Version 2026.07.02

• Port to Gtk 4 (#871). Note that due to changes between Gtk 3 and 4, window embedding is no longer supported (#216, #432). Also, the setting 'window-icon-document' has been removed.
• Fix issues with forking on macOS (#907)
• Fix first-page-column handling regression (#948)
• Support SIGSTOP in sandbox (#945)
• Add setting to open documents in single-page mode
• Bind toggle-single-page to w (#966)
• Make link confirmation optional
• Replace use of SHA256 with XXH3-128 for faster file hashing