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/ui/Toggle.jsx

@@ -0,0 +1,84 @@
+import React, { forwardRef } from 'react'
+
+/**
+ * Nova Toggle – on/off switch
+ *
+ * @prop {boolean}        checked   - controlled value
+ * @prop {function}       onChange  - change handler (receives event OR is called with no args if `simpleChange` true)
+ * @prop {string}         label     - text label beside the toggle
+ * @prop {string}         hint      - small helper text
+ * @prop {string}         size      - 'sm' | 'md' | 'lg'
+ * @prop {string}         variant   - 'accent' | 'emerald' | 'sky'
+ */
+const sizeMap = {
+  sm: { track: 'w-8  h-4',   thumb: 'w-3  h-3',   translate: 'translate-x-4',   offset: 'translate-x-0.5' },
+  md: { track: 'w-10 h-5',   thumb: 'w-3.5 h-3.5', translate: 'translate-x-5',  offset: 'translate-x-[3px]' },
+  lg: { track: 'w-12 h-6',   thumb: 'w-4.5 h-4.5', translate: 'translate-x-6',  offset: 'translate-x-[3px]' },
+}
+
+const variantMap = {
+  accent:  'bg-accent',
+  emerald: 'bg-emerald-500',
+  sky:     'bg-sky-500',
+}
+
+const Toggle = forwardRef(function Toggle(
+  { checked = false, onChange, label, hint, size = 'md', variant = 'accent', id, disabled = false, className = '' },
+  ref,
+) {
+  const s = sizeMap[size] ?? sizeMap.md
+  const vClass = variantMap[variant] ?? variantMap.accent
+  const inputId = id ?? (label ? `toggle-${label.toLowerCase().replace(/\s+/g, '-')}` : undefined)
+
+  return (
+    <label
+      className={[
+        'inline-flex items-start gap-3 cursor-pointer select-none',
+        disabled ? 'opacity-50 cursor-not-allowed pointer-events-none' : '',
+        className,
+      ].join(' ')}
+    >
+      {/* Hidden native checkbox for a11y */}
+      <input
+        type="checkbox"
+        id={inputId}
+        ref={ref}
+        checked={checked}
+        onChange={onChange}
+        disabled={disabled}
+        className="sr-only"
+        role="switch"
+        aria-checked={checked}
+      />
+
+      {/* Track */}
+      <span
+        className={[
+          'relative inline-flex shrink-0 rounded-full transition-colors duration-200 mt-px',
+          s.track,
+          checked ? vClass : 'bg-white/15',
+          'focus-within:ring-2 focus-within:ring-accent/50 focus-within:ring-offset-0',
+        ].join(' ')}
+        aria-hidden="true"
+      >
+        {/* Thumb */}
+        <span
+          className={[
+            'absolute top-1/2 -translate-y-1/2 rounded-full bg-white shadow transition-transform duration-200',
+            s.thumb,
+            checked ? s.translate : s.offset,
+          ].join(' ')}
+        />
+      </span>
+
+      {(label || hint) && (
+        <span className="flex flex-col gap-0.5">
+          {label && <span className="text-sm text-white/90 leading-snug">{label}</span>}
+          {hint  && <span className="text-xs text-slate-500">{hint}</span>}
+        </span>
+      )}
+    </label>
+  )
+})
+
+export default Toggle