fix: 修复 ReportPreviewData 缩进和 avgAvailability 可空性

src/types/report.ts

@@ -132,34 +132,34 @@ export interface MonthlyReportPreview {
 
 // 预览页完整 metadata 结构（新格式）
 export interface ReportPreviewData {
-	// 原有字段
-	gpuCount: number
-	storageCount: number
-	totalTickets: number
-	gpuFaultCount: number
-	storageFaultCount: number
-	otherTicketCount: number
-	avgAvailability: number
-	// 新增字段
-	resolvedCount: number
-	avgDurationMinutes: number
-	ongoingCount: number
-	faultTicketCount: number
-	affectedDeviceCount: number
-	faultFreeDays: number | null  // 周报为 null
-	availabilityDetails: AvailabilityDetail[] | null  // 周报为 null
-	reportLabel: string
-	// 旧格式兼容
-	summary?: { total_tickets: number; resolved_tickets: number; avg_duration: number; sla_rate: number }
-	categories?: Array<{ fault_category: string; count: number }>
+  // 原有字段
+  gpuCount: number
+  storageCount: number
+  totalTickets: number
+  gpuFaultCount: number
+  storageFaultCount: number
+  otherTicketCount: number
+  avgAvailability: number | null  // 无工单时为 null，否则为百分比数值
+  // 新增字段
+  resolvedCount: number
+  avgDurationMinutes: number
+  ongoingCount: number
+  faultTicketCount: number
+  affectedDeviceCount: number
+  faultFreeDays: number | null  // 周报为 null
+  availabilityDetails: AvailabilityDetail[] | null  // 周报为 null
+  reportLabel: string
+  // 旧格式兼容
+  summary?: { total_tickets: number; resolved_tickets: number; avg_duration: number; sla_rate: number }
+  categories?: Array<{ fault_category: string; count: number }>
 }
 
 export interface AvailabilityDetail {
-	ip: string
-	deviceType: 'gpu' | 'storage' | 'other'
-	durationMinutes: number
-	availabilityPercent: number
-	isOngoing: boolean
+  ip: string
+  deviceType: 'gpu' | 'storage' | 'other'
+  durationMinutes: number
+  availabilityPercent: number
+  isOngoing: boolean
 }
 
 // ===== 周报类型 =====