Add setting to disable automatic text selection menu

[Copilot]

This PR adds a user setting to disable the automatic text selection menu that appears when users select text in the ebook reader. This resolves conflicts with browser translation extensions that also respond to text selection events.

Problem

Users who have browser translation extensions (like Google Translate, Youdao, etc.) installed experience conflicts when selecting text in the reader. Both the reader's text selection menu and the translation extension popup would appear simultaneously, creating a poor user experience.

Solution

Added a new setting "Disable automatic text selection menu" that allows users to:

• Keep the default behavior (text selection menu appears) when the setting is disabled
• Disable the automatic popup menu when the setting is enabled, while preserving text selection functionality

Changes Made

• Settings Interface: Added disableTextSelectionMenu boolean property to the Settings interface in state.ts
• UI Component: Added checkbox control in the Settings page with proper internationalization
• Text Selection Logic: Modified TextSelectionMenu component to conditionally render based on the setting
• Localization: Added translation strings for English, Chinese (Simplified), and Japanese

Screenshots

Settings Page with New Option:

Setting Enabled (Checkbox Checked):

Behavior Comparison:

Default behavior (setting disabled) - Text selection menu appears:

With setting enabled - No popup menu appears:

Implementation Details

• The setting is persisted in localStorage using the existing settings system
• Text selection functionality continues to work normally in both modes
• The implementation follows React hooks rules and maintains proper component lifecycle
• No breaking changes to existing functionality

Testing

• ✅ Builds successfully in both development and production modes
• ✅ Passes all linting checks
• ✅ Setting persistence works correctly
• ✅ Internationalization works for all supported languages
• ✅ Text selection behavior verified for both enabled/disabled states
• ✅ No conflicts with existing text selection functionality

This change provides users with the flexibility to choose their preferred text selection experience while maintaining full backward compatibility.

Fixes #142.

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Project	Deployment	Preview	Comments	Updated (UTC)
flow-reader	Ready	Preview	Comment	Aug 18, 2025 2:02pm
flow-website	Ready	Preview	Comment	Aug 18, 2025 2:02pm