Stats and overview headers: alignment in My Commitments overview

[1nonlypiece]

Description

Header and stat clusters should align to a grid so the page feels intentional.

Scope

• MyCommitmentsHeader, MyCommitmentsStats, overview chrome.
• Number formatting and optional trend chevrons.

Acceptance criteria

• Baseline grid spec and vertical rhythm between header and first content block.
• Loading and partial-data states for stats.

[DIFoundation]

Hi,

I'm a frontend engineer expert, I will like to work on this issue.