程序员阿江(Relakkes) 62241a31e5 fix(desktop): stop killing slow provider streams (#766)
Desktop injected a far stricter timeout stack than the terminal CLI, so
healthy-but-slow third-party providers (sensenova/bailian/zhipu) died at
exactly API_TIMEOUT_MS while the UI showed "running" forever:

- API_TIMEOUT_MS is the SDK client's time-to-first-byte budget for
  streaming requests; these gateways send zero bytes (no headers, no
  SSE ping) until prefill finishes, which takes minutes at large
  contexts. Raise the default from 120s to the SDK's own 600s and widen
  the configurable range to 30-1800s.
- Widen the desktop-forced stream watchdog idle window to 240s so
  silent thinking/prefill phases stop tripping the 90s default.
- Disable the non-streaming fallback for desktop CLI sessions: a
  non-streaming request only responds after the FULL generation, so it
  can never finish inside the same budget and loops timeout aborts
  forever while the UI spins (also avoids double tool execution,
  upstream inc-4258). All three knobs respect caller env overrides.

Repro: mock upstream whose SSE stays silent for 150s before a complete
event sequence — terminal env completes; desktop env aborts at exactly
120s (client timeout) or 90s watchdog + non-streaming fallback loop;
the fixed env completes both variants.

Tested: bun test src/server/__tests__/network-settings.test.ts src/server/__tests__/conversation-service.test.ts src/server/__tests__/proxy-network-settings.test.ts
Tested: cd desktop && bun run test -- src/stores/settingsStore.test.ts src/__tests__/generalSettings.test.tsx
Tested: cd desktop && bun run lint
Confidence: high
Scope-risk: medium
2026-06-12 17:57:33 +08:00
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