Explicit 900x500 canvas, tighter x-axis labels, unit-only y-axis title (the long vertical title collided with the tick numbers in Remanso).
Before/after bars with the target as a line series; the caption keeps the nuance the chart can't draw (true before value is ∞, not 611 s).
The tradeoff-curves doc stays the chronological data layer; the kaizen is the story layer — value model, 8-factor hypothesis table, ideas ranked by verified cause, and an evaluation left PENDING until the end-to-end on-device :sync lands.