Push: Initial push

internal/model/message.go

@@ -0,0 +1,23 @@
+package model
+
+// MessageSeverity classifies the severity of a system message.
+type MessageSeverity int
+
+const (
+	// SeverityNone means no message is active.
+	SeverityNone MessageSeverity = iota
+	SeverityWarning
+	SeverityError
+	SeverityInfo
+)
+
+// SystemMessage represents an optional system-level status message.
+type SystemMessage struct {
+	Severity MessageSeverity
+	Text     string
+}
+
+// IsVisible returns true when there is an active message to display.
+func (m *SystemMessage) IsVisible() bool {
+	return m != nil && m.Severity != SeverityNone && m.Text != ""
+}