feature: a minimal implementation of staff management is done.

frontend/src/access/dashboard-tab-access.ts

@@ -0,0 +1,56 @@
+/**
+ * Dashboard route ↔ TAB_* READ permission mapping and helpers used by the shell
+ * (Sidebar, layout guard). Cross-cutting access logic lives here — not in `lib`,
+ * which remains for generic utilities (API client, hooks, etc.).
+ */
+import type { Organization } from '@/types';
+
+const ROUTE_TAB_READ: { prefix: string; permission: string }[] = [
+  { prefix: '/today', permission: 'TAB_TODAY_READ' },
+  { prefix: '/patients', permission: 'TAB_PATIENTS_READ' },
+  { prefix: '/appointments', permission: 'TAB_APPOINTMENTS_READ' },
+  { prefix: '/staff', permission: 'TAB_STAFF_READ' },
+  { prefix: '/lab', permission: 'TAB_LAB_READ' },
+  { prefix: '/billing', permission: 'TAB_BILLING_READ' },
+  { prefix: '/reports', permission: 'TAB_REPORTS_READ' },
+];
+
+export function hasPermission(org: Organization | null, permission: string): boolean {
+  if (!org) return false;
+  if (org.isOwner) return true;
+  return Boolean(org.permissions?.includes(permission));
+}
+
+/** Sidebar / route guard: READ access to a tab */
+export function canViewTab(org: Organization | null, readPermission: string): boolean {
+  return hasPermission(org, readPermission);
+}
+
+export function getRequiredReadPermissionForPath(pathname: string): string | null {
+  for (const { prefix, permission } of ROUTE_TAB_READ) {
+    if (pathname === prefix || pathname.startsWith(`${prefix}/`)) {
+      return permission;
+    }
+  }
+  return null;
+}
+
+/** First dashboard route the user may open (ordered). Fallback: account settings. */
+export function firstAccessibleDashboardPath(org: Organization | null): string {
+  if (!org) return '/today';
+  if (org.isOwner) return '/today';
+  for (const { prefix, permission } of ROUTE_TAB_READ) {
+    if (hasPermission(org, permission)) return prefix;
+  }
+  return '/settings/account';
+}
+
+export function canEditStaff(org: Organization | null): boolean {
+  return hasPermission(org, 'TAB_STAFF_EDIT');
+}
+
+export function canViewStaff(org: Organization | null): boolean {
+  return (
+    hasPermission(org, 'TAB_STAFF_READ') || hasPermission(org, 'TAB_STAFF_EDIT')
+  );
+}

frontend/src/access/index.ts

@@ -0,0 +1 @@
+export * from './dashboard-tab-access';

frontend/src/app/(dashboard)/layout.tsx

@@ -1,15 +1,21 @@
 'use client';
 
 import { memo, useEffect } from 'react';
-import { useRouter } from 'next/navigation';
+import { usePathname, useRouter } from 'next/navigation';
 import { useAuth } from '@/lib/hooks/useAuth';
 import Sidebar from '@/components/ui/Sidebar';
 import { ThemeToggle } from '@/components/ui/ThemeToggle';
 import { DashboardAccountMenu } from '@/components/ui/DashboardAccountMenu';
+import {
+  firstAccessibleDashboardPath,
+  getRequiredReadPermissionForPath,
+  hasPermission,
+} from '@/access';
 
 export default function DashboardLayout({ children }: { children: React.ReactNode }) {
   const { user, currentOrganization, isAuthReady } = useAuth();
   const router = useRouter();
+  const pathname = usePathname();
 
   // ✅ AUTH GUARD (runs once per navigation group)
   useEffect(() => {
@@ -24,7 +30,12 @@ export default function DashboardLayout({ children }: { children: React.ReactNod
       router.replace('/select-organization');
       return;
     }
-  }, [isAuthReady, user, currentOrganization, router]);
+
+    const required = getRequiredReadPermissionForPath(pathname);
+    if (required && !hasPermission(currentOrganization, required)) {
+      router.replace(firstAccessibleDashboardPath(currentOrganization));
+    }
+  }, [isAuthReady, user, currentOrganization, router, pathname]);
 
