Fix overlapping FXL pages in landscape orientation

[mickael-menu]

Fixed

Navigator

• #635 Fixed overlapping FXL pages in landscape orientation.

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• Fixes iPhone: Right page in spread overlaps edge of left page (epub3 FXL landscape orientation) #635

[Copilot]

Pull Request Overview

This PR fixes overlapping FXL (Fixed Layout) pages in landscape orientation by improving margin calculations and viewport handling in the EPUB navigator. The key changes center around removing asymmetric horizontal margins that caused page overlap and optimizing viewport updates to prevent unnecessary recalculations.

• Removed horizontal margin calculations that caused page overlap in landscape mode
• Added symmetrical inset handling to keep pages centered regardless of notch asymmetry
• Optimized viewport updates with early return conditions to prevent redundant calculations

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

File	Description
Sources/Navigator/EPUB/Scripts/src/fixed-page.js	Removed horizontal margin calculation and added viewport update optimization
Sources/Navigator/EPUB/EPUBFixedSpreadView.swift	Added symmetric horizontal inset handling for consistent page centering
Sources/Navigator/EPUB/Assets/Static/scripts/readium-fixed-wrapper-*.js	Updated minified JavaScript with viewport optimization changes
CHANGELOG.md	Added changelog entry documenting the fix

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