AutomataLab v2.1.0

Added

• Undo / redo for all machine edits (Ctrl+Z / Ctrl+Y), with rapid edits coalesced into single steps.
• Light / dark theme toggle, remembered between sessions.
• Toast notifications for save / load / update and machine-type changes, replacing blocking dialogs.
• Onboarding & help — an empty-canvas hint plus a ? quick-start and keyboard-shortcut cheat sheet.
• Resizable side panel (width remembered) and resizable, draggable text-annotation boxes whose placeholder clears as you type.
• Recent files menu (desktop) for quickly reopening machines.
• Keyboard shortcut N to add a state at the viewport centre.

Changed

• Auto-layout now produces a clean, organised arrangement in a single press and re-frames the view to fit; text notes keep their place.
• Accept / reject results are unmistakable — a colour-coded status badge, highlighted final states, and a one-shot canvas flash.
• Transitions route around intermediate states instead of crossing them, and labels lift to the front on hover.
• Tab bar moved to the top; the simulation-speed input is clamped with quick presets; the history log auto-scrolls to the latest step.

Fixed

• The "AutomataLab" title no longer opens the repository in two browser tabs.
• Scrolling over a text box now scrolls the box instead of zooming the canvas.
• The right-click menu no longer runs off the bottom of the screen, and the Help dialog's close button stays pinned while scrolling.