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Update trim dimensions and cover export functionality in Blurb Photo Book Editor

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ryan
2026-10-07 17:14:49 -04:00
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AGENT.md
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@@ -26,7 +26,7 @@ Maintain a Windows desktop photo-book editor that imports a photo folder, arrang
- Spine title and subtitle vertical positions are saved in inches from the bottom of the face. The title moves within the full spine; the subtitle stays in the bottom subtitle area. Resetting spine text clears custom positions and restores the centered defaults.
- **View Tagged** includes tagged photo pages and is disabled when there are no tagged photos. Page insertion and drag reordering are available in **View All** only.
- Folder import scanning, project loading, and thumbnail preparation run in background workers. Keep image decoding and preview work off the UI thread. Create or modify `QPixmap` objects only on the GUI thread; worker results should use thread-safe image data such as `QImage`. Keep progress dialogs and worker lifetime/error handling in sync.
- The default trim area is 9.5 × 8 inches per individual interior page. Final PDF dimensions and trim insets are set separately for the chosen Blurb configuration. Interior export renders at 300 PPI and verifies PDF page dimensions and page count. Configured covers export as a separate one-page full spread with editable face/spine dimensions and 0.125-inch starting values for the wrap/bleed margins; users must verify exact values for their selected Blurb configuration.
- The default trim and PDF page size is 9.625 × 8.25 inches per individual interior page, with zero trim insets. Final PDF dimensions and trim insets can be changed for the chosen Blurb configuration. Interior export renders at 300 PPI and verifies PDF page dimensions and page count. Configured covers export as a separate one-page full spread with editable face/spine dimensions, a 0.57-inch default spine, and zero wrap/bleed margins; users must verify exact values for their selected Blurb configuration.
- Do not assume trim dimensions equal final PDF dimensions. Blurb requirements vary by format and paper; consult the current official specifications when changing export guidance.
## Development