feature: a minimal implementation of staff management is done.

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';
+}