diff --git a/background.js b/background.js
index 231b633..7686a8a 100644
--- a/background.js
+++ b/background.js
@@ -5411,6 +5411,7 @@ const mail2925SessionManager = self.MultiPageBackgroundMail2925Session?.createMa
   normalizeMail2925Accounts,
   pickMail2925AccountForRun,
   requestStop,
+  ensureContentScriptReadyOnTab,
   reuseOrCreateTab,
   sendToContentScriptResilient,
   sendToMailContentScriptResilient,
@@ -5419,6 +5420,7 @@ const mail2925SessionManager = self.MultiPageBackgroundMail2925Session?.createMa
   sleepWithStop,
   throwIfStopped,
   upsertMail2925AccountInList,
+  waitForTabUrlMatch,
 });
 
 async function upsertMail2925Account(input = {}) {
diff --git a/background/mail-2925-session.js b/background/mail-2925-session.js
index 3bdc609..4649231 100644
--- a/background/mail-2925-session.js
+++ b/background/mail-2925-session.js
@@ -15,6 +15,7 @@
       pickMail2925AccountForRun,
       getState,
       isAutoRunLockedState,
+      ensureContentScriptReadyOnTab,
       requestStop,
       reuseOrCreateTab,
       sendToContentScriptResilient,
@@ -24,11 +25,12 @@
       sleepWithStop,
       throwIfStopped,
       upsertMail2925AccountInList,
+      waitForTabUrlMatch,
     } = deps;
 
     const MAIL2925_SOURCE = 'mail-2925';
     const MAIL2925_URL = 'https://2925.com/#/mailList';
-    const MAIL2925_LOGIN_URL = 'https://2925.com/';
+    const MAIL2925_LOGIN_URL = 'https://2925.com/login/';
     const MAIL2925_INJECT = ['content/utils.js', 'content/mail-2925.js'];
     const MAIL2925_INJECT_SOURCE = 'mail-2925';
     const MAIL2925_COOKIE_DOMAINS = [
@@ -387,7 +389,8 @@
       }
 
       throwIfStopped();
-      await reuseOrCreateTab(MAIL2925_SOURCE, forceRelogin ? MAIL2925_LOGIN_URL : MAIL2925_URL, {
+      const targetUrl = forceRelogin ? MAIL2925_LOGIN_URL : MAIL2925_URL;
+      const tabId = await reuseOrCreateTab(MAIL2925_SOURCE, targetUrl, {
         inject: MAIL2925_INJECT,
         injectSource: MAIL2925_INJECT_SOURCE,
       });
@@ -497,13 +500,40 @@
 
       throwIfStopped();
       await addLog(`2925：准备打开登录页 ${MAIL2925_LOGIN_URL}（forceRelogin=${forceRelogin ? 'true' : 'false'}）`, 'info');
-      await reuseOrCreateTab(MAIL2925_SOURCE, forceRelogin ? MAIL2925_LOGIN_URL : MAIL2925_URL, {
+      const targetUrl = forceRelogin ? MAIL2925_LOGIN_URL : MAIL2925_URL;
+      const tabId = await reuseOrCreateTab(MAIL2925_SOURCE, targetUrl, {
         inject: MAIL2925_INJECT,
         injectSource: MAIL2925_INJECT_SOURCE,
       });
       const openedUrl = await getMail2925CurrentTabUrl();
       await addLog(`2925：打开页后当前标签地址：${openedUrl || 'unknown'}`, 'info');
 
