🎨 refactor: Setup Wizard UI & Clean Up Redundant Code

Summary of changes
1. SetupWizard.jsx
   • Center card (`min-h-screen flex items-center justify-center`) and remove top margin.
   • Merge step indicator/content into single card; added `Divider` separator.
   • Added sweep-shine animation to current step title via existing `shine-text` class.
   • Simplified imports (removed Avatar / Typography) and deleted unused modal state.

2. Step components
   • Stripped outer `Card` and header sections from `DatabaseStep.jsx`, `AdminStep.jsx`, `UsageModeStep.jsx`, `CompleteStep.jsx` to fit single-card layout.
   • Removed unused imports and props.

3. Components cleanup
   • Deleted obsolete files:
     - `components/setup/components/SetupSteps.jsx`
     - `components/setup/components/modals/UsageModeInfoModal.jsx`
   • Updated `setup/index.jsx` exports accordingly.

4. Styling
   • Ensured global sweep-shine effect already present in `index.css` is reused for step titles.

5. i18n
   • Pruned unused translation keys related to removed components from `i18n/locales/en.json`.

6. Miscellaneous
   • Removed redundant Avatar/Icon imports from multiple files.
   • All linter checks pass with no new warnings.

This commit consolidates the initialization flow into a cleaner, centered single-card wizard, adds visual polish, and reduces dead code for easier maintenance.

web/src/components/topup/InvitationCard.jsx

@@ -54,7 +54,7 @@ const InvitationCard = ({
       {/* 收益展示区域 */}
       <div className='space-y-4'>
         {/* 主要收益卡片 - 待使用收益 */}
-        <Card className='!rounded-xl with-pastel-balls'>
+        <Card className='!rounded-xl'>
           <div className='flex justify-between items-center mb-3'>
             <div className="flex items-center">
               <TrendingUp size={16} className="mr-2 text-slate-600 dark:text-slate-300" />