fix(cloud-agent-next): retry compute status connection resets

[pandemicsyn]

Summary

• Retry each read-only compute-billing status query once on the server after a 100–200 ms jittered delay when its error cause chain contains ECONNRESET.
• Leave mutations and unrelated errors unchanged, preserve the final failure, and terminate cause inspection safely for cyclic errors.
• Addresses KILOCODE-WEB-27TA, where a reset on the web-to-Worker request made compute status temporarily unavailable.

Verification

No manual runtime tests were performed: this is server-side transport recovery, verified with mocked network failures rather than production fault injection.

Visual Changes

N/A

Reviewer Notes

• Automated checks passed: all 35 client unit tests, pnpm --filter web run lint, pnpm --filter web run typecheck, changed-file formatting, and git diff --check.
• Unit tests used the checked-in Jest transforms and mappings with database setup hooks disabled for this isolated mocked client suite.
• Regression cases cover retry success, delay bounds, retry exhaustion, error identity, unrelated errors, and cyclic causes.
• Typecheck completed with Rollup external-dependency warnings.
• Independent static review completed with no actionable defects. It checked real tRPC error wrapping, authorization on both personal and organization routes, read-only Worker behavior, and test coverage.
• The retry limit is per server invocation. The existing browser React Query retry remains unchanged; persistent failure can therefore produce up to four Worker requests across two web requests. Preserving browser retry retains recovery for browser-to-web failures outside this server-side fix.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (2 files)

• apps/web/src/lib/cloud-agent-next/cloud-agent-client.ts
• apps/web/src/lib/cloud-agent-next/cloud-agent-client.test.ts

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_{Reviewed by grok-4.6 · Input: 196K · Output: 14.8K · Cached: 407.9K}

_{Review guidance: REVIEW.md from base branch main}