feat(booking): add service eligibility based on age and patch tests

- Add eligibility filtering to /api/services: exclude services below
  user's
  age, gray out services requiring patch tests that are missing/expired
- Add new endpoint /api/services/eligible-for/{user_id} for admin
  booking
  flows to check eligibility for a specific user
- Add image metadata stripping: uploads now strip all EXIF/GPS data
  via imaging library (security improvement)
- Update ServiceCard frontend: show grayed-out state for ineligible
  services with "contact us" link (public) or just warning (admin)
- Add 2 patch test services to seed data: Gel Polish Full Set,
  Luxury Gel Manicure (48h each)
- Remove deprecated local-dev.sh script

frontend/src/lib/components/admin/WalkInCreateModal.svelte

@@ -116,6 +116,13 @@
 		wasOpen = open;
 	});
 
+	// Refetch services when selected user changes (for eligibility)
+	$effect(() => {
+		if (open && selectedUserId) {
+			fetchServices();
+		}
+	});
+
 	function resetState() {
 		currentStep = 1;
 		userType = 'member';
@@ -159,7 +166,12 @@
 	async function fetchServices() {
 		loadingServices = true;
 		try {
-			const response = await fetch('/api/services', {
+			let url = '/api/services';
+			// If a user is selected, get eligibility for that user
+			if (selectedUserId) {
+				url = `/api/services/eligible-for/${selectedUserId}`;
+			}
+			const response = await fetch(url, {
 				headers: { Authorization: `Bearer ${authStore.currentToken}` }
 			});
 			if (response.ok) {
@@ -553,6 +565,7 @@
 								selected={selectedServices}
 								loading={loadingServices}
 								ontoggle={toggleService}
+								showContactLink={false}
 							/>
 						{/if}