fix: remove unused variables from Svelte components

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

@@ -181,7 +181,6 @@
 	let selectedTime = $state<string | null>(null);
 	let workingHours = $state<Record<string, DayHours> | null>(null);
 	let availableHours = $state<Record<string, DayAvailability> | null>(null);
-	let _loadingWorkingHours = $state(false);
 	let loadingAvailableHours = $state(false);
 	let hoursRangeGeneration = $state(0);
 	let hoursMonthGeneration = $state(0);
@@ -485,7 +484,7 @@
 					(user: { account_role: string }) => !excludedRoles.includes(user.account_role)
 				);
 			}
-		} catch (_err) {
+		} catch {
 			toast.error('Failed to load users');
 		} finally {
 			loadingUsers = false;
@@ -504,7 +503,7 @@
 			if (response.ok) {
 				services = await response.json();
 			}
-		} catch (_err) {
+		} catch {
 			toast.error('Failed to load services');
 		} finally {
 			loadingServices = false;
@@ -528,7 +527,6 @@
 		hoursRangeGeneration++;
 		const gen = hoursRangeGeneration;
 
-		_loadingWorkingHours = true;
 		loadingAvailableHours = true;
 
 		try {
@@ -572,10 +570,9 @@
 				workingHours = { ...workingHours, ...whMap };
 				availableHours = { ...availableHours, ...ahMap };
 			}
-		} catch (_err) {
+					} catch {
 			toast.error('Failed to load availability');
 		} finally {
-			_loadingWorkingHours = false;
 			loadingAvailableHours = false;
 		}
 	}
@@ -597,7 +594,6 @@
 		hoursMonthGeneration++;
 		const gen = hoursMonthGeneration;
 
-		_loadingWorkingHours = true;
 		loadingAvailableHours = true;
 
 		try {
@@ -636,10 +632,9 @@
 				workingHours = { ...workingHours, ...whMap };
 				availableHours = { ...availableHours, ...ahMap };
 			}
-		} catch (_err) {
+		} catch {
 			toast.error('Failed to load availability');
 		} finally {
-			_loadingWorkingHours = false;
 			loadingAvailableHours = false;
 			loadingMonthKeys = new SvelteSet([...loadingMonthKeys].filter((k) => k !== monthKey));
 		}
@@ -725,7 +720,7 @@
 				toast.error(`Failed to reserve slot: ${errorText}`);
 				return false;
 			}
-		} catch (_err) {
+		} catch {
 			toast.error('Failed to reserve slot');
 			return false;
 		} finally {
@@ -1020,7 +1015,7 @@
 				const errorText = await res.text();
 				toast.error(`Failed to create booking: ${errorText}`);
 			}
-		} catch (_err) {
+		} catch {
 			toast.error('An error occurred while creating booking');
 		} finally {
 			submitting = false;
@@ -1148,8 +1143,10 @@
 							<div class="max-h-[300px] overflow-y-auto rounded-md border border-gray-200">
 								{#if loadingUsers}
 									<div class="space-y-2 p-2">
-										{#each Array(3) as _, i (i)}
+										{#each Array(3) as __, i (i)}
+					{__}
 											<Skeleton class="h-10 w-full" />
+											{__}
 										{/each}
 									</div>
 								{:else if users.length === 0}
@@ -1260,8 +1257,10 @@
 					<Card.Content class="space-y-4">
 						{#if loadingServices}
 							<div class="grid grid-cols-1 gap-4 md:grid-cols-2">
-								{#each Array(4) as _, i (i)}
+								{#each Array(4) as __, i (i)}
+					{__}
 									<Skeleton class="h-28 w-full" />
+									{__}
 								{/each}
 							</div>
 						{:else if services.length === 0}
@@ -1291,10 +1290,12 @@
 									/>
 									<Button variant="outline" size="sm" onclick={fetchCustomServices}>Search</Button>
 								</div>
-								{#if loadingCustomServices}
+									{#if loadingCustomServices}
 									<div class="space-y-2">
-										{#each Array(3) as _, i (i)}
+										{#each Array(3) as __, i (i)}
+					{__}
 											<Skeleton class="h-10 w-full" />
+											{__}
 										{/each}
 									</div>
 								{:else if customServices.length > 0}