   // ✅ LOADING ONLY FOR INITIAL LOAD
   if (!isAuthReady) {

frontend/src/app/(dashboard)/patients/page.tsx

@@ -10,10 +10,10 @@ import {
   Patient,
   TreatmentHistoryItem,
 } from '@/types/patient';
-import { PatientSearchSelect } from '@/components/patients/PatientSearchSelect';
-import { CreatePatientModal } from '@/components/patients/CreatePatientModal';
-import { PatientSummaryCard } from '@/components/patients/PatientSummaryCard';
-import { TreatmentHistoryPreview } from '@/components/patients/TreatmentHistoryPreview';
+import { PatientSearchSelect } from './components/PatientSearchSelect';
+import { CreatePatientModal } from './components/CreatePatientModal';
+import { PatientSummaryCard } from './components/PatientSummaryCard';
+import { TreatmentHistoryPreview } from './components/TreatmentHistoryPreview';
 
 const EMPTY_PATIENT_FORM: CreatePatientInput = {
   firstName: '',

frontend/src/app/(dashboard)/staff/components/staffPermissions.ts

@@ -0,0 +1,43 @@
+/** Feature groups for staff invite/edit UI — matches backend seed */
+export const STAFF_FEATURE_GROUPS = [
+  { label: 'Today', read: 'TAB_TODAY_READ', edit: 'TAB_TODAY_EDIT' },
+  { label: 'Patients', read: 'TAB_PATIENTS_READ', edit: 'TAB_PATIENTS_EDIT' },
+  { label: 'Appointments', read: 'TAB_APPOINTMENTS_READ', edit: 'TAB_APPOINTMENTS_EDIT' },
+  { label: 'Staff Management', read: 'TAB_STAFF_READ', edit: 'TAB_STAFF_EDIT' },
+  { label: 'Lab Management', read: 'TAB_LAB_READ', edit: 'TAB_LAB_EDIT' },
+  { label: 'Billing', read: 'TAB_BILLING_READ', edit: 'TAB_BILLING_EDIT' },
+  { label: 'Reports', read: 'TAB_REPORTS_READ', edit: 'TAB_REPORTS_EDIT' },
+] as const;
+
+/** Map EDIT key -> { read, edit } for checkbox grid */
+export type FeaturePermState = Record<string, { read: boolean; edit: boolean }>;
+
+export function emptyFeaturePermissionState(): FeaturePermState {
+  const s: FeaturePermState = {};
+  for (const g of STAFF_FEATURE_GROUPS) {
+    s[g.edit] = { read: false, edit: false };
+  }
+  return s;
+}
+
+export function featureStateFromPermissionNames(names: string[]): FeaturePermState {
+  const set = new Set(names);
+  const s = emptyFeaturePermissionState();
+  for (const g of STAFF_FEATURE_GROUPS) {
+    const hasEdit = set.has(g.edit);
+    const hasRead = set.has(g.read) || hasEdit;
+    s[g.edit] = { read: hasRead, edit: hasEdit };
+  }
+  return s;
+}
+
+export function permissionNamesFromFeatureState(state: FeaturePermState): string[] {
+  const out: string[] = [];
+  for (const g of STAFF_FEATURE_GROUPS) {
+    const cell = state[g.edit];
+    if (!cell) continue;
+    if (cell.edit) out.push(g.edit);
+    else if (cell.read) out.push(g.read);
+  }
+  return out;
+}

