Merge origin/dev into codex2api source

- resolve the sidepanel contribution-mode test conflict while keeping the new Codex2API assertions\n- update the mail2925 payload test harness for newly added Codex2API and random-subdomain inputs\n- renumber the README quick-start plan headings and strip trailing whitespace from the new tutorial doc

background/steps/confirm-oauth.js

@@ -200,12 +200,6 @@
                 break;
               }
 
-              if (effect.restartCurrentStep) {
-                await addLog(`步骤 9：${getStep8EffectLabel(effect)}，准备重新定位“继续”按钮并重试...`, 'warn');
-                await sleepWithStop(STEP8_CLICK_RETRY_DELAY_MS);
-                continue;
-              }
-
               if (round >= STEP8_MAX_ROUNDS) {
                 throw new Error(`步骤 9：连续 ${STEP8_MAX_ROUNDS} 轮点击“继续”后页面仍无反应。`);
               }

background/steps/fetch-signup-code.js

@@ -24,6 +24,20 @@
       throwIfStopped,
     } = deps;
 
+    function getExpectedMail2925MailboxEmail(state = {}) {
+      if (Boolean(state?.mail2925UseAccountPool)) {
+        const currentAccountId = String(state?.currentMail2925AccountId || '').trim();
+        const accounts = Array.isArray(state?.mail2925Accounts) ? state.mail2925Accounts : [];
+        const currentAccount = accounts.find((account) => String(account?.id || '') === currentAccountId) || null;
+        const accountEmail = String(currentAccount?.email || '').trim().toLowerCase();
+        if (accountEmail) {
+          return accountEmail;
+        }
+      }
+
+      return String(state?.mail2925BaseEmail || '').trim().toLowerCase();
+    }
+
     async function focusOrOpenMailTab(mail) {
       const alive = await isTabAlive(mail.source);
       if (alive) {
@@ -111,6 +125,7 @@
             accountId: state.currentMail2925AccountId || null,
             forceRelogin: false,
             allowLoginWhenOnLoginPage: Boolean(state?.mail2925UseAccountPool),
+            expectedMailboxEmail: getExpectedMail2925MailboxEmail(state),
             actionLabel: '步骤 4：确认 2925 邮箱登录态',
           });
         } else {

background/steps/platform-verify.js

@@ -159,7 +159,8 @@
         source: 'background',
         payload: { localhostUrl: state.localhostUrl, vpsPassword: state.vpsPassword },
       }, {
-        timeoutMs: 30000,
+        timeoutMs: 125000,
+        responseTimeoutMs: 125000,
         retryDelayMs: 700,
         logMessage: '步骤 10：CPA 面板通信未就绪，正在等待页面恢复...',
       });