runtime: restore LiveTrieSource compatibility for TUI (ro)

1 files changed, 4 insertions, 0 deletions

diff --git a/internal/runtime/runtime.go b/internal/runtime/runtime.go
index 5a3c9a9..04cf6b2 100644
--- a/internal/runtime/runtime.go
+++ b/internal/runtime/runtime.go
@@ -78,10 +78,14 @@ type Configurator interface {
 	Fields() []string
 	// CountField returns the active aggregation metric name.
 	CountField() string
+	// HeightField returns the active frame-height metric (e.g. "bytes", "duration").
+	HeightField() string
 	// Reconfigure replaces the grouping fields and resets accumulated data.
 	Reconfigure([]string) error
 	// SetCountField changes the active aggregation metric and starts a fresh baseline.
 	SetCountField(string) error
+	// SetHeightField changes the frame-height metric and starts a fresh baseline.
+	SetHeightField(string) error
 	// Reset clears all accumulated data, starting a new baseline.
 	Reset()
 }