UI note: screenshot needs a caption

A frontend note about pairing screenshots with short searchable captions.

A screenshot is more useful when it has one caption. Not just an image. A sentence: "Save is disabled, but no missing condition is visible." or "Expected Export under Settings; current screen only shows Report actions." The caption turns the screenshot into evidence. Without it, the helper has to infer what they are supposed to notice. With it, the thread keeps both visual state and searchable text.