Screenshot detail of the Model Canvas bottom band on the seed demo model (modelx). The expanded validation tray sits directly above the status bar and lists one issue: a warning row with an amber triangle icon reading "Optimiser failure: No LLM config found for the aggregate creator on model ... Assign one on the project LLM screen or the model's LLM tab." Below the tray, the status bar shows the model summary badges "2 tables · 1 join · 63 dims · 19 measures · 7 aggs" on the left and the validation chip on the right rendered as an amber outlined chip reading "1 warning" with a warning icon. Above the tray the canvas itself is visible: part of the payment_transaction fact node's measures list on the left and the dim_account_type dimension node on the right. Dimensions: 1440x340px. Purpose: show the validation chip reporting a real issue and the expanded tray listing it with severity colouring.