style(ui): update dark mode background colors to use #090909 instead of neutral variants

src/features/admin/components/AdminTop.js

@@ -161,7 +161,7 @@ const AdminTop = ({ isMobileMenuOpen, setIsMobileMenuOpen, user, onLogout, appNa
                             leaveFrom="opacity-100 translate-y-0"
                             leaveTo="opacity-0 translate-y-1"
                         >
-                            <MenuItems className="absolute right-0 mt-4 w-48 outline-none rounded-xl border border-black/8 dark:border-white/8 bg-neutral-50 dark:bg-black shadow-lg overflow-hidden z-50">
+                            <MenuItems className="absolute right-0 mt-4 w-48 outline-none rounded-xl border border-black/8 dark:border-white/8 bg-white dark:bg-[#090909] shadow-lg overflow-hidden z-50">
                                 <div className="p-1.5 flex flex-col gap-0.5">
                                     {/* Quick links — mobile only */}
                                     {quickLinks.length > 0 && (

src/features/auth/pages/ConfirmEmailPage.client.js

@@ -98,7 +98,7 @@ export default function ConfirmEmailPage({ onSubmit, onNavigate, email, token })
   console.log('ConfirmEmailPage render', { success, error, isLoading, hasVerified });
 
   return (
-      <div className="group bg-white/80 dark:bg-neutral-900/40 backdrop-blur-sm border border-neutral-200/80 dark:border-neutral-800/50 rounded-2xl px-4 py-6 md:px-6 md:py-8 hover:bg-neutral-50/90 hover:border-neutral-300/80 dark:hover:bg-neutral-900/50 dark:hover:border-neutral-700/50 transition-all duration-300 w-full max-w-md">
+      <div className="group bg-white/80 dark:bg-[#090909] backdrop-blur-sm border border-neutral-200/80 dark:border-neutral-800/50 rounded-2xl px-4 py-6 md:px-6 md:py-8 hover:bg-neutral-50/90 hover:border-neutral-300/80 dark:hover:bg-neutral-900/50 dark:hover:border-neutral-700/50 transition-all duration-300 w-full max-w-md">
         {/* Header */}
         <div className="text-center mb-6">
           <h1 className="text-2xl font-bold text-neutral-900 dark:text-white mb-2">

src/features/auth/pages/ForgotPasswordPage.client.js

@@ -59,7 +59,7 @@ export default function ForgotPasswordPage({ onSubmit, onNavigate, currentUser =
   const inputClasses = 'w-full px-3 py-2.5 rounded-lg text-sm focus:outline-none transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed bg-white border border-neutral-300 text-neutral-900 placeholder-neutral-400 focus:border-neutral-500 focus:ring-1 focus:ring-neutral-500/20 dark:bg-neutral-900 dark:border-neutral-700/50 dark:text-white dark:placeholder-neutral-500 dark:focus:border-neutral-600 dark:focus:ring-neutral-600/20';
 
   return (
-      <div className="group bg-white/80 dark:bg-neutral-900/40 backdrop-blur-sm border border-neutral-200/80 dark:border-neutral-800/50 rounded-2xl px-4 py-6 md:px-6 md:py-8 hover:bg-neutral-50/90 hover:border-neutral-300/80 dark:hover:bg-neutral-900/50 dark:hover:border-neutral-700/50 transition-all duration-300 w-full max-w-md">
+      <div className="group bg-white/80 dark:bg-[#090909] backdrop-blur-sm border border-neutral-200/80 dark:border-neutral-800/50 rounded-2xl px-4 py-6 md:px-6 md:py-8 hover:bg-neutral-50/90 hover:border-neutral-300/80 dark:hover:bg-neutral-900/50 dark:hover:border-neutral-700/50 transition-all duration-300 w-full max-w-md">
         {/* Header */}
         <div className="text-center mb-6">
           <h1 className="text-2xl font-bold text-neutral-900 dark:text-white mb-2">

