feat: 添加 Plus Checkout 创建后等待 20 秒的逻辑，并增加相应的测试用例

background/steps/create-plus-checkout.js

@@ -4,6 +4,7 @@
   const PLUS_CHECKOUT_SOURCE = 'plus-checkout';
   const PLUS_CHECKOUT_ENTRY_URL = 'https://chatgpt.com/';
   const PLUS_CHECKOUT_INJECT_FILES = ['content/utils.js', 'content/plus-checkout.js'];
+  const PLUS_CHECKOUT_POST_CREATE_WAIT_MS = 20000;
 
   function createPlusCheckoutCreateExecutor(deps = {}) {
     const {
@@ -64,6 +65,9 @@
         plusCheckoutCurrency: result.currency || 'EUR',
       });
 
+      await addLog('步骤 6：Plus Checkout 页面已就绪，固定等待 20 秒后继续下一步。', 'info');
+      await sleepWithStop(PLUS_CHECKOUT_POST_CREATE_WAIT_MS);
+
       await completeStepFromBackground(6, {
         plusCheckoutCountry: result.country || 'DE',
         plusCheckoutCurrency: result.currency || 'EUR',

tests/plus-checkout-create-wait.test.js

@@ -0,0 +1,55 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+
+const source = fs.readFileSync('background/steps/create-plus-checkout.js', 'utf8');
+const globalScope = {};
+const api = new Function('self', `${source}; return self.MultiPageBackgroundPlusCheckoutCreate;`)(globalScope);
+
+test('Plus checkout create waits 20 seconds before completing step 6', async () => {
+  const events = [];
+  const executor = api.createPlusCheckoutCreateExecutor({
+    addLog: async (message, level = 'info') => {
+      events.push({ type: 'log', message, level });
+    },
+    chrome: {
+      tabs: {
+        update: async (tabId, payload) => {
+          events.push({ type: 'tab-update', tabId, payload });
+        },
+      },
+    },
+    completeStepFromBackground: async (step, payload) => {
+      events.push({ type: 'complete', step, payload });
+    },
+    ensureContentScriptReadyOnTabUntilStopped: async () => {
+      events.push({ type: 'ready' });
+    },
+    reuseOrCreateTab: async () => 42,
+    sendTabMessageUntilStopped: async () => ({
+      checkoutUrl: 'https://checkout.stripe.com/c/pay/session',
+      country: 'US',
+      currency: 'USD',
+    }),
+    setState: async (payload) => {
+      events.push({ type: 'set-state', payload });
+    },
+    sleepWithStop: async (ms) => {
+      events.push({ type: 'sleep', ms });
+    },
+    waitForTabCompleteUntilStopped: async () => {
+      events.push({ type: 'tab-complete' });
+    },
+  });
+
+  await executor.executePlusCheckoutCreate();
+
+  const sleepEvents = events.filter((event) => event.type === 'sleep');
+  assert.deepStrictEqual(sleepEvents.map((event) => event.ms), [1000, 1000, 20000]);
+
+  const fixedWaitIndex = events.findIndex((event) => event.type === 'sleep' && event.ms === 20000);
+  const completeIndex = events.findIndex((event) => event.type === 'complete');
+  assert.ok(fixedWaitIndex > -1);
+  assert.ok(completeIndex > fixedWaitIndex);
+  assert.equal(events.some((event) => event.type === 'log' && /固定等待 20 秒/.test(event.message)), true);
+});