chore: reconcile contribution rules and onboarding fixtures

Extract the guided setup test fixture without dropping cases. Supply current settings/discovery contracts and Opus 5.5 in the isolated Storybook boundary.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

ui/src/components/AgentRunnerSelect.tsx

@@ -3,7 +3,6 @@ import { Field } from "./agent-config-primitives";
 import { SelectPopover } from "./ui/select";
 import { Button } from "./ui/button";
 
-/** The override is request-level. Automatic selection is resolved by the server. */
 export function AgentRunnerSelect({
   value,
   onChange,

ui/src/components/OnboardingWizard.step.test.tsx

@@ -178,7 +178,6 @@ describe("OnboardingWizard — which step it lands on", () => {
     dialogState.onboardingOpen = false;
     dialogState.onboardingOptions = {};
     dialogState.onboardingRouteDismissed = false;
-    // The scoped discovery contract must resolve before the hire seam runs.
     mockAdaptersApi.list.mockResolvedValue(["claude_local", "codex_local"].map(type => ({
       type, loaded: true, disabled: false, defaultRunner: "legacy", supportedRunners: ["legacy"],
     })));

ui/src/components/OnboardingWizard.test.tsx

@@ -3180,7 +3180,6 @@ describe("OnboardingWizard restore-gate (stale localStorage across accounts)", (
         const { root, queryClient } = await openStep4({ adapterType: "claude_local" });
         try {
           await act(async () => {
-            // A warm value remains successful while its current fetch is pending.
             if (pending === "environments") queryClient.setQueryData(queryKeys.environments.list("company-new"), [LOCAL_ENVIRONMENT]);
             else if (pending === "settings") queryClient.setQueryData(queryKeys.instance.settings, { defaultEnvironmentId: null });
             else queryClient.setQueryData(queryKeys.instance.experimentalSettings, { enableManagedSandboxOnly: false });

ui/src/components/OnboardingWizard.tsx

@@ -1060,9 +1060,6 @@ function OnboardingWizardInner({
   }, effectiveOnboardingOpen && step === 4 && canUseLocalLogin && credentialMode !== "api" &&
     Boolean(managedProvider) && !savedSubscription && !savedKeys.storedLogin.data && !managedBindingForStep(),
   );
-  // A result from a previous selection must not hire or advance this wizard.
-  // Discovery starts after environment settings resolve. A later target or
-  // runner change invalidates the configuration an in-flight test was built from.
   useEffect(() => {
     autoConnectStartedRef.current = false;
     hiringAgentRef.current = null;