[Bug] Incorrect behavior when in double page mode and chapter has spreads

[drcorg]

Device information

• Suwayomi-WebUI version: r1816
• Suwayomi-Server version: v1.1.1-r1566
• Server Operating System: Windows 11
• Server Desktop Environment: N/A
• Server JVM version: bundled
• Client Operating System: Windows 11
• Client Web Browser: Google Chrome 128.0.6613.113

Steps to reproduce

1. Open a manga chapter that contains a spread while in double page mode.

Expected behavior

While in double page mode, single pages preceding and succeeding spreads should be double paged unless unable to (i.e the spread is right after the first page, right before the last, or a single page is between two spreads).

Actual behavior

In chapter with spreads, the pages before or after the spread will be displayed as single paged instead of double paged.

Other details

This behavior seems to change based on whether the offset first page option is enabled. If the option is disabled, only the page before the spread will be a single, while if the option is enabled only the page after the spread will be a single. I've attached screenshots below.

Screenshots

With offset first page disabled:



With offset first page enabled:

[schroda]

unless someone else will fix it, it will be fixed with #778 (was added to the list)

[schroda]

should be fixed (83ce1ca)