src/features/auth/pages/LoginPage.client.js

@@ -88,7 +88,7 @@ export default function LoginPage({ onSubmit, onNavigate, onSetSessionCookie, re
   const inputClasses = 'w-full px-[10px] py-[7px] rounded text-[13px] focus:outline-none transition-all duration-[120ms] ease-out disabled:opacity-50 disabled:cursor-not-allowed bg-white border border-neutral-300 text-neutral-900 placeholder-neutral-400 focus:border-neutral-500 focus:ring-1 focus:ring-neutral-500/20 dark:bg-neutral-900 dark:border-neutral-700/50 dark:text-white dark:placeholder-neutral-500 dark:focus:border-neutral-600 dark:focus:ring-neutral-600/20';
 
   return (
-      <div className="bg-white dark:bg-neutral-900/40 border border-neutral-200 dark:border-neutral-800/50 rounded-md px-4 py-6 md:px-6 md:py-8 w-full max-w-md">
+      <div className="bg-white dark:bg-[#090909] border border-neutral-200 dark:border-neutral-800/50 rounded-md px-4 py-6 md:px-6 md:py-8 w-full max-w-md">
         {/* Header */}
         <div className="text-center mb-6">
           <h1 className="text-2xl font-bold text-neutral-900 dark:text-white mb-2">

src/features/auth/pages/LogoutPage.client.js

@@ -52,7 +52,7 @@ export default function LogoutPage({ onLogout, onSetSessionCookie }) {
   };
 
   return (
-    <div className="group bg-white/80 dark:bg-neutral-900/40 backdrop-blur-sm border border-neutral-200/80 dark:border-neutral-800/50 rounded-2xl px-4 py-6 md:px-6 md:py-8 hover:bg-neutral-50/90 hover:border-neutral-300/80 dark:hover:bg-neutral-900/50 dark:hover:border-neutral-700/50 transition-all duration-300 w-full max-w-md">
+    <div className="group bg-white/80 dark:bg-[#090909] backdrop-blur-sm border border-neutral-200/80 dark:border-neutral-800/50 rounded-2xl px-4 py-6 md:px-6 md:py-8 hover:bg-neutral-50/90 hover:border-neutral-300/80 dark:hover:bg-neutral-900/50 dark:hover:border-neutral-700/50 transition-all duration-300 w-full max-w-md">
       {/* Header */}
       <div className="text-center mb-6">
         <h1 className="text-2xl font-bold text-neutral-900 dark:text-white mb-2">

src/features/auth/pages/RegisterPage.client.js

@@ -159,7 +159,7 @@ export default function RegisterPage({ onSubmit, onNavigate, currentUser = null
   const inputClasses = 'w-full px-3 py-2.5 rounded-lg text-sm focus:outline-none transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed bg-white border border-neutral-300 text-neutral-900 placeholder-neutral-400 focus:border-neutral-500 focus:ring-1 focus:ring-neutral-500/20 dark:bg-neutral-900 dark:border-neutral-700/50 dark:text-white dark:placeholder-neutral-500 dark:focus:border-neutral-600 dark:focus:ring-neutral-600/20';
 
   return (
-      <div className="bg-white/80 dark:bg-neutral-900/40 backdrop-blur-sm border border-neutral-200/80 dark:border-neutral-800/50 rounded-2xl px-4 py-6 md:px-6 md:py-8 hover:bg-neutral-50/90 hover:border-neutral-300/80 dark:hover:bg-neutral-900/50 dark:hover:border-neutral-700/50 transition-all duration-300 w-full max-w-md">
+      <div className="bg-white/80 dark:bg-[#090909] backdrop-blur-sm border border-neutral-200/80 dark:border-neutral-800/50 rounded-2xl px-4 py-6 md:px-6 md:py-8 hover:bg-neutral-50/90 hover:border-neutral-300/80 dark:hover:bg-neutral-900/50 dark:hover:border-neutral-700/50 transition-all duration-300 w-full max-w-md">
         {/* Header */}
         <div className="text-center mb-6">
           <h1 className="text-2xl font-bold text-neutral-900 dark:text-white mb-2">