frontend/src/app/(dashboard)/staff/page.tsx

@@ -1,10 +1,497 @@
-export default function StaffPage() {
+'use client';
+
+import { useCallback, useEffect, useMemo, useState } from 'react';
+import { useRouter } from 'next/navigation';
+import {
+  firstAccessibleDashboardPath,
+  canEditStaff,
+  canViewStaff,
+} from '@/access';
+import {
+  STAFF_FEATURE_GROUPS,
+  permissionNamesFromFeatureState,
+  emptyFeaturePermissionState,
+  featureStateFromPermissionNames,
+  formatAccessSummary,
+  type FeaturePermState,
+} from './staff-permission-form';
+import { UserPlus, Pencil, Trash2, Copy, Check, X } from 'lucide-react';
+import { useAuth } from '@/lib/hooks/useAuth';
+import { staffApi, type StaffMemberDto } from '@/lib/api/staff';
+import { Button } from '@/components/ui/Button';
+import { Input } from '@/components/ui/Input';
+import { Checkbox } from '@/components/ui/Checkbox';
+import { ApiError } from '@/types';
+
+function formatApiMessage(err: unknown): string {
+  if (!err || typeof err !== 'object') return 'Something went wrong';
+  const m = (err as ApiError).message;
+  if (Array.isArray(m)) return m.join(', ');
+  if (typeof m === 'string') return m;
+  return 'Something went wrong';
+}
+
+function PermissionGrid({
+  state,
+  onChange,
+  disabled,
+}: {
+  state: FeaturePermState;
+  onChange: (next: FeaturePermState) => void;
+  disabled?: boolean;
+}) {
+  const setRead = (editKey: string, read: boolean) => {
+    const cur = state[editKey] ?? { read: false, edit: false };
+    onChange({
+      ...state,
+      [editKey]: { read, edit: read ? cur.edit : false },
+    });
+  };
+
+  const setEdit = (editKey: string, edit: boolean) => {
+    const cur = state[editKey] ?? { read: false, edit: false };
+    onChange({
+      ...state,
+      [editKey]: { read: edit || cur.read, edit },
+    });
+  };
+
   return (
-    <div className="space-y-3">
-      <h1 className="text-2xl font-semibold text-text-primary">Staff Management</h1>
-      <p className="text-sm text-text-secondary">
-        Staff management module is coming soon.
-      </p>
+    <div className="grid gap-3 sm:grid-cols-2">
+      {STAFF_FEATURE_GROUPS.map((g) => {
+        const cell = state[g.edit] ?? { read: false, edit: false };
+        return (
+          <div
+            key={g.edit}
+            className="flex flex-col gap-3 rounded-[var(--radius-md)] border border-border/60 bg-background-card/50 px-3 py-3"
+          >
+            <span className="text-sm font-medium text-text-primary">{g.label}</span>
+            <div className="flex flex-col gap-2.5 pl-0.5">
+              <Checkbox
+                checked={cell.read}
+                disabled={disabled}
+                label="View"
+                onChange={(v) => setRead(g.edit, v)}
+              />
+              <Checkbox
+                checked={cell.edit}
+                disabled={disabled}
+                label="Edit"
+                onChange={(v) => setEdit(g.edit, v)}
+              />
+            </div>
+          </div>
+        );
+      })}
+    </div>
+  );
+}
+
+export default function StaffPage() {
+  const router = useRouter();
+  const { currentOrganization, user } = useAuth();
+  const [members, setMembers] = useState<StaffMemberDto[]>([]);
+  const [seats, setSeats] = useState<{
+    used: number;
+    limit: number | null;
+    unlimited: boolean;
+  } | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState('');
+  const [success, setSuccess] = useState('');
+
+  const [inviteOpen, setInviteOpen] = useState(false);
+  const [inviteEmail, setInviteEmail] = useState('');
+  const [inviteName, setInviteName] = useState('');
+  const [invitePerms, setInvitePerms] = useState(() => emptyFeaturePermissionState());
+  const [inviteLoading, setInviteLoading] = useState(false);
+  const [lastTempPassword, setLastTempPassword] = useState<string | null>(null);
+  const [copiedPw, setCopiedPw] = useState(false);
+  const [lastInviteInfo, setLastInviteInfo] = useState<{
+    name: string;
+    email: string;
+    isNewAccount: boolean;
+  } | null>(null);
+
+  const [editing, setEditing] = useState<StaffMemberDto | null>(null);
+  const [editName, setEditName] = useState('');
+  const [editPerms, setEditPerms] = useState(() => emptyFeaturePermissionState());
+  const [editLoading, setEditLoading] = useState(false);
+
+  const canEdit = useMemo(() => canEditStaff(currentOrganization), [currentOrganization]);
+  const atSeatLimit = useMemo(() => {
+    if (!seats || seats.unlimited) return false;
+    if (seats.limit == null) return false;
+    return seats.used >= seats.limit;
