1.12.0 — bug fixes (all devices)

Bug-fix release for every device. Finalises the 1.12.0-rc1 plugin pre-release.

Fixes

• BookFusion downloads that failed with a bare "Download failed" now say why, and a complete book is no longer rejected for being smaller than the API's advertised size (the usual cause). Failures write a detailed report to /.crosspoint/download_failure.log on the SD card; attach it when reporting a problem.
• Request headers were being dropped from every download (BookFusion Accept/Referer, plugin auth headers).
• Interrupted downloads keep a .part file and resume where the server supports HTTP Range.
• Plugins (X4 Pro / X4C): native list screens, README info screen, headless web runner, and 4096-bit RSA server certificates on plugin catalog hosts.

Also in this release

• Frontlight schedules ("night shift") on frontlight boards.
• Bookshelf home: pinned books, and the shelf fills itself from the library.

Full details in CHANGES.md.

Assets: firmware.bin (X3 / X4), x4pro_firmware.bin (X4 Pro), x4c_firmware.bin (X4C). Devices pick their own via Settings > Check for updates.