feat: wire LLM cost tracking end-to-end — backend, API, WebSocket, and CostDashboard UI#320

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nuthalapativarun wants to merge 7 commits into

microsoft:mainfrom

nuthalapativarun:feat/cost-tracking-issue-2

Commits on May 9, 2026

feat: emit LLMCallEvent from llm_call.py with CostResult token data
nuthalapativarun
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feat: accumulate LLM metrics in SessionMetricsObserver
nuthalapativarun
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feat: add MetricsService and /api/metrics router for LLM cost data
nuthalapativarun
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feat: broadcast LLMCallEvent and CostThresholdExceededEvent over WebSocket
nuthalapativarun
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feat: add LLM metrics Zustand slice and WebSocket handlers
nuthalapativarun
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feat: add CostDashboard React component with real-time LLM cost metrics
nuthalapativarun
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fix: resolve critical bugs in LLM cost tracking implementation
nuthalapativarun
committed