fix(cloud-agent-next): translate local backend URLs

[eshurakov]

Summary

• Keep local Cloud Agent backend URL examples as worker-reachable localhost values.
• Translate localhost backend and provider URLs to host.docker.internal only when injecting sandbox env/config.
• Preserve those worker-local defaults in dev env sync and cover the behavior with tests.

Verification

N/A - no manual verification performed; this is local dev URL/env shaping with no UI flow.

Visual Changes

N/A

Reviewer Notes

The key boundary is that worker-side local fetches still use localhost, while sandbox-injected values are rewritten for Docker container reachability.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

All changes are correct and well-scoped: the backendUrlForSandbox function is correctly implemented, the env-sync WORKER_LOCALHOST_URL_KEYS whitelist approach is sound, and both test suites cover the behaviour thoroughly.

Files Reviewed (4 files)

• services/cloud-agent-next/src/session-service.ts — New backendUrlForSandbox export: correctly swaps localhost/127.0.0.1 hostname to host.docker.internal; trailing-slash normalisation via .replace(/\/$/, '') handles the URL API's root-path / addition cleanly. Applied at both KILOCODE_BACKEND_BASE_URL/KILO_API_URL assignment and KILO_OPENROUTER_BASE → providerOptions.baseURL.
• services/cloud-agent-next/src/session-service.test.ts — Integration test verifies all three env vars are translated; backendUrlForSandbox unit tests cover localhost, 127.0.0.1, path-suffixed URL, remote URL passthrough, and non-URL passthrough.
• dev/local/env-sync/parse.ts — WORKER_LOCALHOST_URL_KEYS whitelist correctly triggers only when the example default itself contains localhost/127.0.0.1, preserving worker-reachable values during env-sync while the existing host.docker.internal and LAN-IP branches remain unchanged.
• services/cloud-agent-next/.dev.vars.example — Updated comments and default values (localhost:3000) match the new dev-time intent.

Fix these issues in Kilo Cloud

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_{Reviewed by claude-4.6-sonnet-20260217 · 1,316,156 tokens}

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

[jeanduplessis]

Reviewed final combined diff, PR body, and unresolved review-thread state. No issues found.