fix(GRO-1793): remove unused act import and add aria-label to date inputs

QA review pointed out:
- Lint error: 'act' imported but never used in test file
- 6 test failures: date input lacked accessible label

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/__tests__/Appointments.test.tsx

@@ -1,5 +1,5 @@
 import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
-import { render, screen, fireEvent, waitFor, act } from "@testing-library/react";
+import { render, screen, fireEvent, waitFor } from "@testing-library/react";
 import { parseTimeTo24Hour, isUpcoming, CustomerNotesSection, ConfirmationSection } from "../portal/sections/Appointments.tsx";
 
 const UPCOMING_APPT = {

src/portal/sections/Appointments.tsx

@@ -664,6 +664,7 @@ export function RescheduleFlow({
               <h3 className="font-medium text-stone-800 mb-3">Pick a New Date & Time</h3>
               <input
                 type="date"
+                aria-label="Select date"
                 value={selectedDate}
                 onChange={(e) => setSelectedDate(e.target.value)}
                 min={new Date().toISOString().split('T')[0]}
@@ -1073,6 +1074,7 @@ function BookingFlow({ onClose, sessionId }: BookingFlowProps) {
                   <h3 className="font-medium text-stone-800 mb-3">Pick Date & Time</h3>
                   <input
                     type="date"
+                    aria-label="Select date"
                     value={selectedDate}
                     onChange={(e) => setSelectedDate(e.target.value)}
                     min={new Date().toISOString().split('T')[0]}