>
 
 <style scoped lang="scss">
+@import '~/assets/scss/main.scss';
+
 .admin-dashboard {
   padding: 0;
 }