Fixture-only full visual prompt for multimodal crop/OCR experiment setup.

You are reviewing sanitized textual visual evidence only. This fixture contains no screenshot, image file, image URL, private path, endpoint, crop helper, OCR helper, visual-token helper, or provider call.

Full visual evidence:
- image dimensions telemetry: width 1200, height 800
- visible area: full page region
- checkout form context: navigation button label `Continue`, validation text `Card number required`, footer notice `Sandbox order`
- missed context risk: none for this baseline because the full visual description is present
- OCR confidence telemetry: not applicable for full visual baseline
- OCR error notes: not applicable for full visual baseline

Task:
1. Identify the navigation control associated with the visible validation error.
2. State what evidence would need to remain visible if a cropped or OCR-derived variant is used.
3. State that image dimensions and visible area are telemetry only, not hosted API token or cost savings evidence.
4. State that real comparisons require provider-measured image/text token or cost fields when available, matched successful tasks, failure-rate guardrail, human corrections, and shifted-cost accounting.

This prompt is dry-run-only fixture scaffolding and does not claim hosted API savings.