docs: Update self-hosted worker API key setup

[warp-agent-staging]

Summary

Updates the managed self-hosted worker documentation to use the dedicated team-scoped API key flow shown in the product. The API key reference is now the canonical creation procedure, and each managed backend links to it instead of directing users to bind an Agent key.

Changes

• Documented the Self-hosted worker key type and one-time copy flow in the API key reference.
• Updated the Docker, Kubernetes, and Direct setup pages, quickstart, worker reference, and troubleshooting guidance.
• Preserved published heading anchors and trimmed the quickstart to its compression budget.

Verification

• npm run build — passed.
• python3 .agents/skills/check_for_broken_links/check_links.py --internal-only — passed; 0 broken internal links.
• python3 .agents/skills/doc_quality_policy/check_compression_contract.py src/content/docs/platform/self-hosting/quickstart.mdx --content-type quickstart — passed.
• python3 .agents/skills/style_lint/style_lint.py --changed — completed with 6 pre-existing warnings in touched files and no newly introduced warnings.
• Full external-link validation completed with 2 unrelated pre-existing 404s in src/content/docs/changelog/2026.mdx.
• trunk check — unavailable because Trunk is not installed in this environment.

Unverified claims

None — all UI labels, key scope, expiration behavior, and one-time display behavior were verified against the Loom demonstration and warp-server source.

Documentation risk

Risk: engineering-review-required
Rationale: Updates self-hosted worker authentication behavior and user-interface labels.
Source files consulted: warp-server/client/packages/factory/src/pages/UserSettings/NewApiKeyModal.tsx@50a3365d2c685bd0f3014ddf296e185222740321, warp-server/client/packages/factory/src/pages/UserSettings/index.tsx@50a3365d2c685bd0f3014ddf296e185222740321
Engineering review status: pending
Docs override: none

Additional context

• Requested Loom demonstration
• Source-owner resolution found no single owner, so no engineering reviewer is requested.

Co-Authored-By: Oz oz-agent@warp.dev

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Project	Deployment	Actions	Updated
docs	Ready	Preview	Sep 25, 2026 11:37pm UTC

[warp-agent-staging]

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