+  }, [seats]);
+
+  const load = useCallback(async () => {
+    setError('');
+    setLoading(true);
+    try {
+      const res = await staffApi.list();
+      setMembers(res.data.members);
+      setSeats(res.data.seats);
+    } catch (e) {
+      setError(formatApiMessage(e));
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    void load();
+  }, [load]);
+
+  useEffect(() => {
+    if (!currentOrganization) return;
+    if (!canViewStaff(currentOrganization)) {
+      router.replace(firstAccessibleDashboardPath(currentOrganization));
+    }
+  }, [currentOrganization, router]);
+
+  useEffect(() => {
+    if (!success) return;
+    const t = setTimeout(() => setSuccess(''), 4000);
+    return () => clearTimeout(t);
+  }, [success]);
+
+  async function submitInvite() {
+    setInviteLoading(true);
+    setError('');
+    setLastTempPassword(null);
+    setLastInviteInfo(null);
+    const displayName = inviteName.trim();
+    const displayEmail = inviteEmail.trim();
+    try {
+      const permissionNames = permissionNamesFromFeatureState(invitePerms);
+      const res = await staffApi.invite({
+        email: displayEmail,
+        name: displayName,
+        permissionNames,
+      });
+      const isNew = Boolean(res.data.temporaryPassword);
+      setLastTempPassword(res.data.temporaryPassword);
+      setLastInviteInfo({
+        name: displayName,
+        email: res.data.email,
+        isNewAccount: isNew,
+      });
+      setSuccess('');
+      setInviteOpen(false);
+      setInviteEmail('');
+      setInviteName('');
+      setInvitePerms(emptyFeaturePermissionState());
+      await load();
+    } catch (e) {
+      setError(formatApiMessage(e));
+    } finally {
+      setInviteLoading(false);
+    }
+  }
+
+  function openEdit(m: StaffMemberDto) {
+    if (m.isOwner) return;
+    setEditing(m);
+    setEditName(m.name);
+    setEditPerms(
+      featureStateFromPermissionNames(m.permissions ?? []),
+    );
+  }
+
+  async function submitEdit() {
+    if (!editing) return;
+    setEditLoading(true);
+    setError('');
+    try {
+      await staffApi.updateMember(editing.id, {
+        name: editName.trim(),
+        permissionNames: permissionNamesFromFeatureState(editPerms),
+      });
+      setSuccess('Member updated');
+      setEditing(null);
+      await load();
+    } catch (e) {
+      setError(formatApiMessage(e));
+    } finally {
+      setEditLoading(false);
+    }
+  }
+
+  async function removeMember(m: StaffMemberDto) {
+    if (m.isOwner) return;
+    if (m.userId === user?.id) {
+      if (!confirm('Remove yourself from this organization? You will lose access.')) return;
+    } else {
+      if (!confirm(`Remove ${m.name} from this organization?`)) return;
+    }
+    setError('');
+    try {
+      await staffApi.removeMember(m.id);
+      setSuccess('Member removed');
+      await load();
+    } catch (e) {
+      setError(formatApiMessage(e));
+    }
+  }
+
+  async function copyTempPassword() {
+    if (!lastTempPassword) return;
+    try {
+      await navigator.clipboard.writeText(lastTempPassword);
+      setCopiedPw(true);
+      setTimeout(() => setCopiedPw(false), 2000);
+    } catch {
+      setError('Could not copy to clipboard');
+    }
+  }
+
+  if (!currentOrganization || !canViewStaff(currentOrganization)) {
+    return (
+      <p className="text-sm text-text-secondary">Redirecting…</p>
+    );
+  }
+
+  return (
+    <div className="space-y-6 max-w-5xl">
+      <div className="flex flex-col gap-3 sm:flex-row sm:items-start sm:justify-between">
+        <div>
+          <h1 className="text-2xl font-semibold text-text-primary">Staff Management</h1>
+          <p className="text-sm text-text-secondary mt-1">
+            Invite teammates, set tab access, and stay within your plan seat limit.
+          </p>
+        </div>
+        {canEdit && (
+          <Button
+            size="sm"
+            onClick={() => {
+              setInviteOpen(true);
+              setLastTempPassword(null);
+              setLastInviteInfo(null);
+            }}
+            disabled={atSeatLimit}
+            className="shrink-0"
+          >
+            <UserPlus className="w-4 h-4 mr-2" />
+            Invite member
+          </Button>
+        )}
+      </div>
+
+      {seats && (
+        <p className="text-sm text-text-secondary">
+          Seats:{' '}
+          <span className="text-text-primary font-medium">
+            {seats.used}
+            {seats.unlimited ? ' (unlimited plan)' : ` / ${seats.limit}`}
+          </span>
+          {!seats.unlimited && atSeatLimit && (
