Feat/agent reputation charts

[Devadakene]

Closes #237

Summary

Adds a radar chart and a historical trend line graph to the agent detail view to visualize multidimensional reputation data (quality, speed, reliability, cost) and historical reputation changes.

Changes

• Created ReputationDimensions, ReputationHistory, and AgentReputation types in frontend/src/types/agent.ts
• Added getAgentReputation API service in frontend/src/services/api.ts
• Created useAgentReputation hook to fetch data from GET /api/agents/:id/reputation
• Implemented AgentReputationRadar component using recharts <RadarChart>
• Implemented AgentReputationTrend component using recharts <LineChart> with brush capability for zooming
• Integrated both charts into AgentDetailModal and configured them to stack responsively
• Wrote basic rendering tests for AgentReputationRadar in AgentReputationRadar.test.tsx

Testing

• Verified charts render smoothly within AgentDetailModal.
• Confirmed the trend line graph can be zoomed into specific date ranges using the brush tool.
• Tested responsiveness of AgentDetailModal charts on smaller screens.
• Ran tests successfully using npm run test.

Related Issue

#<ISSUE_NUMBER>

Checklist

• Tests pass
• Lint is clean
• Documentation updated if needed

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[devJaja]

Well Done @Devadakene

Kindly fix the CI / frontend , also resolve the conflicts

[devJaja]

@Devadakene

Ci checks still failing