- move shared parsing/grouping helpers into serverUtils and update imports
- add xcxApi singleton in serverUtils
- add Redis-backed uid score store and /api/user/nowScores endpoint
- preload uid scores in event loader and tags in profile loader
- allow grouping prediction to switch sort mode between current/yearly score
- update tags component to consume loader-provided tags
- remove unused zustand game store
- add redis test scaffold and scoreboard component scaffold
