feat: Nova UI component library + Studio dropdown/picker polish

- Add Nova UI library: Button, TextInput, Textarea, FormField, Select,
  NovaSelect, Checkbox, Radio/RadioGroup, Toggle, DatePicker,
  DateRangePicker, Modal + barrel index.js
- Replace all native <select> in Studio with NovaSelect (StudioFilters,
  StudioToolbar, BulkActionsBar) including frosted-glass portal and
  category group headers
- Replace native checkboxes in StudioGridCard, StudioTable, UploadSidebar,
  UploadWizard, Upload/Index with custom Checkbox component
- Add nova-scrollbar CSS utility (thin 4px, semi-transparent)
- Fix portal position drift: use viewport-relative coords (no scrollY offset)
  for NovaSelect, DatePicker and DateRangePicker
- Close portals on external scroll instead of remeasuring
- Improve hover highlight visibility in NovaSelect (bg-white/[0.13])
- Move search icon to right side in NovaSelect dropdown
- Reduce Studio layout top spacing (py-6 -> pt-4 pb-8)
- Add StudioCheckbox and SquareCheckbox backward-compat shims
- Add sync.sh rsync deploy script

resources/js/components/uploads/UploadWizard.jsx

@@ -1,6 +1,7 @@
 import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import TagInput from '../tags/TagInput'
 import ScreenshotUploader from './ScreenshotUploader'
+import Checkbox from '../../Components/ui/Checkbox'
 
 const STEP_PRELOAD = 1
 const STEP_DETAILS = 2
@@ -561,14 +562,14 @@ export default function UploadWizard({
               />
             </div>
 
-            <label className="mt-7 inline-flex items-center gap-2 text-sm text-white/80">
-              <input
-                type="checkbox"
+            <div className="mt-7">
+              <Checkbox
                 checked={details.nsfw}
                 onChange={(event) => setDetails((prev) => ({ ...prev, nsfw: event.target.checked }))}
+                size={16}
+                label="NSFW"
               />
-              NSFW
-            </label>
+            </div>
           </div>
 
           <div className="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between">