Restored progress

internal/core/models.go

@@ -0,0 +1,25 @@
+package core
+
+import (
+	"time"
+)
+
+type File struct {
+	ID       string
+	ParentDirectory     string
+	Metadata FileMetadata
+	State    SynchronizationState
+}
+
+type FileMetadata struct {
+	Name         string
+	Size         int64
+	ModifiedTime time.Time
+	Hash         string // For comparing file content
+}
+
+type SynchronizationState struct {
+	Status    string // "pending", "in_progress", "completed", "error"
+	Progress  float64
+	LastError error
+}