Default arkor SDK to https://api.arkor.ai

[k-taro56]

Summary

• Switch the defaultArkorCloudApiUrl() fallback in the arkor SDK/CLI from http://localhost:3003 to the production endpoint https://api.arkor.ai, so a freshly-installed arkor binary talks to the managed cloud out of the box without extra configuration.
• Override behavior is preserved: setting ARKOR_CLOUD_API_URL (with or without a trailing slash) still wins, which keeps arkor dev / arkor login etc. usable against a local dev:arkor-cloud-api on :3003 or any other deployment.
• Updated the corresponding unit test to assert the new default.

Test plan

• pnpm --filter arkor test (12 files, 81 tests passing)
• Manual smoke: with ARKOR_CLOUD_API_URL unset, arkor whoami / arkor login should hit https://api.arkor.ai
• Manual smoke: with ARKOR_CLOUD_API_URL=http://localhost:3003, the same commands should hit the local dev server

[greptile-apps]

Greptile Summary

This PR updates the defaultArkorCloudApiUrl() fallback from http://localhost:3003 to https://api.arkor.ai, so out-of-the-box installs of the arkor CLI target the production cloud API. The ARKOR_CLOUD_API_URL env-var override (with trailing-slash normalisation) is fully preserved, and the corresponding unit test is updated to assert the new default.

Confidence Score: 5/5

Safe to merge — minimal, well-tested change with no logic risk.

Both changed lines are correct and symmetric: the source value and the test assertion are updated together. Override behaviour is untouched, env-var cleanup in afterEach is already in place, and the suite passes. No P0/P1 findings.

No files require special attention.

Important Files Changed

Filename	Overview
packages/arkor/src/core/credentials.ts	Single-line change: default fallback URL updated from http://localhost:3003 to https://api.arkor.ai; env-var override path unchanged.
packages/arkor/src/core/credentials.test.ts	Test description and expected value updated to match new default URL; all other tests unchanged and unaffected.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[defaultArkorCloudApiUrl called] --> B{ARKOR_CLOUD_API_URL set?}
    B -- Yes --> C[Strip trailing slash]
    C --> D[Return env-var value]
    B -- No --> E[Return 'https://api.arkor.ai']

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_{Reviews (1): Last reviewed commit: "fix: update default API URL in credentia..." | Re-trigger Greptile}

[soleil-colza]