feature: users with treatment edit permission should now have working hours defined. the appointment grid is now being drawn based on the doctor's working hours.

frontend/src/components/staff/StaffWorkingHoursStep.tsx

@@ -0,0 +1,103 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { WorkingHoursEditor } from '@/components/staff/WorkingHoursEditor';
+import {
+  blocksFromEditorDays,
+  editorDaysFromBlocks,
+  emptyWorkingHoursEditorDays,
+  validateEditorDays,
+  type WorkingHoursEditorDay,
+} from '@/components/staff/workingHours';
+
+interface StaffWorkingHoursStepProps {
+  days: WorkingHoursEditorDay[];
+  autoRepeatWeekly: boolean;
+  onDaysChange: (days: WorkingHoursEditorDay[]) => void;
+  onAutoRepeatWeeklyChange: (value: boolean) => void;
+  onValidationChange?: (error: string | null) => void;
+  disabled?: boolean;
+}
+
+export function StaffWorkingHoursStep({
+  days,
+  autoRepeatWeekly,
+  onDaysChange,
+  onAutoRepeatWeeklyChange,
+  onValidationChange,
+  disabled,
+}: StaffWorkingHoursStepProps) {
+  useEffect(() => {
+    onValidationChange?.(validateEditorDays(days));
+  }, [days, onValidationChange]);
+
+  return (
+    <div className="space-y-3">
+      <div className="rounded-[var(--radius-md)] border border-primary/25 bg-primary/5 px-3 py-3">
+        <p className="text-sm text-text-primary font-medium">Working hours recommended</p>
+        <p className="text-sm text-text-secondary mt-1">
+          Staff with treatment edit access appear as provider columns in Appointments. Set their
+          weekly hours so the schedule grid shows the right bookable times.
+        </p>
+      </div>
+      <WorkingHoursEditor
+        days={days}
+        autoRepeatWeekly={autoRepeatWeekly}
+        onDaysChange={onDaysChange}
+        onAutoRepeatWeeklyChange={onAutoRepeatWeeklyChange}
+        disabled={disabled}
+      />
+    </div>
+  );
+}
+
+export function createDefaultWorkingHoursState() {
+  return {
+    days: emptyWorkingHoursEditorDays(),
+    autoRepeatWeekly: true,
+  };
+}
+
+export function workingHoursPayloadFromState(state: {
+  days: WorkingHoursEditorDay[];
+  autoRepeatWeekly: boolean;
+}) {
+  return {
+    autoRepeatWeekly: state.autoRepeatWeekly,
+    blocks: blocksFromEditorDays(state.days),
+  };
+}
+
+export function workingHoursStateFromApi(data: {
+  autoRepeatWeekly: boolean;
+  blocks: { dayOfWeek: number; startMinute: number; endMinute: number; sortOrder?: number }[];
+}) {
+  const hasBlocks = data.blocks.length > 0;
+  return {
+    days: hasBlocks ? editorDaysFromBlocks(data.blocks) : emptyWorkingHoursEditorDays(),
+    autoRepeatWeekly: data.autoRepeatWeekly,
+  };
+}
+
+export function useWorkingHoursForm(initial?: {
+  days: WorkingHoursEditorDay[];
+  autoRepeatWeekly: boolean;
+}) {
+  const [days, setDays] = useState(initial?.days ?? emptyWorkingHoursEditorDays());
+  const [autoRepeatWeekly, setAutoRepeatWeekly] = useState(initial?.autoRepeatWeekly ?? true);
+  const [validationError, setValidationError] = useState<string | null>(null);
+
+  return {
+    days,
+    setDays,
+    autoRepeatWeekly,
+    setAutoRepeatWeekly,
+    validationError,
+    setValidationError,
+    reset(next?: { days: WorkingHoursEditorDay[]; autoRepeatWeekly: boolean }) {
+      setDays(next?.days ?? emptyWorkingHoursEditorDays());
+      setAutoRepeatWeekly(next?.autoRepeatWeekly ?? true);
+      setValidationError(null);
+    },
+  };
+}