feat: refactor upload command and implement progress tracking

cmd/upload/progress_stub.go

@@ -0,0 +1,35 @@
+//go:build no_bubbletea
+
+package upload
+
+import "context"
+
+type uploadModel struct {
+}
+
+// UploadProgress manages the progress UI for uploads
+type UploadProgress struct {
+}
+
+// NewUploadProgress creates a new upload progress tracker
+func NewUploadProgress(ctx context.Context, fileName string, fileSize int64) *UploadProgress {
+	return &UploadProgress{}
+}
+
+// Start starts the progress UI in a goroutine and returns immediately
+func (up *UploadProgress) Start() {}
+
+// UpdateProgress updates the progress bar with a new percentage (0.0 - 1.0)
+func (up *UploadProgress) UpdateProgress(percent float64) {}
+
+// SetError sets an error and quits the progress UI
+func (up *UploadProgress) SetError(err error) {}
+
+// Done signals that the upload is complete
+func (up *UploadProgress) Done() {}
+
+// Wait waits for the progress UI to finish
+func (up *UploadProgress) Wait() {}
+
+// Quit quits the progress UI
+func (up *UploadProgress) Quit() {}