feature: a minimal implementation of staff management is done.

frontend/src/components/ui/Checkbox.tsx

@@ -0,0 +1,70 @@
+'use client';
+
+import { useId } from 'react';
+import { Check } from 'lucide-react';
+
+type CheckboxProps = {
+  checked: boolean;
+  onChange: (checked: boolean) => void;
+  disabled?: boolean;
+  label: string;
+  id?: string;
+  className?: string;
+};
+
+/**
+ * App design-system checkbox: primary fill when checked, rounded, focus-visible ring.
+ */
+export function Checkbox({
+  checked,
+  onChange,
+  disabled = false,
+  label,
+  id,
+  className = '',
+}: CheckboxProps) {
+  const genId = useId();
+  const inputId = id ?? genId;
+
+  return (
+    <label
+      htmlFor={inputId}
+      className={`
+        inline-flex items-center gap-2.5 cursor-pointer select-none rounded-[var(--radius-sm)] -m-0.5 p-0.5
+        has-[:focus-visible]:ring-2 has-[:focus-visible]:ring-primary/45 has-[:focus-visible]:ring-offset-2
+        has-[:focus-visible]:ring-offset-background-secondary
+        ${disabled ? 'opacity-50 cursor-not-allowed' : ''}
+        ${className}
+      `}
+    >
+      <input
+        id={inputId}
+        type="checkbox"
+        className="sr-only"
+        checked={checked}
+        disabled={disabled}
+        onChange={(e) => onChange(e.target.checked)}
+      />
+      <span
+        className={`
+          flex h-5 w-5 shrink-0 items-center justify-center rounded-[var(--radius-sm)] border-2 transition-all duration-200
+          shadow-[inset_0_1px_0_rgba(255,255,255,0.05)]
+          ${
+            checked
+              ? 'border-primary bg-primary shadow-[0_0_0_1px_rgba(9,169,188,0.25)]'
+              : 'border-border-strong bg-background-card/90 hover:border-border'
+          }
+        `}
+        aria-hidden
+      >
+        <Check
+          strokeWidth={3}
+          className={`h-3.5 w-3.5 text-primary-contrast transition-all duration-200 ${
+            checked ? 'scale-100 opacity-100' : 'scale-75 opacity-0'
+          }`}
+        />
+      </span>
+      <span className="text-sm text-text-secondary">{label}</span>
+    </label>
+  );
+}

frontend/src/components/ui/Sidebar.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import Link from 'next/link';
-import { memo } from 'react';
+import { memo, useMemo } from 'react';
 import { usePathname } from 'next/navigation';
 import {
   LayoutDashboard,
@@ -12,19 +12,27 @@ import {
   FileText,
   CreditCard,
 } from 'lucide-react';
+import { useAuth } from '@/lib/hooks/useAuth';
+import { canViewTab } from '@/access';
 
 const menu = [
-  { name: 'Today', path: '/today', icon: LayoutDashboard },
-  { name: 'Patients', path: '/patients', icon: Users },
-  { name: 'Appointments', path: '/appointments', icon: Calendar },
-  { name: 'Staff Management', path: '/staff', icon: UserCog },
-  { name: 'Lab Management', path: '/lab', icon: FlaskConical },
-  { name: 'Billing', path: '/billing', icon: CreditCard },
-  { name: 'Reports', path: '/reports', icon: FileText },
+  { name: 'Today', path: '/today', icon: LayoutDashboard, read: 'TAB_TODAY_READ' as const },
+  { name: 'Patients', path: '/patients', icon: Users, read: 'TAB_PATIENTS_READ' as const },
+  { name: 'Appointments', path: '/appointments', icon: Calendar, read: 'TAB_APPOINTMENTS_READ' as const },
+  { name: 'Staff Management', path: '/staff', icon: UserCog, read: 'TAB_STAFF_READ' as const },
+  { name: 'Lab Management', path: '/lab', icon: FlaskConical, read: 'TAB_LAB_READ' as const },
+  { name: 'Billing', path: '/billing', icon: CreditCard, read: 'TAB_BILLING_READ' as const },
+  { name: 'Reports', path: '/reports', icon: FileText, read: 'TAB_REPORTS_READ' as const },
 ];
 
 function Sidebar() {
   const pathname = usePathname();
+  const { currentOrganization } = useAuth();
+
+  const visibleMenu = useMemo(
+    () => menu.filter((item) => canViewTab(currentOrganization, item.read)),
+    [currentOrganization],
+  );
 
   return (
     <aside className="w-64 bg-background-secondary/90 border-r border-border text-text-primary flex flex-col">
@@ -34,7 +42,7 @@ function Sidebar() {
       <div className="mx-4 border-b border-border/70" />
 
       <nav className="flex flex-col gap-2 p-4">
-        {menu.map((item) => {
+        {visibleMenu.map((item) => {
           const Icon = item.icon;
           const isActive = pathname === item.path;