fix(upload): allow 5 s per MB for the upload deadline

[sunnylqm]

改动

上传超时从「30 秒 + 每 MB 1 秒」放宽为「30 秒 + 每 MB 5 秒」，下限仍为 60 秒，仍是从开始上传算起的总时限，超时后照旧重试一次。

包大小	之前	之后
10 MB	60 s	80 s
50 MB	80 s	280 s
100 MB	130 s	530 s

每 MB 1 秒相当于要求持续 1 MB/s，较慢的 CI 出口或拥塞链路达不到，大包会在传输中途超时；5 秒/MB 约对应 200 KB/s。

验证

• 新增 uploadTimeoutMs 用例（下限、按 MB 向上取整、100 MB = 530 s）
• bun test：587 passed, 0 failed；bun run lint 通过

🤖 Generated with Claude Code

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Summary by CodeRabbit

• Bug Fixes
  • Increased the upload deadline allowance to 5 seconds per megabyte. The 30-second base and 60-second minimum remain unchanged.

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📝 Walkthrough

Walkthrough

The upload timeout now allows 5 seconds per megabyte instead of 1 second. The 30-second base and 60-second minimum remain unchanged. Tests cover timeout values at several upload sizes, including a partial megabyte.

Changes

Upload timeout

Layer / File(s)	Summary
Timeout calculation and tests src/api.ts, tests/api.test.ts	The per-megabyte allowance changes to 5,000 ms. Tests verify the 60,000 ms minimum, timeout scaling, and rounding up for a partial megabyte.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~5 minutes

Change: Bug fix

Merge Risk: 🔵 Low · up to ae534

Timed-out large uploads can run nearly twice the stated deadline, delaying completion. The overrun is bounded to one retry, but the absolute deadline should be enforced or explicitly accepted.

Security Architecture Review

Security architecture risk: 🔵 Low · up to ae534

Large uploads can now keep connections open substantially longer, including during the existing retry. The change does not establish a new authentication bypass or remove the existing client-side size check, but destination-side resource limits could not be verified.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The longer deadline can extend occupancy of an upload client and its selected destination connection. Available evidence does not establish that it increases an independent attacker’s authority over the service.

Trust Boundaries and Controls

• inferred — No changed client path bypasses the existing token-bearing upload API request, supplied size check, or one-retry limit. Their presence does not verify server-side authorization or resource enforcement.

Resilience and Maintainability Implications

• observed — A timed-out attempt is aborted, its file stream is destroyed on error, and only a transient error can trigger the existing single retry.

Hardening Proposals

• proposed — Verify that the upload API and selected destinations independently enforce authorization, resource budgets, and cleanup of interrupted uploads; the client’s deadline and size check should not be treated as those server-side controls.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: increasing the upload deadline allowance to 5 seconds per megabyte.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 2…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @src/api.ts:
- Line 252: Update sendUpload to establish one absolute deadline when the upload
starts, limit each attempt to the time remaining until that deadline, and skip
retries once no time remains; do not reset the full uploadTimeoutMs for each
retry.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: b1571ed6-5882-46de-9b5c-dee4ca6965bb

📥 Commits

Reviewing files that changed from the base of the PR and between 836d9fc and ae534b3.

📒 Files selected for processing (2)

• src/api.ts
• tests/api.test.ts

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