src/features/auth/pages/ResetPasswordPage.client.js

@@ -111,7 +111,7 @@ export default function ResetPasswordPage({ onSubmit, onNavigate, email, token }
   const inputClasses = 'w-full px-3 py-2.5 rounded-lg text-sm focus:outline-none transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed bg-white border border-neutral-300 text-neutral-900 placeholder-neutral-400 focus:border-neutral-500 focus:ring-1 focus:ring-neutral-500/20 dark:bg-neutral-900 dark:border-neutral-700/50 dark:text-white dark:placeholder-neutral-500 dark:focus:border-neutral-600 dark:focus:ring-neutral-600/20';
 
   return (
-      <div className="group bg-white/80 dark:bg-neutral-900/40 backdrop-blur-sm border border-neutral-200/80 dark:border-neutral-800/50 rounded-2xl px-4 py-6 md:px-6 md:py-8 hover:bg-neutral-50/90 hover:border-neutral-300/80 dark:hover:bg-neutral-900/50 dark:hover:border-neutral-700/50 transition-all duration-300 w-full max-w-md">
+      <div className="group bg-white/80 dark:bg-[#090909] backdrop-blur-sm border border-neutral-200/80 dark:border-neutral-800/50 rounded-2xl px-4 py-6 md:px-6 md:py-8 hover:bg-neutral-50/90 hover:border-neutral-300/80 dark:hover:bg-neutral-900/50 dark:hover:border-neutral-700/50 transition-all duration-300 w-full max-w-md">
         {/* Header */}
         <div className="text-center mb-6">
           <h1 className="text-2xl font-bold text-neutral-900 dark:text-white mb-2">

src/shared/components/Card.js

@@ -20,10 +20,10 @@ const Card = ({
 
     const variants = {
         default: 'rounded-xl bg-white dark:bg-[#0B0B0B] border-neutral-200 dark:border-[#1B1B1B]',
-        elevated: 'rounded-xl bg-neutral-50/80 dark:bg-neutral-900/40 border-neutral-200 dark:border-neutral-800/50',
+        elevated: 'rounded-xl bg-neutral-50/80 dark:bg-[#090909] border-neutral-200 dark:border-neutral-800/50',
         outline: 'rounded-xl bg-transparent border-neutral-300 dark:border-neutral-700/50',
         solid: 'rounded-xl bg-neutral-100 dark:bg-neutral-800 border-neutral-200 dark:border-neutral-700',
-        lightDark: 'rounded-xl bg-white dark:bg-neutral-900/40 border-neutral-200 dark:border-neutral-800/50',
+        lightDark: 'rounded-xl bg-white dark:bg-[#090909] border-neutral-200 dark:border-neutral-800/50',
         success: 'rounded-xl bg-green-700/10 dark:bg-green-600/10 border-green-800/30 dark:border-green-600/20',
         info: 'rounded-xl bg-blue-700/10 dark:bg-blue-600/10 border-blue-800/30 dark:border-blue-600/20',
         warning: 'rounded-xl bg-yellow-700/10 dark:bg-yellow-600/10 border-yellow-800/30 dark:border-yellow-600/20',

src/shared/components/StatCard.js

@@ -19,7 +19,7 @@ const StatCard = ({
 
     return (
         <div
-            className={`bg-white dark:bg-neutral-900/40 border border-neutral-200 dark:border-neutral-800/50 rounded-xl px-5 py-4 flex justify-between items-start transition-all duration-[120ms] ease-out ${className}`}
+            className={`bg-white dark:bg-[#090909] border border-neutral-200 dark:border-neutral-800/50 rounded-xl px-5 py-4 flex justify-between items-start transition-all duration-[120ms] ease-out ${className}`}
             {...props}
         >
             <div className="flex-1 min-w-0">