+            <span className="text-amber-600 dark:text-amber-400 ml-2">
+              Limit reached — remove a member or upgrade your plan.
+            </span>
+          )}
+        </p>
+      )}
+
+      {error && (
+        <div className="rounded-[var(--radius-md)] border border-red-500/40 bg-red-500/10 px-4 py-3 text-sm text-red-700 dark:text-red-300">
+          {error}
+        </div>
+      )}
+
+      {success && (
+        <div className="rounded-[var(--radius-md)] border border-primary/30 bg-primary-soft/40 px-4 py-3 text-sm text-text-primary">
+          {success}
+        </div>
+      )}
+
+      {lastInviteInfo && (
+        <div className="relative rounded-[var(--radius-md)] border border-border-strong bg-background-secondary/90 px-4 py-3 pr-12 shadow-[inset_0_1px_0_rgba(255,255,255,0.04)] space-y-3">
+          <button
+            type="button"
+            className="absolute right-2 top-2 p-1.5 rounded-[var(--radius-sm)] text-text-muted hover:text-text-primary hover:bg-background-card/80"
+            aria-label="Dismiss"
+            onClick={() => {
+              setLastInviteInfo(null);
+              setLastTempPassword(null);
+            }}
+          >
+            <X className="w-4 h-4" />
+          </button>
+          <p className="text-sm text-text-primary pr-6">
+            {lastInviteInfo.isNewAccount ? (
+              <>
+                <span className="font-medium">{lastInviteInfo.name}</span> ({lastInviteInfo.email}) — new
+                account created and added to this organization.
+                {lastTempPassword
+                  ? ' Share the temporary password below so they can sign in.'
+                  : ''}
+              </>
+            ) : (
+              <>
+                <span className="font-medium">{lastInviteInfo.name}</span> ({lastInviteInfo.email}) — this
+                person already had an account. They can select <span className="font-medium">{currentOrganization.name}</span>{' '}
+                from the organization switcher after signing in.
+              </>
+            )}
+          </p>
+          {lastTempPassword && (
+            <div className="space-y-2 pt-1 border-t border-border/60">
+              <p className="text-xs font-medium text-text-secondary uppercase tracking-wide">
+                Temporary password (copy now — not stored)
+              </p>
+              <div className="flex flex-wrap items-center gap-2">
+                <code className="text-sm px-2 py-1.5 rounded-[var(--radius-sm)] bg-background-card border border-border font-mono">
+                  {lastTempPassword}
+                </code>
+                <Button type="button" variant="outline" size="sm" onClick={() => void copyTempPassword()}>
+                  {copiedPw ? <Check className="w-4 h-4" /> : <Copy className="w-4 h-4" />}
+                  <span className="ml-1">{copiedPw ? 'Copied' : 'Copy'}</span>
+                </Button>
+              </div>
+              <p className="text-xs text-text-muted">
+                They should sign in with this password once, then change it under account settings.
+              </p>
+            </div>
+          )}
+        </div>
+      )}
+
+      {loading ? (
+        <p className="text-sm text-text-secondary">Loading team…</p>
+      ) : (
+        <div className="overflow-x-auto rounded-[var(--radius-md)] border border-border/70">
+          <table className="w-full text-sm">
+            <thead>
+              <tr className="border-b border-border/70 text-left text-text-secondary">
+                <th className="p-3 font-medium">Name</th>
+                <th className="p-3 font-medium">Email</th>
+                <th className="p-3 font-medium">Role</th>
+                <th className="p-3 font-medium">Access</th>
+                {canEdit && <th className="p-3 font-medium w-28">Actions</th>}
+              </tr>
+            </thead>
+            <tbody>
+              {members.map((m) => (
+                <tr key={m.id} className="border-b border-border/40 last:border-0">
+                  <td className="p-3 text-text-primary">{m.name}</td>
+                  <td className="p-3 text-text-secondary">{m.email}</td>
+                  <td className="p-3">
+                    {m.isOwner ? (
+                      <span className="text-primary font-medium">Owner</span>
+                    ) : (
+                      <span className="text-text-secondary">Staff</span>
+                    )}
+                  </td>
+                  <td className="p-3 text-text-secondary max-w-md">
