fix(admin): correct two design-system mismatches found by looking at the pages

Screenshotting the pages under dark mode and compact density (rather than
trusting that design tokens were enough) turned up two mistakes repeated across
every page this feature set added:

- `.card` carries only the surface, border and radius — padding comes from the
  separate `.card-pad`. Fifteen cards were rendering with their content flush
  against the edges.
- `.field` *is* the input box, a 40px-tall flex row. Wrapping a label plus a
  control in it produced a joined addon rather than a label above its field.
  `.field-block` is the label-above layout, and thirty-seven wrappers now use it.

Both were invisible to type-checking and to the tests, which is exactly why the
visual pass was worth running. Numbers in the new UI now go through
formatNumber so they render as Persian digits, and the utilization page's
header no longer repeats the sentence that appears under its filters verbatim.

The QA driver gained a `--ui` flag: theme and density live in
localStorage['clinicpro-ui'], so without seeding them dark mode and compact
density cannot be screenshotted at all.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

assets/admin/pages/CancellationPolicyPage.tsx

@@ -49,10 +49,10 @@ export default function CancellationPolicyPage() {
         backTo="/admin/settings-menu"
       />
 
-      <div className="card" style={{ display: 'flex', flexDirection: 'column', gap: 16, maxWidth: 640 }}>
+      <div className="card card-pad" style={{ display: 'flex', flexDirection: 'column', gap: 16, maxWidth: 640 }}>
         {loading && <span style={{ fontSize: 13, color: 'var(--text-3)' }}>در حال بارگذاری…</span>}
 
-        <div className="field" style={{ maxWidth: 220 }}>
+        <div className="field-block" style={{ maxWidth: 220 }}>
           <label htmlFor="cp-window">پنجرهٔ لغو رایگان (ساعت)</label>
           <input
             id="cp-window"
@@ -67,7 +67,7 @@ export default function CancellationPolicyPage() {
           </span>
         </div>
 
-        <div className="field" style={{ maxWidth: 260 }}>
+        <div className="field-block" style={{ maxWidth: 260 }}>
           <label>نوع جریمه پس از پنجرهٔ رایگان</label>
           <SearchableSelect
             value={mode}
@@ -77,7 +77,7 @@ export default function CancellationPolicyPage() {
         </div>
 
         {mode === 'percent' && (
-          <div className="field" style={{ maxWidth: 200 }}>
+          <div className="field-block" style={{ maxWidth: 200 }}>
             <label htmlFor="cp-percent">درصد جریمه</label>
             <input
               id="cp-percent"
@@ -95,7 +95,7 @@ export default function CancellationPolicyPage() {
         )}
 
         {mode === 'fixed' && (
-          <div className="field" style={{ maxWidth: 260 }}>
+          <div className="field-block" style={{ maxWidth: 260 }}>
             <label>مبلغ جریمه</label>
             <PriceInput value={value} onChange={setValue} suffix="ریال" />
           </div>
@@ -123,7 +123,7 @@ export default function CancellationPolicyPage() {
           اعتبار پکیج پس از لغو برمی‌گردد
         </label>
 
-        <div className="field" style={{ maxWidth: 220 }}>
+        <div className="field-block" style={{ maxWidth: 220 }}>
           <label htmlFor="cp-threshold">آستانهٔ عدم حضور</label>
           <input
             id="cp-threshold"