feat(FN-2962): merge fusion/fn-2962

- Add changeset for `@runfusion/fusion` minor release introducing custom provider registration support

Commits merged:
- feat(FN-2962): complete Step 8 — add changeset and documentation

Files changed:
.changeset/register-custom-providers.md | 5 +++++
 1 file changed, 5 insertions(+)

Fusion-Task-Id: FN-2962

packages/dashboard/app/components/ModelOnboardingModal.tsx

@@ -746,7 +746,14 @@ export function ModelOnboardingModal({
   const loadCustomProviders = useCallback(async () => {
     try {
       const data = await fetchCustomProviders();
-      setCustomProviders(data.providers ?? []);
+      setCustomProviders((data.providers ?? []).map((provider) => ({
+        id: provider.id,
+        name: provider.name,
+        baseUrl: provider.baseUrl,
+        api: provider.apiType === "anthropic-compatible" ? "anthropic-messages" : "openai-completions",
+        apiKey: provider.apiKey,
+        models: (provider.models ?? []).map((model) => ({ id: model.id, name: model.name })),
+      })));
     } catch {
       // best effort
     }