v5.31.0 Winter Wonderland content + fixes

API

• Content: Seasonal equipment for Winter Wonderland 2024-25 (@CuriousMagpie)
• Fix: Add handling for Winter Wonderland spanning years, when determining content availability (@SabreCat)
• Chore: Locale files updated (@weblate)

Client

• Fix: Correct a bad import of sidebar component in Seasonal Shop (@SabreCat)
• Fix: Show the quest purchase modal instead of the generic buy modal when viewing quests in Seasonal Shop (@SabreCat)
• Fix: Allow click on the entirety of the Gem element, not just the icon (@CuriousMagpie, @SabreCat)

Scripts

• Feature: Migration to adjust Gem caps and give thank-you bonuses for subscription benefit updates (@SabreCat)
• Fix: Add notifications to Harvest Feast awards (@SabreCat)