Scroll 0.1.6: Improved Story canvas controls

Scroll 0.1.6 improves navigation and selection across Story canvas views, making trackpad, scroll-wheel, and keyboard interactions smoother and more reliable.

What changed

• Improved canvas gestures. Refined two-finger panning, continuous pinch zoom, and box selection across the whiteboard, flowchart, mind map, relationship graph, and map. Box selection is now also available in the relationship graph.
• Fixed panning failures. Fixed an issue where dragging while holding Space could stop working after selecting content on the canvas, while preserving normal Space-key behaviour in buttons and input fields.
• Fixed zoom and scrolling issues. Fixed unintended zooming of the entire app window during pinch gestures and restored scrollbar dragging in affected list views.