[Astro-Han]

Summary

• Add the stable cohere provider through Cohere's native V2 Chat API, including Bearer authentication, account-scoped paginated model discovery, exact model IDs, native reasoning control, and deterministic two-stage tool replay.
• Carry the provider through the shared registry, Runtime, Headless, CLI, Storage, and Desktop seams without introducing an OpenAI-compatible proxy path.
• Vendor Cohere's byte-identical official Lobe Icons mark through the existing provider asset-mask and third-party notice governance.

Why

Issue #860 includes Cohere direct API support in the Phase 3 provider matrix. Cohere's native Chat and model-discovery contracts differ from OpenAI-compatible APIs, so this slice adds the smallest provider-specific adapter and discovery seam needed to preserve the official wire contract and stable persisted identity.

Refs #860

Scope

This PR only adds Cohere direct API support under persisted provider ID cohere. It does not add Bedrock or Vertex Cohere, OpenAI-compatible proxies, other providers, or Phase 7 work.

Verification

• npm run rebuild — passed, including the production renderer build and third-party notice check.
• npm run typecheck — passed for every workspace.
• Core provider/catalog/thinking contracts — passed.
• Runtime provider conformance and thinking contracts — 54/54 passed, including native /v1/models pagination and the V2 two-stage tool loop.
• Storage connection contract — 35/35 passed.
• Headless provider environment and Harbor host contracts — 101/101 passed.
• CLI connection target contracts — 27/27 passed.
• Desktop icon governance — 22/22 passed.
• models.dev snapshot sync contracts — 17/17 passed.
• npm run check:stale, git diff --check, renderer notice verification, and byte comparison against the immutable upstream Cohere SVG — passed.
• Named reviewer final audit on the rebased SHA — 0 P0–P3 findings.
• A real provider smoke was not run because no safe Cohere credential was available. Local Desktop E2E is intentionally deferred to the required CI e2e check.
• No screenshot is included because this adds no new layout or interaction design: the provider uses the existing catalog/detail UI and shared computed-style asset-mask contract. The deterministic Desktop E2E covers both surfaces in CI.

Impact

Users can configure Cohere directly with a Cohere API key, discover the models available to their account, and use exact native model IDs for chat, reasoning, and tools. Existing provider identities, connections, and storage formats are unchanged; no migration is required.

Reviewer notes

The provider registry remains the single owner of identity and ordering. DeepInfra's official discovery seam remains unchanged at order 29; Cohere is appended at order 30. The vendored SVG provenance is lobehub/lobe-icons, @lobehub/icons-static-svg@1.91.0, commit e4302041fbb3039608d25f9f618bd462783b875e, path packages/static-svg/icons/cohere.svg, MIT, SHA-256 72851dd36d6ab017f535202744765eead8f99cfb5ced77e1840bfdb70db7a85c.

Ready for review

• Verification is complete and the results above are current
• Impact, compatibility, migration, documentation, and release-note needs are addressed
• User-visible UI/UX changes include visual evidence, or Verification explains why it is not applicable