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The LiteLLM streaming requester only captured usage when a chunk had an empty `choices` list. Many OpenAI-compatible gateways (e.g. new-api) and providers send the final usage payload in a chunk that still carries an empty-delta choice, so streamed calls always recorded 0 tokens in the monitoring logs/dashboard (non-streaming worked). - Capture stream usage whenever a chunk carries it, regardless of choices - Add robust _normalize_usage (dict/obj shapes, derive missing total_tokens) - Register litellm in bootutils/deps.py (was in pyproject only) - Add MonitoringService.get_token_statistics + /monitoring/token-statistics endpoint: summary, per-model breakdown, token timeseries, and a zero-token-success data-quality signal - Add TokenMonitoring dashboard tab (summary tiles, stacked token chart, per-model table) + i18n (en/zh) - Regression tests for stream usage capture and usage normalization Verified end-to-end against a real OpenAI-compatible endpoint with gpt-5.5 and claude-opus-4-8: tokens now recorded non-zero for both streaming and non-streaming paths.