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gsxdsm 9c2a264322 FN-7398: restore Anthropic model selection

Restore Anthropic model selector discovery across API-key, OAuth subscription, and Claude CLI flows.

- Read injected auth storage when building /api/models so Settings connection state feeds model availability.
- Keep Anthropic subscription OAuth separate from direct Anthropic API-key rows while allowing enabled Claude CLI models to appear.
- Add regression coverage for selector rendering, stale empty catalog refresh, and authenticated model-route filtering.
- Document the restored Anthropic provider surfaces and add a patch changeset.

Files changed:
 .changeset/fn-7398-anthropic-model-selector.md     |   7 ++
 docs/settings-reference.md                         |   4 +-
 .../components/__tests__/ModelSelectorTab.test.tsx | 105 +++++++++++++++++
 .../app/hooks/__tests__/useModelsCache.test.ts     |  40 +++++++
 .../dashboard/src/__tests__/routes-auth.test.ts    | 125 ++++++++++++++++++++-
 .../dashboard/src/routes/register-model-routes.ts  |  60 +++++++++-
 6 files changed, 333 insertions(+), 8 deletions(-)

Fusion-Task-Id: FN-7398

Fusion-Task-Lineage: 5d1b1b8e-9b8b-40fe-b76f-7d6142e0e21f

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>

2026-07-01 15:39:34 -07:00