• To-dos: edit a task (pencil icon or F2), drag to reorder, and "Clear completed". Deleting an
unfinished task now asks for confirmation.
• Notes tabs: rename in place by double-clicking a tab, pressing F2 or using the menu, no more pop-up
dialogs. New tabs open straight into their name.
• The tab menu no longer runs off the screen and fits longer translations.
• Calculator in notes: percentages ("200+15%=" gives 230, "50%=" gives 0.5) and decimal commas
("2,5*3=" gives 7,5).

Theme-specific notes tabs: compact in Hacker, Chrome-style connected tabs in Light, file tabs in Dracula; Nord, Synthwave and Glass keep their panels.
Long tab names and many tabs no longer change the row height; the add button is centered.
Keyboard navigation between notes tabs (Left/Right, Home/End), visible focus and localized accessible labels.
Light theme uses a blue accent instead of green.
Fixed a race when switching notes quickly: the editor stays read-only while a note is loading, so text can no longer end up in the wrong note.

fix glass theme contrast