Planche 0.1.0-alpha.3

• Smoother card moves: stable drop animations, cleared drop targets outside columns, and no scroll jumps when focusing cards.
• Refined command palette with visible keyboard shortcuts and clearer action groups.
• Clearer move notifications with issue numbers and destination statuses; dismissible, stacked sync errors keep retry available.
• Sidebar update indicator and one-click download and installation, with unsent draft protection.
• Quieter board columns, simpler sync toolbar, consistent dialog motion, and fewer selection re-renders.
• Updated landing page and documentation with captures of the current app and accurate alpha scope.