TekH a6014ae88c Improve PDF rendering quality and HiDPI support ...

Enhanced thumbnail rendering in `envelope-viewer.css` by adding `image-rendering` properties for better visual quality.

Updated `pdf-viewer.js` to support high-quality rendering with HiDPI support:
- Replaced fixed scale with dynamic scaling using `devicePixelRatio` (capped at 2x) and a base scale of 0.75.
- Adjusted canvas resolution to match scaled viewport dimensions.
- Removed inline canvas styles to delegate display size to CSS.
- Retained high-quality rendering settings for the canvas context.

These changes improve visual fidelity while maintaining performance.

2026-06-06 10:44:58 +02:00

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