fix: keep GPC card mode during plus billing

tests/plus-checkout-billing-tab-resolution.test.js

@@ -903,10 +903,23 @@ test('Plus checkout billing reports when the payment iframe exists but cannot re
 function createGpcPageHarness(states) {
   const pageStates = Array.isArray(states) ? [...states] : [];
   const clicks = [];
+  const modeClicks = [];
   return {
     clicks,
+    modeClicks,
     run(details) {
       const source = String(details.func || '');
+      if (source.includes('cardModeButton.click')) {
+        modeClicks.push({ target: details.target?.tabId });
+        return [{
+          result: {
+            ok: true,
+            clicked: true,
+            isCardModeActive: false,
+            activeModeText: '卡密充值 使用付费卡密扣次充值',
+          },
+        }];
+      }
       if (source.includes('button.click')) {
         clicks.push({ target: details.target?.tabId });
         return [{ result: { clicked: true, buttonText: '开始 Plus 充值' } }];
@@ -925,6 +938,10 @@ function createGpcPageHarness(states) {
           hasStartButton: true,
           cardKeyValue: 'AAAA1111-BBBB2222-CCCC3333',
           sessionLength: 256,
+          hasCardMode: state.hasCardMode !== false,
+          hasFreeMode: true,
+          isCardModeActive: state.isCardModeActive !== false,
+          activeModeText: state.isCardModeActive === false ? '免费充值' : '卡密充值 使用付费卡密扣次充值',
         },
       }];
     },
@@ -1005,6 +1022,26 @@ test('GPC billing clicks start and completes after page log shows subscription d
   assert.equal(events.states.some((state) => state.gpcPageStatus === 'completed'), true);
 });
 
+test('GPC billing keeps prepared page, switches card mode, and clicks start instead of reloading home', async () => {
+  const { events, executor, pageHarness } = createGpcPageExecutorHarness([
+    { startButtonText: '停止当前任务', logText: '免费充值任务进行中', isCardModeActive: false },
+    { startButtonText: '开始 Plus 充值', logText: 'SYSTEM 页面已就绪', isCardModeActive: true },
+    { startButtonText: '任务进行中', logText: '开始处理任务', isCardModeActive: true },
+    { startButtonText: '开始 Plus 充值', logText: '订阅完成', hasSubscriptionDone: true, isCardModeActive: true },
+  ]);
+
+  await executor.executePlusCheckoutBilling({
+    plusPaymentMethod: 'gpc-helper',
+    plusCheckoutSource: 'gpc-helper',
+    plusCheckoutTabId: 77,
+  });
+
+  assert.equal(pageHarness.modeClicks.length, 1);
+  assert.equal(pageHarness.clicks.length, 1);
+  assert.equal(events.updates.some((event) => event.payload?.url === 'https://gpc.qlhazycoder.top/'), false);
+  assert.equal(events.completed.length, 1);
+});
+
 test('GPC billing restarts when start button returns without subscription done', async () => {
   const { events, executor, pageHarness } = createGpcPageExecutorHarness([
     { startButtonText: '开始 Plus 充值', logText: 'SYSTEM 页面已就绪' },

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

@@ -873,6 +873,7 @@ function createFakeGpcPrepareDom() {
       scrollIntoView() {},
       click() {
         this.clicked = true;
+        this.onClick?.();
       },
       dispatchEvent(event) {
         dispatches.push({ element: this, type: event?.type || '' });
@@ -886,6 +887,11 @@ function createFakeGpcPrepareDom() {
 
   const freeButton = createElement({ tagName: 'BUTTON', text: '免费充值' });
   const cardModeButton = createElement({ tagName: 'BUTTON', text: '卡密充值 使用付费卡密扣次充值' });
+  freeButton.className = 'active';
+  cardModeButton.onClick = () => {
+    freeButton.className = '';
+    cardModeButton.className = 'active';
+  };
   const startButton = createElement({ tagName: 'BUTTON', text: '开始 Plus 充值' });
   const cardInputs = [
     createElement({ tagName: 'INPUT', placeholder: 'XXXXXXXX', className: 'card-key-seg' }),
@@ -1004,7 +1010,7 @@ test('GPC checkout prepare opens page, fills segmented card key, and writes full
     includeSession: true,
     includeAccessToken: true,
   });
-  const executeEvent = events.find((event) => event.type === 'execute-script');
+  const executeEvent = events.find((event) => event.type === 'execute-script' && Array.isArray(event.args));
   assert.equal(executeEvent.target.tabId, 77);
   assert.equal(executeEvent.args[1], JSON.stringify(session));
   const statePayload = events.find((event) => event.type === 'set-state')?.payload || {};