Increased the scale for rendering PDF pages from 0.2 to 0.5 in the
`getViewport` method to enhance resolution and sharpness. Although
CSS scales the canvas down, the higher scale ensures better visual
quality.
Enabled high-quality rendering for the canvas context by setting
`ctx.imageSmoothingEnabled` to `true` and `ctx.imageSmoothingQuality`
to `'high'`, resulting in smoother and sharper PDF content rendering.
TekH
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