[0129] 优化 PDF 阅读器缩放策略#3373
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- 用离散缩放级别列表（25% ~ 800%，共12级）替代固定10%步进 - 放大/缩小按钮跳转到列表中的上一级/下一级 - Ctrl+滚轮改为连续缩放公式 zoom *= (1 + delta/500) - 扩大缩放范围至 12% ~ 800% - 工具栏新增 +/- 按钮 - 新增快捷键：Ctrl++/Ctrl+- 放大缩小，Ctrl+0 重置100% Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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$(cat <<EOF
改动摘要
Ctrl + 滚轮从固定 ±10% 改为zoom *= (1 + delta / 500)，缩放更平滑MIN_ZOOM10% → 12%，MAX_ZOOM500% → 800%Ctrl++/Ctrl+=放大、Ctrl+-缩小、Ctrl+0重置 100%测试
xmake build qt_pdf_reader_widget_test编译通过xmake run qt_pdf_reader_widget_test10 passed, 0 failed🤖 Generated with Claude Code
EOF
)