fix(ui): clear ability upgrade CSS when skipping turn

[FhiPunkVn]

Summary

When skipping during an ability upgrade animation, strip upgrade CSS classes so ability icons don't snap later.

Fixes #2016

Change

On skip turn click:

• clear animationUpgradeTimeOutID (already present)
• remove upgradeIcon / upgradeTransition from all ability buttons

Test plan

• Trigger ability upgrade animation, skip turn mid-animation
• On next own turn, ability icons animate/transition normally (no snap)

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Project	Deployment	Actions	Updated (UTC)
ancientbeast	Ready	Preview	Jul 10, 2026 2:22pm

[FhiPunkVn]

Closing to enforce MAX_OPEN_PRS_PER_REPO=2 on AncientBeast and reduce review noise.

Keeping highest verified XTR bounty PRs (#3184, #3189). This branch can be reopened if a maintainer prefers this fix first.

AncientBeast is now BLOCKED_FROM_AUTO_START — babysit only, no new auto PRs.