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-# TUI Flamegraph Expected Behavior
-
-This document records the expected interaction and layout behavior for the TUI
-flamegraph. It is intended as a stable reference for regressions and for tests
-under `internal/tui/flamegraph/` and `internal/tui/dashboard/`.
-
-## Interaction
-
-- `space` toggles pause. `p` does not pause the flamegraph and remains reserved
-  for the global PID picker at the top-level TUI.
-- `enter` and left-click zoom into the selected or clicked frame.
-- Clicking an ancestor frame in the zoom lineage re-roots the view to that
-  ancestor.
-- `u`, `backspace`, and `esc` undo one zoom step.
-- Direct clicks into a deep descendant create a single undo step back to the
-  previous zoom root, not an implicit stack of every skipped ancestor.
-- While paused, navigation and zoom must continue to work against the frozen
-  snapshot.
-
-## Layout
-
-- The selected frame must not render with underline or a horizontal highlight
-  line across the bar.
-- The current zoom root must span the full flamegraph width.
-- The children of the current zoom root must be normalized to the full viewport
-  width, even when the zoom root has self time or exclusive weight.
-- Zooming from any direction must produce the same full-width result for the
-  newly selected zoom root.
-- The zoom lineage rows shown above the zoomed subtree provide context, but they
-  must not steal horizontal space from the zoomed subtree.
-
-## Rendering
-
-- Rendering the dashboard view must not mutate persistent flamegraph state.
-- Redundant same-size viewport updates must be no-ops.
-- In paused mode, repeated renders must not reintroduce stale frame geometry or
-  leave artifacts from a previous layout on screen.
-
-## Regression Coverage
-
-These expectations are covered by tests in:
-
-- `internal/tui/flamegraph/renderer_test.go`
-- `internal/tui/flamegraph/model_test.go`
-- `internal/tui/flamegraph/stress_test.go`
-- `internal/tui/dashboard/model_test.go`