feat(ai-openrouter): capture per-request cost from chat responses#469

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season179 wants to merge 11 commits intoTanStack:mainfrom

season179:feat/openrouter-cost-tracking

Commits on Apr 18, 2026

feat(ai-openrouter): capture per-request cost from chat responses
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fix(ai-openrouter): isolate cost capture from concurrent requests and CRLF SSE
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fix(ai-openrouter): resolve no-cost takes fast and flush trailing SSE frame
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perf(ai-openrouter): skip cost capture on non-streaming chat responses
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fix(ai-openrouter): don't downgrade a completed run to RUN_ERROR on late stream abort
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fix(ai-openrouter): omit usage entirely when tokens are missing, even if cost captured
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fix(ai-openrouter): match SSE separators directly instead of per-chunk CRLF normalize
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docs(ai-openrouter): document the RUN_FINISHED deferral trade-off in code
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fix(ai-openrouter): clean up test imports to satisfy lint
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fix(ai-openrouter): match SSE content-type case-insensitively
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feat(ai): allow provider-specific numeric fields on UsageTotals.costDetails
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