Simulates the AdvancedMD chart notes structure: Main Page → iframe (chart notes) → iframe (data:application/pdf). Tests whether getFullDocumentWithIframes returns content from the deeply nested PDF iframe.
Main Page (this page)
└── <iframe id="chart-iframe" src="/chart-notes-content"> (same-origin)
├── Provider select, Note type, Clinical notes textarea
└── <iframe id="narrative-content" src="data:application/pdf;base64,..."> (PDF viewer)
└── Chrome's built-in PDF viewer renders the PDF contentEDITOR: IFRAME RESPONSESchart-iframe and narrative-content appear in responses