Release 4.13.4

• Fixed back button in right sidebar to hide when no parent task exists. Fixes #1590
• Corrected Turkish translations, added missing entries, and improved consistency.
• Show project title in HeaderBar once main title scrolls out of view. Fixes #1589
• Refined Sources view and removed redundant popover button for improved clarity.
• Replaced Gtk.ToggleButton with Adw.ToggleGroup for modernized view switching.
• Simplified "Expand All" and "Collapse All" into a single toggle button.
• Added "reminder" and "reminders" keywords to desktop file for easier app search.
• Quick Add now retains the last used project for faster task creation.
• Redesigned Appearance page and fixed related issues.
• Improved drag-and-drop animations in Widgets.ReorderChild and fixed last-item reorder bug.
• Fixed duplicate sync at startup by adjusting network monitor behavior.
• Fixed drag-and-drop at the end of list by adding dedicated bottom drop area. Fixes #1522
• Added font size selector for improved accessibility. Fixes #1403
• Added weekday/weekend options for recurring tasks and refactored DateTimePicker. Fixes #1671
• Added search entry to project selection dialog when moving tasks.
• Introduced a "Today" section in the Scheduled view for better planning. Fixes #1550
• Improved day change detection with periodic 5-minute checks for reliability.
• Added fly-to-target animation for priority shortcuts in QuickAdd.
• Improved handling of literal shortcut characters (@, !, p1–p4) in task titles. Fixes #1535
• Improved Control key detection to reliably trigger "Create More". Fixes #1452
• Added keyboard shortcuts help popover to task dialog.
• Introduced MarkdownProcessor class for enhanced markdown rendering in task titles. Fixes #1547 #1556
• Default label now auto-fills when creating tasks inside a label window. Fixes #1525
• Fixed attachment opening issues with improved validation and error handling. Fixes #1485
• Partial support for adaptive windows with small screen improvements.