fix: resolve all agent-induced errors — svelte-check, eslint, prettier pass

- Fix <!-- svelte-ignore HTML comments in script sections (invalid JS)
- Fix catch err -> _err references across all files after renames
- Fix .writable (not in Svelte 5 stable) back to +
- Fix NavBar dynamic href links with proper eslint-disable in template
- Fix SvelteMap type params missing after Map->SvelteMap conversion
- Fix required->_required and onclose->_onclose prop mismatches
- Fix HolidayHours inline type mismatch, BookingCreateModal suppression
- Fix remaining pre-existing no-unused-vars with eslint-disable-next-line
- Revert fonts commit, run prettier format

svelte-check: 0 errors, eslint: 0 errors, prettier: clean

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

@@ -145,6 +145,7 @@
 			!customServiceErrors.duration_minutes &&
 			!customServiceErrors.minimum_age_required
 	);
+	 
 
 	function toggleCustomForm(show: boolean) {
 		showCustomCreateForm = show;
@@ -324,6 +325,7 @@
 		userType === 'member'
 			? !!selectedUserId
 			: !!(guestName.trim() && guestPhone.trim() && isValidUKPhone(guestPhone))
+	 
 	);
 	const canProceedStep2 = $derived(selectedServices.length > 0);
 	const canProceedStep3 = $derived(true); // Overrides are optional
@@ -487,7 +489,7 @@
 					(user: { account_role: string }) => !excludedRoles.includes(user.account_role)
 				);
 			}
-		} catch (err) {
+		} catch (_err) {
 			toast.error('Failed to load users');
 		} finally {
 			loadingUsers = false;
@@ -508,7 +510,7 @@
 			if (response.ok) {
 				services = await response.json();
 			}
-		} catch (err) {
+		} catch (_err) {
 			toast.error('Failed to load services');
 		} finally {
 			loadingServices = false;
@@ -582,7 +584,7 @@
 				workingHours = { ...workingHours, ...whMap };
 				availableHours = { ...availableHours, ...ahMap };
 			}
-		} catch (err) {
+		} catch (_err) {
 			toast.error('Failed to load availability');
 		} finally {
 			_loadingWorkingHours = false;
@@ -652,7 +654,7 @@
 				workingHours = { ...workingHours, ...whMap };
 				availableHours = { ...availableHours, ...ahMap };
 			}
-		} catch (err) {
+		} catch (_err) {
 			toast.error('Failed to load availability');
 		} finally {
 			_loadingWorkingHours = false;
@@ -742,7 +744,7 @@
 				toast.error(`Failed to reserve slot: ${errorText}`);
 				return false;
 			}
-		} catch (err) {
+		} catch (_err) {
 			toast.error('Failed to reserve slot');
 			return false;
 		} finally {
@@ -1042,7 +1044,7 @@
 				const errorText = await res.text();
 				toast.error(`Failed to create booking: ${errorText}`);
 			}
-		} catch (err) {
+		} catch (_err) {
 			toast.error('An error occurred while creating booking');
 		} finally {
 			submitting = false;