codeant-ai-for-open-source[bot] commented on PR #38677:
URL: https://github.com/apache/superset/pull/38677#issuecomment-4067461846
## **Sequence Diagram**
This PR adds PDF as a first class chart export format in dashboard and
explore actions, and introduces a new PDF NEW report format for chart
schedules. The new scheduled format generates the attachment from chart data
instead of screenshot based rendering.
```mermaid
sequenceDiagram
participant User
participant Frontend
participant Backend
participant PDFBuilder
participant ReportScheduler
participant EmailService
User->>Frontend: Click Export to PDF
Frontend->>Backend: Request chart export as pdf
Backend->>PDFBuilder: Build PDF from chart data rows
Backend-->>Frontend: Return downloadable PDF file
User->>Frontend: Select PDF NEW for chart report
Frontend->>ReportScheduler: Save schedule with PDF NEW format
ReportScheduler->>Backend: Fetch chart data export as pdf
Backend->>PDFBuilder: Build PDF from chart data rows
ReportScheduler->>EmailService: Send email with PDF attachment
```
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