fix: Add redirect on collaboration fail

fix: Improve collaboration stability

chore: 2025

fix: New group button width

fix: Copy/pasting

fix: SDK

feat: Create new top-level group from explorer

feat: Start line in code block

fix: Diff with marks change

fix: Git sync initial group ordering

fix: Content pieces API accept ID list

chore: Version bump

fix: Element display & updates handling

fix: Divider, element inserts

fix: Center tokens loader