+                    {m.isOwner ? (
+                      <span className="text-text-muted">All features</span>
+                    ) : (
+                      <span className="line-clamp-3 text-sm leading-relaxed">
+                        {formatAccessSummary(m.permissions)}
+                      </span>
+                    )}
+                  </td>
+                  {canEdit && (
+                    <td className="p-3">
+                      {!m.isOwner && (
+                        <div className="flex items-center gap-1">
+                          <button
+                            type="button"
+                            className="p-2 rounded-md text-text-secondary hover:bg-background-card/80 hover:text-text-primary"
+                            aria-label="Edit member"
+                            onClick={() => openEdit(m)}
+                          >
+                            <Pencil className="w-4 h-4" />
+                          </button>
+                          <button
+                            type="button"
+                            className="p-2 rounded-md text-text-secondary hover:bg-red-500/15 hover:text-red-600"
+                            aria-label="Remove member"
+                            onClick={() => void removeMember(m)}
+                          >
+                            <Trash2 className="w-4 h-4" />
+                          </button>
+                        </div>
+                      )}
+                    </td>
+                  )}
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      )}
+
+      {inviteOpen && (
+        <div className="fixed inset-0 z-50 flex items-center justify-center p-4 bg-black/50">
+          <div
+            className="w-full max-w-lg max-h-[90vh] overflow-y-auto rounded-[var(--radius-md)] border border-border bg-background-secondary p-6 shadow-xl space-y-4"
+            role="dialog"
+            aria-modal="true"
+            aria-labelledby="invite-staff-title"
+          >
+            <h2 id="invite-staff-title" className="text-lg font-semibold text-text-primary">
+              Invite team member
+            </h2>
+            <Input
+              label="Email"
+              type="email"
+              value={inviteEmail}
+              onChange={(e) => setInviteEmail(e.target.value)}
+              autoComplete="off"
+            />
+            <Input
+              label="Display name"
+              value={inviteName}
+              onChange={(e) => setInviteName(e.target.value)}
+            />
+            <div>
+              <p className="text-sm font-medium text-text-secondary mb-2">Tab access</p>
+              <PermissionGrid state={invitePerms} onChange={setInvitePerms} />
+            </div>
+            <div className="flex justify-end gap-2 pt-2">
+              <Button variant="outline" type="button" onClick={() => setInviteOpen(false)}>
+                Cancel
+              </Button>
+              <Button
+                type="button"
+                isLoading={inviteLoading}
+                disabled={!inviteEmail.trim() || !inviteName.trim()}
+                onClick={() => void submitInvite()}
+              >
+                Send invite
+              </Button>
+            </div>
+          </div>
+        </div>
+      )}
+
+      {editing && (
+        <div className="fixed inset-0 z-50 flex items-center justify-center p-4 bg-black/50">
+          <div
+            className="w-full max-w-lg max-h-[90vh] overflow-y-auto rounded-[var(--radius-md)] border border-border bg-background-secondary p-6 shadow-xl space-y-4"
+            role="dialog"
+            aria-modal="true"
+          >
+            <h2 className="text-lg font-semibold text-text-primary">Edit member</h2>
+            <p className="text-xs text-text-muted">{editing.email}</p>
+            <Input label="Display name" value={editName} onChange={(e) => setEditName(e.target.value)} />
+            <div>
+              <p className="text-sm font-medium text-text-secondary mb-2">Tab access</p>
+              <PermissionGrid state={editPerms} onChange={setEditPerms} />
+            </div>
+            <div className="flex justify-end gap-2 pt-2">
+              <Button variant="outline" type="button" onClick={() => setEditing(null)}>
+                Cancel
+              </Button>
+              <Button type="button" isLoading={editLoading} onClick={() => void submitEdit()}>
+                Save
+              </Button>
+            </div>
+          </div>
+        </div>
+      )}
     </div>
   );
 }

