chore: bulk commit of pre-existing changes

Includes:
- Admin dashboard layout and page updates
- API account auth module (routes, schemas, service)
- Dashboard sign-up form extraction, middleware refactor
- Marketplace proxy and middleware updates
- CORS origins expansion for dev environment
- Seed email domain correction (.com → .ma)
- Docs: create-account guide, fleet page, signup plan
- Various UI component and layout refinements

apps/dashboard/src/components/ui/StatCard.tsx

@@ -36,16 +36,16 @@ export default function StatCard({
   const isNegative = change !== undefined && change < 0
 
   return (
-    <div className={`card p-6 ${pulse ? 'pulse-glow' : ''}`}>
+    <div className={`card p-5 ${pulse ? 'pulse-glow' : ''}`}>
       <div className="flex items-start justify-between">
         <div className="min-w-0 flex-1">
-          <p className="text-sm font-medium text-stone-500 dark:text-stone-400">{title}</p>
+          <p className="text-[11px] font-semibold uppercase tracking-[0.14em] text-slate-500 dark:text-slate-400">{title}</p>
           <p
             className={[
-              'mt-1 text-2xl font-bold',
+              'mt-2 text-[34px] font-light leading-none tracking-normal',
               valueGradient
-                ? 'bg-gradient-to-r from-blue-600 to-orange-500 bg-clip-text text-transparent dark:from-blue-400 dark:to-orange-300'
-                : 'text-blue-950 dark:text-stone-50',
+                ? 'bg-gradient-to-br from-blue-950 via-blue-600 to-orange-500 bg-clip-text text-transparent dark:from-slate-100 dark:via-blue-200 dark:to-orange-300'
+                : 'bg-gradient-to-br from-blue-950 to-slate-700 bg-clip-text text-transparent dark:from-slate-100 dark:to-slate-300',
             ].join(' ')}
           >
             {value}
@@ -58,7 +58,7 @@ export default function StatCard({
                   style={{ width: `${Math.min(progressPercent, 100)}%` }}
                 />
               </div>
-              <span className="text-xs font-mono text-stone-500 dark:text-stone-400">
+              <span className="text-xs font-mono text-slate-500 dark:text-slate-400">
                 {Math.round(progressPercent)}%
               </span>
             </div>
@@ -68,16 +68,16 @@ export default function StatCard({
               <span
                 className={[
                   'text-xs font-medium',
-                  isPositive ? 'text-emerald-600 dark:text-emerald-300' : isNegative ? 'text-red-600 dark:text-red-300' : 'text-stone-500 dark:text-stone-400',
+                  isPositive ? 'text-emerald-600 dark:text-emerald-300' : isNegative ? 'text-red-600 dark:text-red-300' : 'text-slate-500 dark:text-slate-400',
                 ].join(' ')}
               >
                 {isPositive ? '+' : ''}{change.toFixed(1)}%
               </span>
-              <span className="text-xs text-stone-400 dark:text-stone-500">{vsLastMonthLabel}</span>
+              <span className="text-xs text-slate-500 dark:text-slate-500">{vsLastMonthLabel}</span>
             </div>
           )}
         </div>
-        <div className={`flex h-12 w-12 flex-shrink-0 items-center justify-center rounded-[1.25rem] ${iconBg}`}>
+        <div className={`flex h-10 w-10 flex-shrink-0 items-center justify-center rounded-lg ${iconBg}`}>
           <Icon className={`h-6 w-6 ${iconColor}`} />
         </div>
       </div>