Initial WatchLink scaffold

src/app/admin/page.tsx

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+import { AppShell } from "@/components/app-shell";
+import { StatusBadge } from "@/components/status-badge";
+import { SYSTEM_PERMISSIONS } from "@/lib/access";
+import { rooms } from "@/lib/sample-data";
+
+export default function AdminPage() {
+  return (
+    <AppShell active="Admin">
+      <header className="topbar">
+        <div className="title-block">
+          <h1>Admin</h1>
+          <p>Manage roles, rooms, permissions, and users.</p>
+        </div>
+        <StatusBadge tone="good">Admin</StatusBadge>
+      </header>
+      <section className="room-layout">
+        <section className="panel">
+          <div className="panel-header">
+            <h2>Rooms</h2>
+            <button className="button primary">Create room</button>
+          </div>
+          <div className="panel-body">
+            <table className="table">
+              <thead>
+                <tr>
+                  <th>Name</th>
+                  <th>Owner</th>
+                  <th>Access</th>
+                  <th>Status</th>
+                </tr>
+              </thead>
+              <tbody>
+                {rooms.map((room) => (
+                  <tr key={room.name}>
+                    <td>{room.name}</td>
+                    <td>{room.owner}</td>
+                    <td>{room.visibility}</td>
+                    <td>{room.status}</td>
+                  </tr>
+                ))}
+              </tbody>
+            </table>
+          </div>
+        </section>
+        <section className="panel">
+          <div className="panel-header">
+            <h2>Permissions</h2>
+            <StatusBadge>Roles</StatusBadge>
+          </div>
+          <div className="panel-body">
+            {SYSTEM_PERMISSIONS.map((permission) => (
+              <div className="row" key={permission}>
+                <div className="row-title">
+                  <strong>{permission}</strong>
+                  <span>Assignable to roles</span>
+                </div>
+                <StatusBadge>Enabled</StatusBadge>
+              </div>
+            ))}
+          </div>
+        </section>
+      </section>
+    </AppShell>
+  );
+}