frontend/src/app/(dashboard)/staff/staff-permission-form.ts

@@ -0,0 +1,60 @@
+/**
+ * Staff route only: tab matrix + checkbox state ↔ TAB_* permission names.
+ * Add presentational pieces under ./components/ as the UI grows.
+ */
+
+export const STAFF_FEATURE_GROUPS = [
+  { label: 'Today', read: 'TAB_TODAY_READ', edit: 'TAB_TODAY_EDIT' },
+  { label: 'Patients', read: 'TAB_PATIENTS_READ', edit: 'TAB_PATIENTS_EDIT' },
+  { label: 'Appointments', read: 'TAB_APPOINTMENTS_READ', edit: 'TAB_APPOINTMENTS_EDIT' },
+  { label: 'Staff Management', read: 'TAB_STAFF_READ', edit: 'TAB_STAFF_EDIT' },
+  { label: 'Lab Management', read: 'TAB_LAB_READ', edit: 'TAB_LAB_EDIT' },
+  { label: 'Billing', read: 'TAB_BILLING_READ', edit: 'TAB_BILLING_EDIT' },
+  { label: 'Reports', read: 'TAB_REPORTS_READ', edit: 'TAB_REPORTS_EDIT' },
+] as const;
+
+export type FeaturePermState = Record<string, { read: boolean; edit: boolean }>;
+
+export function emptyFeaturePermissionState(): FeaturePermState {
+  const s: FeaturePermState = {};
+  for (const g of STAFF_FEATURE_GROUPS) {
+    s[g.edit] = { read: false, edit: false };
+  }
+  return s;
+}
+
+export function featureStateFromPermissionNames(names: string[]): FeaturePermState {
+  const set = new Set(names);
+  const s = emptyFeaturePermissionState();
+  for (const g of STAFF_FEATURE_GROUPS) {
+    const hasEdit = set.has(g.edit);
+    const hasRead = set.has(g.read) || hasEdit;
+    s[g.edit] = { read: hasRead, edit: hasEdit };
+  }
+  return s;
+}
+
+export function permissionNamesFromFeatureState(state: FeaturePermState): string[] {
+  const out: string[] = [];
+  for (const g of STAFF_FEATURE_GROUPS) {
+    const cell = state[g.edit];
+    if (!cell) continue;
+    if (cell.edit) out.push(g.edit);
+    else if (cell.read) out.push(g.read);
+  }
+  return out;
+}
+
+/** Human-readable access for the team table — feature name, or "Feature (Read only)" */
+export function formatAccessSummary(permissionNames: string[] | null | undefined): string {
+  if (!permissionNames?.length) return 'No tab access';
+  const set = new Set(permissionNames);
+  const parts: string[] = [];
+  for (const g of STAFF_FEATURE_GROUPS) {
+    const hasEdit = set.has(g.edit);
+    const hasRead = set.has(g.read) || hasEdit;
+    if (!hasRead) continue;
+    parts.push(hasEdit ? g.label : `${g.label} (Read only)`);
+  }
+  return parts.length ? parts.join(' · ') : 'No tab access';
+}

