Implement comprehensive dark/light mode overhaul for admin panel

- Refactor color palette in `ui-design-spec.md` to utilize CSS variables exclusively, eliminating fixed hex values and Tailwind utility classes.
- Complete dark mode implementation in `uiStore.ts`, ensuring proper theme application via `applyTheme()` and `applyBrand()`.
- Create `admin-theme-dark-light-audit.md` to document the transition process, outlining issues with inline styles and fixed colors.
- Introduce `theme-tokens.test.ts` to enforce rules against fixed hex colors and ensure compliance with the design system.
- Update various components and styles to replace inline styles and fixed colors with CSS variables, ensuring consistent theming across light and dark modes.
- Ensure all changes maintain visual integrity in both light and dark modes, with a focus on accessibility and contrast standards.

assets/admin/components/PatientCaseBanner.tsx

@@ -10,15 +10,15 @@ interface Tag { uuid: string; name: string; color: string }
 /** پرونده > {name} breadcrumb, ported from tauri BreadcrumbHeader. */
 export function Breadcrumb({ name, backTo }: { name: string; backTo: string }) {
   return (
-    <div style={{ display: 'flex', alignItems: 'center', gap: 8, color: '#6B7280', fontSize: 12, marginBottom: 14 }}>
-      <Link to={backTo} className="bg-white dark:bg-[#222433]" style={{ display: 'flex', alignItems: 'center', gap: 4, padding: '6px 8px', borderRadius: 12, cursor: 'pointer', color: '#6B7280', textDecoration: 'none' }}>
+    <div style={{ display: 'flex', alignItems: 'center', gap: 8, color: 'var(--text-2)', fontSize: 12, marginBottom: 14 }}>
+      <Link to={backTo} className="bg-[var(--surface)]" style={{ display: 'flex', alignItems: 'center', gap: 4, padding: '6px 8px', borderRadius: 12, cursor: 'pointer', color: 'var(--text-2)', textDecoration: 'none' }}>
         <ArrowLeftPH />
         <span>بازگشت</span>
       </Link>
       <ArrowLeftD />
       <span>پرونده</span>
       <ArrowLeftD />
-      <span className="dark:text-[#D7D8ED]" style={{ color: '#111827' }}>{name}</span>
+      <span style={{ color: 'var(--text)' }}>{name}</span>
     </div>
   );
 }
@@ -37,8 +37,8 @@ function TagDots({ tags }: { tags?: Tag[] }) {
 const InfoLine = ({ icon, label, value }: { icon: React.ReactNode; label: string; value: string }) => (
   <div style={{ display: 'flex', alignItems: 'center', gap: 8 }}>
     {icon}
-    <span className="dark:text-[#A1A1A1]" style={{ fontSize: 12, color: '#2f2f2f' }}>{label}</span>
-    <span className="dark:text-[#D7D8ED]" style={{ fontSize: 14, fontWeight: 500, color: '#2f2f2f' }} dir="ltr">{value}</span>
+    <span style={{ fontSize: 12, color: 'var(--text)' }}>{label}</span>
+    <span style={{ fontSize: 14, fontWeight: 500, color: 'var(--text)' }} dir="ltr">{value}</span>
   </div>
 );
 
@@ -60,21 +60,21 @@ export default function PatientCaseBanner({ name, recordNumber, mobile, createdA
   const complete = !hasDebt;
   return (
     <div
-      className="bg-white dark:bg-[#222433] border border-[#EDEDED] dark:border-[#35343D]"
+      className="bg-[var(--surface)] border border-[var(--border)]"
       style={{ borderRadius: 16, padding: '14px 20px', display: 'flex', alignItems: 'center', justifyContent: 'space-between', gap: 24, marginBottom: 16, minHeight: 140, flexWrap: 'wrap' }}
     >
       {/* right — name + tags */}
       <div style={{ display: 'flex', flexDirection: 'column', gap: 12, minWidth: 0 }}>
         <div style={{ display: 'flex', alignItems: 'center', gap: 12, flexWrap: 'wrap' }}>
-          <span className="dark:text-[#D7D8ED]" style={{ fontWeight: 700, fontSize: 20, color: '#111827' }}>{name}</span>
+          <span style={{ fontWeight: 700, fontSize: 20, color: 'var(--text)' }}>{name}</span>
           <span style={{
             height: 29, minWidth: 95, borderRadius: 8, padding: '0 10px', fontSize: 13, display: 'inline-flex', alignItems: 'center', justifyContent: 'center',
-            background: complete ? '#ECFDF3' : 'rgba(255,192,81,0.15)', color: complete ? '#3C9A4F' : '#f59e0b',
+            background: complete ? 'var(--success-bg)' : 'rgba(255,192,81,0.15)', color: complete ? 'var(--success)' : 'var(--warning)',
           }}>{complete ? 'تکمیل شده' : 'تکمیل نشده'}</span>
         </div>
-        <span className="dark:text-[#D7D8ED]" style={{ fontSize: 16, color: '#525252' }}>شماره پرونده: {recordNumber || '—'}</span>
+        <span style={{ fontSize: 16, color: 'var(--text)' }}>شماره پرونده: {recordNumber || '—'}</span>
         <div style={{ display: 'flex', flexDirection: 'row', alignItems: 'center', gap: 16 }}>
-          <span className="dark:text-[#A1A1A1]" style={{ fontSize: 16, color: '#6B7280' }}>برچسب ها:</span>
+          <span style={{ fontSize: 16, color: 'var(--text-2)' }}>برچسب ها:</span>
           <TagDots tags={tags} />
         </div>
       </div>
@@ -90,7 +90,7 @@ export default function PatientCaseBanner({ name, recordNumber, mobile, createdA
         <InfoLine icon={<FilesServiceNotification />} label="نوبت بعدی:" value={nextAppointment ? formatDate(nextAppointment) : '—'} />
         <button
           type="button" onClick={onAddNote}
-          style={{ display: 'inline-flex', alignItems: 'center', gap: 6, background: '#f17732', color: '#fff', border: 'none', borderRadius: 10, padding: '0 18px', height: 36, fontSize: 13, fontWeight: 600, cursor: 'pointer' }}
+          style={{ display: 'inline-flex', alignItems: 'center', gap: 6, background: 'var(--accent)', color: 'var(--on-primary)', border: 'none', borderRadius: 10, padding: '0 18px', height: 36, fontSize: 13, fontWeight: 600, cursor: 'pointer' }}
         >
           <FilesServiceMessage /> یادداشت
         </button>