Feature/agent leaderboard

[Glam26]

1. Branch Created: feature/agent-leaderboard
2. API Route ( app/api/agents/leaderboard/route.ts ):
   • Implemented a GET endpoint returning JSON.
   • Calculates total XP by fetching reputation-store.ts scores.
   • Uses the xp-leaderboard-store.ts event log to fetch 7-day weekly
   delta for XP.
   • Properly identifies the topBadge from their badges, and the result is
   capped at a strict 50 limit.
   • Committed the changes.
3. UI Component ( components/leaderboard-panel.tsx ):
   • Built a custom React UI leaderboard component conforming strictly to
   the requested criteria (renders top 5 agents, truncated IDs, displays
   overall XP, and + / - weekly change indicators).
   • The UI inherits styling parameters consistent with the rest of the
   application (e.g., quests-panel ).
   • Committed the changes.
4. Unit Test ( app/api/agents/leaderboard/route.test.ts ):
   • Wrote a Vitest suite to mock out 3 different agents inserting records
   into both the reputation event stores and xp-leaderboard-store .
   • Verified that total XP sorting results in the proper ranking.
   • Checked that weeklyDelta correctly parses changes inside a 7-day
   period.

closes #266

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Reliability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

Catch issues before they fail your Quality Gate with our IDE extension SonarQube for IDE