feat(frontend): add out_of_hours booking type and timeSlots utils

Add optional out_of_hours field to Booking interface and TimeSlotGroup. Add debug logging to timeSlot generation utilities for easier development.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

frontend/src/lib/types/booking.ts

@@ -118,6 +118,7 @@ export interface Booking {
 	updated_at: string;
 	created_by?: string;
 	created_by_name?: string;
+	out_of_hours?: boolean;
 
 	// Deposit fields
 	deposit_required: boolean;

frontend/src/lib/utils/timeSlots.ts

@@ -11,6 +11,7 @@ export interface TimeSlotGroup {
 	startTime: string;
 	endTime: string;
 	isGrouped?: boolean;
+	outOfHours?: boolean;
 }
 
 export interface DayHours {
@@ -111,7 +112,16 @@ export function generateAvailableTimeSlots(
 	const dateStr = date.toString();
 	const dayWH = workingHours[dateStr];
 	const dayAH = availableHours[dateStr];
-	if (!dayWH?.isOpen || !dayAH?.slots) return [];
+	if (!dayWH?.isOpen || !dayAH?.slots) {
+		console.log('[DEBUG] generateAvailableTimeSlots - early return', {
+			dateStr,
+			hasDayWH: !!dayWH,
+			dayWH_isOpen: dayWH?.isOpen,
+			hasDayAH: !!dayAH,
+			dayAH_slots: dayAH?.slots?.length
+		});
+		return [];
+	}
 
 	const slots: string[] = [];
 	const now = new SvelteDate();
@@ -140,6 +150,16 @@ export function generateAvailableTimeSlots(
 			}
 		}
 	}
+	console.log('[DEBUG] generateAvailableTimeSlots result', {
+		dateStr,
+		duration,
+		dayWH_startTime: dayWH.startTime,
+		dayWH_endTime: dayWH.endTime,
+		dayAH_slots_raw: dayAH.slots,
+		isToday,
+		generatedSlotsCount: slots.length,
+		generatedSlots: slots.slice(0, 20) + (slots.length > 20 ? `... (${slots.length} total)` : '')
+	});
 	return slots;
 }
 
@@ -150,10 +170,25 @@ export function generateGroupedTimeSlots(
 	duration: number,
 	protection: Map<string, LunchProtectionResult>
 ): TimeSlotGroup[] {
-	if (!workingHours) return [];
+	if (!workingHours) {
+		console.log('[DEBUG] generateGroupedTimeSlots - no workingHours');
+		return [];
+	}
 	const dateStr = date.toString();
 	const dayWH = workingHours[dateStr];
-	if (!dayWH || !dayWH.isOpen) return [];
+	if (!dayWH || !dayWH.isOpen) {
+		console.log('[DEBUG] generateGroupedTimeSlots - day not open', { dateStr, dayWH });
+		return [];
+	}
+
+	console.log('[DEBUG] generateGroupedTimeSlots - inputs', {
+		dateStr,
+		duration,
+		startTime: dayWH.startTime,
+		endTime: dayWH.endTime,
+		isOpen: dayWH.isOpen,
+		source: (dayWH as any).source
+	});
 
 	const grouped: TimeSlotGroup[] = [];
 	const [startHour, startMinute] = dayWH.startTime.split(':').map(Number);
@@ -175,6 +210,15 @@ export function generateGroupedTimeSlots(
 		duration,
 		protection
 	);
+
+	console.log('[DEBUG] generateGroupedTimeSlots - availableSlots', {
+		availableSlotsCount: availableSlots.length,
+		availableSlots: availableSlots.slice(0, 30) + (availableSlots.length > 30 ? `... (${availableSlots.length} total)` : ''),
+		dayRange: `${dayWH.startTime}-${dayWH.endTime}`,
+		startTotalMinutes,
+		endTotalMinutes
+	});
+
 	let currentUnavailableStart: string | null = null;
 	let lastAvailableEndTime: string | null = null;
 
@@ -222,5 +266,12 @@ export function generateGroupedTimeSlots(
 		}
 	}
 
+	console.log('[DEBUG] generateGroupedTimeSlots - final result', {
+		availableCount: grouped.filter(s => s.type === 'available').length,
+		unavailableCount: grouped.filter(s => s.type === 'unavailable').length,
+		availableTimes: grouped.filter(s => s.type === 'available').map(s => s.startTime + '-' + s.endTime).slice(0, 20),
+		unavailableRanges: grouped.filter(s => s.type === 'unavailable').map(s => s.startTime + '-' + s.endTime)
+	});
+
 	return grouped;
 }