feat(reader): immersive chrome + WeChat-Read/Mihon-style bottom sheets — tap-center toggles header/toolbar, progress & page sliders seek anywhere, WYSIWYG theme swatches, A± font size; CBZ gains 连读/整页/适高 modes, edge-tap & arrow-key paging, persisted mode (seekChapter helper + test)

docs/CHANGELOG_web.md

@@ -10,8 +10,10 @@ The format loosely follows Keep a Changelog and can be adapted to the team's hab
 
 ### Added / 新增
 
-- Text (.txt/.md) reader upgrades: paper / sepia / night reading themes and adjustable font size, with a compact prefs bar; choices persist across books (localStorage); body text is now serif with a readable measure and justified lines.
-- 文本阅读器（.txt/.md）升级：新增 纸/米/夜 三种阅读主题与字号调节，工具条常驻；偏好跨书持久化（localStorage）；正文改为衬线字体、收窄行宽并两端对齐，更利于长时间阅读。
+- Immersive reading for text & comics (微信读书/Mihon-style): tap the middle of the page to show/hide the reader header and control bar; controls now live in a slide-up bottom sheet — a progress slider jumps to any position (text) or page (CBZ), theme swatches (纸/米/夜) are WYSIWYG color dots, plus A−/A+ font size; body text is serif with a readable justified measure; all prefs persist (localStorage).
+- 文本与漫画进入沉浸阅读:点正文中央唤出/隐藏顶栏与工具条;控件收进底部滑出抽屉——进度/页码滑条直接跳到全书任意位置或任意页,主题改为所见即所得的色卡(纸/米/夜),保留 A−/A+ 字号;txt/md 正文为衬线、限宽两端对齐;偏好本地持久化。
+- CBZ adds reading modes — 连读 (continuous scroll) / 整页 (snap to page top) / 适高 (one page per screen, full width) — cycle button in the bar, choice remembered; tapping the left/right edges turns a page/screen and ←/→/PageUp/PageDown work too.
+- CBZ 新增三种阅读模式——连读 / 整页吸附 / 适高(一页一屏满宽),工具条一键循环切换并记忆;点按画面左右缘翻页(屏),并支持 ←/→/PageUp/PageDown 键。
 - PDF reader: emoji skip icons replaced with 首页/末页 text buttons, framed page canvas, and an accessible label announcing arrow-key paging.
 - PDF 阅读器：以文字按钮（首页/末页）替换 emoji 图标，页面画布加边框投影，并补充可访问的「方向键翻页」说明。