Add storage analytics page

internal/file/stats.go

@@ -0,0 +1,18 @@
+package file
+
+type StorageStats struct {
+	TotalFiles   int
+	ActiveFiles  int
+	DeletedFiles int
+
+	TotalBytes      int64
+	AverageFileSize int64
+
+	DiskTotalBytes int64
+	DiskFreeBytes  int64
+	DiskUsedBytes  int64
+
+	TempBytes int64
+
+	LargestFiles []FileRecord
+}