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;
 

frontend/src/lib/api/staff.ts

@@ -0,0 +1,63 @@
+import { apiClient } from './client';
+
+export interface StaffMemberDto {
+  id: string;
+  userId: string;
+  email: string;
+  name: string;
+  isOwner: boolean;
+  permissions: string[] | null;
+}
+
+export interface StaffListResponse {
+  success: boolean;
+  data: {
+    members: StaffMemberDto[];
+    seats: {
+      used: number;
+      limit: number | null;
+      unlimited: boolean;
+    };
+  };
+}
+
+export interface InviteStaffResponse {
+  success: boolean;
+  data: {
+    membershipId: string;
+    userId: string;
+    email: string;
+    temporaryPassword: string | null;
+  };
+}
+
+export const staffApi = {
+  list: async (): Promise<StaffListResponse> => {
+    const response = await apiClient.get('/staff');
+    return response.data;
+  },
+
+  invite: async (body: {
+    email: string;
+    name: string;
+    permissionNames: string[];
+  }): Promise<InviteStaffResponse> => {
+    const response = await apiClient.post('/staff/invite', body);
+    return response.data;
+  },
+
+  updateMember: async (
+    membershipId: string,
+    body: { name?: string; permissionNames?: string[] },
+  ): Promise<{ success: boolean; message: string }> => {
+    const response = await apiClient.patch(`/staff/members/${membershipId}`, body);
+    return response.data;
+  },
+
+  removeMember: async (
+    membershipId: string,
+  ): Promise<{ success: boolean; message: string }> => {
+    const response = await apiClient.delete(`/staff/members/${membershipId}`);
+    return response.data;
+  },
+};

frontend/src/lib/hooks/useAuth.tsx

@@ -223,6 +223,7 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
         name: organization.name,
         type: organization.type as Organization['type'],
         isOwner: Boolean((organization as { isOwner?: boolean }).isOwner),
+        permissions: (organization as { permissions?: string[] }).permissions,
         plan: (organization as { plan?: Organization['plan'] }).plan,
       });
 

frontend/src/shared/permissions.ts

@@ -0,0 +1,51 @@
+import type { Organization } from '@/types';
+
+const ROUTE_TAB_READ: { prefix: string; permission: string }[] = [
+  { prefix: '/today', permission: 'TAB_TODAY_READ' },
+  { prefix: '/patients', permission: 'TAB_PATIENTS_READ' },
+  { prefix: '/appointments', permission: 'TAB_APPOINTMENTS_READ' },
+  { prefix: '/staff', permission: 'TAB_STAFF_READ' },
+  { prefix: '/lab', permission: 'TAB_LAB_READ' },
+  { prefix: '/billing', permission: 'TAB_BILLING_READ' },
+  { prefix: '/reports', permission: 'TAB_REPORTS_READ' },
+];
+
+export function hasPermission(org: Organization | null, permission: string): boolean {
+  if (!org) return false;
+  if (org.isOwner) return true;
+  return Boolean(org.permissions?.includes(permission));
+}
+
+/** Sidebar / route guard: READ access to a tab */
+export function canViewTab(org: Organization | null, readPermission: string): boolean {
+  return hasPermission(org, readPermission);
+}
+
+export function getRequiredReadPermissionForPath(pathname: string): string | null {
+  for (const { prefix, permission } of ROUTE_TAB_READ) {
+    if (pathname === prefix || pathname.startsWith(`${prefix}/`)) {
+      return permission;
+    }
+  }
+  return null;
+}
+
+/** First dashboard route the user may open (ordered). Fallback: account settings. */
+export function firstAccessibleDashboardPath(org: Organization | null): string {
+  if (!org) return '/today';
+  if (org.isOwner) return '/today';
+  for (const { prefix, permission } of ROUTE_TAB_READ) {
+    if (hasPermission(org, permission)) return prefix;
+  }
+  return '/settings/account';
+}
+
+export function canEditStaff(org: Organization | null): boolean {
+  return hasPermission(org, 'TAB_STAFF_EDIT');
+}
+
+export function canViewStaff(org: Organization | null): boolean {
+  return (
+    hasPermission(org, 'TAB_STAFF_READ') || hasPermission(org, 'TAB_STAFF_EDIT')
+  );
+}