Convert admin pages to new Tailwind design pattern

- Replace 'card' class with 'admin-card' (gradient cards, dark mode support)
- Replace 'muted' class with consistent Tailwind muted states
- Standardize page headers with gradient backgrounds and Lucide icons
- Convert all inline styles to Tailwind classes
- Add admin-page CSS helpers (admin-card, admin-filter-bar, admin-section-title)
- Apply pattern to all 42 admin pages (was only 6 before)
- Zero TypeScript errors, production builds successfully

Co-authored-by: openhands <[email protected]>

src/app/admin/logs/page.tsx

@@ -1,3 +1,4 @@
+import { ScrollText } from "lucide-react";
 import { StatusCard } from "@/components/admin/dashboard";
 import { prisma } from "@/lib/prisma";
 
@@ -81,10 +82,15 @@ export default async function AdminStaffActivities({
 
   return (
     <main>
-      <h1>Staff Activities</h1>
-      <p className="muted" style={{ marginTop: "-0.4rem" }}>
-        Auditor trail of all staff actions in the hotel.
-      </p>
+      <div className="flex items-center gap-3 mb-6">
+        <div className="w-10 h-10 rounded-xl bg-gradient-to-br from-[var(--color-primary)]/20 to-[var(--color-primary)]/5 grid place-items-center">
+          <ScrollText size={20} className="text-[var(--color-primary)]" />
+        </div>
+        <div>
+          <h1 className="m-0 text-xl font-extrabold text-[var(--color-text)]">Staff Activities</h1>
+          <p className="m-0 text-xs text-[var(--color-text-muted)] mt-0.5">Auditor trail of all staff actions in the hotel.</p>
+        </div>
+      </div>
 
       <div className="grid grid-cols-[repeat(auto-fit,minmax(180px,1fr))] gap-3.5 mb-6">
         <StatusCard label="Total activities" value={total} icon="📋" />
@@ -97,27 +103,24 @@ export default async function AdminStaffActivities({
         />
       </div>
 
-      <form
-        className="card"
-        style={{ display: "flex", gap: "0.5rem", marginBottom: "1.5rem", flexWrap: "wrap" }}
-      >
+      <form className="admin-card flex gap-2 mb-6 flex-wrap">
         <input
           name="q"
           defaultValue={q}
           placeholder="Search action, description, IP..."
-          style={{ flex: 1, minWidth: 200 }}
+          className="flex-1 min-w-[200px]"
         />
         <input
           name="staffId"
           defaultValue={staffId?.toString()}
           placeholder="Staff ID"
-          style={{ width: 120 }}
+          className="w-[120px]"
         />
           <input
             name="action"
             defaultValue={action ?? ""}
             placeholder="Action type (e.g., rank_change)"
-            style={{ width: 160 }}
+            className="w-[160px]"
           />
 
         <button type="submit" className="btn btn-primary">
@@ -131,11 +134,11 @@ export default async function AdminStaffActivities({
       </form>
 
       <section className="mt-6">
-        <h2>Activities ({total})</h2>
+        <h2 className="admin-section-title">Activities ({total})</h2>
         {activities.length === 0 ? (
-          <p className="muted">No staff activities match this search.</p>
+          <div className="admin-empty">No staff activities match this search.</div>
         ) : (
-          <div style={{ overflowX: "auto" }}>
+          <div className="overflow-x-auto">
             <table>
               <thead>
                 <tr>
@@ -150,20 +153,20 @@ export default async function AdminStaffActivities({
               <tbody>
                 {activities.map((a) => (
                   <tr key={String(a.id)}>
-                    <td className="muted" style={{ whiteSpace: "nowrap" }}>{fromDate(a.createdAt)}</td>
-                    <td className="muted">#{Number(a.userId)} ({nameById.get(Number(a.userId)) ?? "unknown"})</td>
+                    <td className="text-sm text-gray-500 dark:text-gray-400 whitespace-nowrap">{fromDate(a.createdAt)}</td>
+                    <td className="text-sm text-gray-500 dark:text-gray-400 whitespace-nowrap">#{Number(a.userId)} ({nameById.get(Number(a.userId)) ?? "unknown"})</td>
                     <td>
                       <span className="inline-block text-[0.72rem] font-bold px-2 py-0.5 rounded-full bg-[var(--color-primary)]/18 text-[var(--color-text)]">{a.action}</span>
                     </td>
                     <td>{a.description}</td>
                     <td>
                       {a.targetType && a.targetId ? (
-                        <span className="muted">{a.targetType === "user" ? "User " : ""}#{String(a.targetId)}</span>
+                        <span className="text-sm text-gray-500 dark:text-gray-400">{a.targetType === "user" ? "User " : ""}#{String(a.targetId)}</span>
                       ) : (
-                        <span className="muted">—</span>
+                        <span className="text-sm text-gray-500 dark:text-gray-400">—</span>
                       )}
                     </td>
-                    <td className="muted">{a.ipAddress || "—"}</td>
+                    <td className="text-sm text-gray-500 dark:text-gray-400 whitespace-nowrap">{a.ipAddress || "—"}</td>
                   </tr>
                 ))}
               </tbody>
@@ -172,7 +175,7 @@ export default async function AdminStaffActivities({
         )}
       </section>
 
-      <p className="muted">
+      <p className="text-xs text-gray-500 dark:text-gray-400">
         Page {page} / {pages} · {total} activities
         {page < pages ? (
           <>