fix(reader): 關閉 iOS Safari text autosizing 避免 PWA 內文異常放大

[Retsomm]

iOS Safari（含 standalone PWA）的 text autosizing 機制會依欄寬/裝置寬比例 在渲染時額外放大文字，不反映在 getComputedStyle().fontSize，既有的
inline font-size 覆寫蓋不掉。epub.js 分頁排版是窄欄 CSS columns，特別 容易觸發。注入 text-size-adjust: 100% 關閉此行為。

Summary by CodeRabbit

• Bug Fixes
  • Fixed text auto-sizing behavior on iOS Safari when reading EPUB documents to ensure consistent text display across devices.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
travel-in-time	Ready	Preview	Jul 31, 2026 1:42pm

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 300b392e-1c41-423e-923d-29ee1edd3451

📥 Commits

Reviewing files that changed from the base of the PR and between cb87a63 and 891e654.

📒 Files selected for processing (2)

• pwa-next/src/components/Reader/readerStyles.ts
• pwa-next/src/hooks/reader/useReaderEngine.ts

---

📝 Walkthrough

Walkthrough

The reader adds applyTextSizeAdjustOverride and invokes it for each loaded EPUB content document. The helper sets standard and WebKit text-size adjustment to 100% on the document and its descendants.

Changes

Reader text-size adjustment override

Layer / File(s)	Summary
Apply text-size adjustment override pwa-next/src/components/Reader/readerStyles.ts, pwa-next/src/hooks/reader/useReaderEngine.ts	The reader-style helper injects standard and WebKit CSS rules. The reader engine applies the helper during EPUB document initialization.

Estimated code review effort: 2 (Simple) | ~10 minutes

Sequence Diagram(s)

sequenceDiagram
  participant useReaderEngine
  participant EPUBContentDocument
  participant applyTextSizeAdjustOverride
  useReaderEngine->>EPUBContentDocument: Initialize loaded EPUB content
  useReaderEngine->>applyTextSizeAdjustOverride: Apply override to document
  applyTextSizeAdjustOverride->>EPUBContentDocument: Inject text-size-adjust CSS

Loading

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and accurately describes disabling iOS Safari text autosizing to prevent abnormal text enlargement in the reader.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch dev

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}