fix: skip SUB2API proxy when default proxy is empty

tests/sub2api-panel-proxy.test.js

@@ -39,7 +39,7 @@ function createSub2ApiPanelContext(fetchCalls = []) {
         onMessage: { addListener() {} },
         sendMessage: async () => ({
           email: 'flow@example.com',
-          sub2apiDefaultProxyName: 'shadowrocket',
+          sub2apiDefaultProxyName: '',
         }),
       },
     },
@@ -176,3 +176,46 @@ test('SUB2API step 10 uses the same proxy for code exchange and account creation
   assert.equal(createCall.body.group_ids[0], 5);
   assert.equal(context.completed[0].step, 10);
 });
+
+test('SUB2API step 1 omits proxy_id when default proxy is empty', async () => {
+  const fetchCalls = [];
+  const context = createSub2ApiPanelContext(fetchCalls);
+
+  const result = await vm.runInContext(`
+    step1_generateOpenAiAuthUrl({
+      sub2apiEmail: 'admin@example.com',
+      sub2apiPassword: 'secret',
+      sub2apiGroupName: 'codex',
+      sub2apiDefaultProxyName: '   '
+    }, { report: false })
+  `, context);
+
+  const generateCall = fetchCalls.find((call) => call.path === '/api/v1/admin/openai/generate-auth-url');
+  assert.equal(result.sub2apiProxyId, null);
+  assert.equal(Object.hasOwn(generateCall.body, 'proxy_id'), false);
+});
+
+test('SUB2API step 10 omits proxy_id when no proxy is configured', async () => {
+  const fetchCalls = [];
+  const context = createSub2ApiPanelContext(fetchCalls);
+
+  await vm.runInContext(`
+    step9_submitOpenAiCallback({
+      localhostUrl: 'http://localhost:1455/auth/callback?code=callback-code&state=oauth-state',
+      sub2apiUrl: 'https://sub.example/admin/accounts',
+      sub2apiEmail: 'admin@example.com',
+      sub2apiPassword: 'secret',
+      sub2apiGroupName: 'codex',
+      sub2apiSessionId: 'session-1',
+      sub2apiOAuthState: 'oauth-state',
+      sub2apiGroupId: 5,
+      sub2apiDefaultProxyName: ''
+    })
+  `, context);
+
+  const exchangeCall = fetchCalls.find((call) => call.path === '/api/v1/admin/openai/exchange-code');
+  const createCall = fetchCalls.find((call) => call.path === '/api/v1/admin/accounts');
+
+  assert.equal(Object.hasOwn(exchangeCall.body, 'proxy_id'), false);
+  assert.equal(Object.hasOwn(createCall.body, 'proxy_id'), false);
+});