Stop requiring verificationStatus in the signup response

The gateway retired the agent-key claim flow (getanyapi-com/anyapi#1307)
and will drop verificationStatus, claimToken, and claimUrl from
POST /agent/signup once the SDKs and this CLI release. The CLI never
read claimToken or claimUrl; SignupResponse.verificationStatus is now
optional so the type matches a response without it.

The CLI never validated the field at runtime, so the new test (a signup
response with none of the three fields saves the trial key) also passes
without the type change; it guards the tolerance the gateway drop
relies on.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: kev1n

__tests__/login.test.ts

@@ -175,6 +175,27 @@ describe('credential selection', () => {
       clientId: 'aa_client_trial',
     });
   });
+
+  it('saves a trial key from a signup response without the retired claim fields', async () => {
+    const homeDir = await tempDir();
+    const ctx = commandContext(homeDir, async () => json({
+      secret: 'aa_live_trial',
+      keyId: 'key_trial',
+      capUsd: 0.15,
+      expiresAt: '2026-08-09T12:00:00.000Z',
+      clientId: 'aa_client_trial',
+    }));
+
+    await signupCommand(ctx, {});
+
+    expect(await readConfig(getConfigPath(homeDir))).toEqual({
+      apiKey: 'aa_live_trial',
+      keyId: 'key_trial',
+      capUsd: 0.15,
+      expiresAt: '2026-08-09T12:00:00.000Z',
+      clientId: 'aa_client_trial',
+    });
+  });
 });
 
 describe('device token polling', () => {

src/types.ts

@@ -22,7 +22,7 @@ export interface SignupResponse {
   secret: string;
   keyId: string;
   capUsd: number;
-  verificationStatus: string;
+  verificationStatus?: string;
   expiresAt: string;
   clientId?: string;
   upgrade?: SignupUpgrade;