T3 Code v0.0.0-alpha.20

What's Changed

• Make chat timeline height estimates width-aware with attachment-aware tests by @juliusmarminge in #167
• Limit composer arrow-key mention jumps to adjacent mention boundaries by @juliusmarminge in #169
• Fix collapsed toast stack height and text wrapping overflow by @juliusmarminge in #171
• Render changed files as expandable tree with aggregated diff stats by @juliusmarminge in #172
• Defer release commit+tag to finalize job by @juliusmarminge in #166

Full Changelog: v0.0.0-alpha.19...v0.0.0-alpha.20