claude_code 7c308728de chore(ai-chat): add stream timing logs + env-gated aiFetch bypass (diagnostics) ...

The streaming chat turn hangs in all browsers while the non-streaming test
endpoint works — both use the same model/transport (createOpenAI + aiFetch),
so the suspect is the streaming path / custom undici RetryAgent transport.

- ai-http.ts: wrap aiFetch with per-request timing logs (start, ms-to-headers
  on success, elapsed ms + cause on failure). Chat at info, embeddings at
  debug. Only host+path logged.
- ai-chat.controller.ts / ai-chat.service.ts: log turn START, first-chunk
  latency, FINISHED duration, and elapsed ms on disconnect/error/abort.
- ai.service.ts: AI_BYPASS_RESILIENT_FETCH=true makes the CHAT model omit
  fetch:aiFetch and use the default global fetch — isolates transport vs
  request-shape. Chat-only; embeddings/STT untouched; reversible via env.
- .env.example: document the flag.

No timeout/retry change. tsc clean; ai-chat + ai suites pass (292).

2026-06-23 02:13:54 +03:00

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