🎨 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/index.css

@@ -52,7 +52,7 @@ code {
 }
 
 /* ==================== 导航和侧边栏样式 ==================== */
-/* 导航项样式 */
+.semi-radio,
 .semi-tagInput,
 .semi-input-textarea-wrapper,
 .semi-navigation-sub-title,