+      if (forceRelogin && typeof waitForTabUrlMatch === 'function') {
+        const matchedLoginTab = await waitForTabUrlMatch(
+          tabId,
+          (url) => {
+            try {
+              const parsed = new URL(String(url || ''));
+              return (parsed.hostname === '2925.com' || parsed.hostname === 'www.2925.com')
+                && /^\/login\/?$/.test(parsed.pathname);
+            } catch {
+              return false;
+            }
+          },
+          { timeoutMs: 15000, retryDelayMs: 300 }
+        );
+        await addLog(`2925：等待最终落到登录页结果：${matchedLoginTab?.url || 'timeout'}`, matchedLoginTab ? 'info' : 'warn');
+        if (matchedLoginTab && typeof ensureContentScriptReadyOnTab === 'function') {
+          await ensureContentScriptReadyOnTab(MAIL2925_SOURCE, tabId, {
+            inject: MAIL2925_INJECT,
+            injectSource: MAIL2925_INJECT_SOURCE,
+            timeoutMs: 20000,
+            retryDelayMs: 800,
+            logMessage: '步骤 0：2925 登录页内容脚本未就绪，正在等待页面稳定后继续登录...',
+          });
+        }
+      }
+
       if (forceRelogin && typeof sleepWithStop === 'function') {
         await addLog('2925：登录页已打开，等待 3 秒后开始检查输入框并执行登录...', 'info');
         await sleepWithStop(3000);
diff --git a/background/steps/fetch-login-code.js b/background/steps/fetch-login-code.js
index 40dec9a..9e16ab6 100644
--- a/background/steps/fetch-login-code.js
+++ b/background/steps/fetch-login-code.js
@@ -1,6 +1,8 @@
 (function attachBackgroundStep8(root, factory) {
   root.MultiPageBackgroundStep8 = factory();
 })(typeof self !== 'undefined' ? self : globalThis, function createBackgroundStep8Module() {
+  const MAIL_2925_FILTER_LOOKBACK_MS = 10 * 60 * 1000;
+
   function createStep8Executor(deps = {}) {
     const {
       addLog,
@@ -61,6 +63,9 @@
       if (mail.error) throw new Error(mail.error);
 
       const stepStartedAt = Date.now();
+      const verificationFilterAfterTimestamp = mail.provider === '2925'
+        ? Math.max(0, stepStartedAt - MAIL_2925_FILTER_LOOKBACK_MS)
+        : stepStartedAt;
       const verificationSessionKey = `8:${stepStartedAt}`;
       const authTabId = await getTabId('signup-page');
 
@@ -140,7 +145,7 @@
         ...state,
         step8VerificationTargetEmail: displayedVerificationEmail || '',
       }, mail, {
-        filterAfterTimestamp: mail.provider === '2925' ? 0 : stepStartedAt,
+        filterAfterTimestamp: verificationFilterAfterTimestamp,
         sessionKey: verificationSessionKey,
         disableTimeBudgetCap: mail.provider === '2925',
         getRemainingTimeMs: getStep8RemainingTimeResolver(state?.oauthUrl || ''),
diff --git a/background/steps/fetch-signup-code.js b/background/steps/fetch-signup-code.js
index fb5a1d6..e85b250 100644
--- a/background/steps/fetch-signup-code.js
+++ b/background/steps/fetch-signup-code.js
@@ -1,6 +1,8 @@
 (function attachBackgroundStep4(root, factory) {
   root.MultiPageBackgroundStep4 = factory();
 })(typeof self !== 'undefined' ? self : globalThis, function createBackgroundStep4Module() {
+  const MAIL_2925_FILTER_LOOKBACK_MS = 10 * 60 * 1000;
+
   function createStep4Executor(deps = {}) {
     const {
       addLog,
@@ -26,6 +28,9 @@
       const mail = getMailConfig(state);
       if (mail.error) throw new Error(mail.error);
       const stepStartedAt = Date.now();
+      const verificationFilterAfterTimestamp = mail.provider === '2925'
+        ? Math.max(0, stepStartedAt - MAIL_2925_FILTER_LOOKBACK_MS)
+        : stepStartedAt;
       const verificationSessionKey = `4:${stepStartedAt}`;
       const signupTabId = await getTabId('signup-page');
       if (!signupTabId) {
@@ -101,7 +106,7 @@
       }
 
       await resolveVerificationStep(4, state, mail, {
-        filterAfterTimestamp: mail.provider === '2925' ? 0 : stepStartedAt,
+        filterAfterTimestamp: verificationFilterAfterTimestamp,
         sessionKey: verificationSessionKey,
         disableTimeBudgetCap: mail.provider === '2925',
         requestFreshCodeFirst: mail.provider === HOTMAIL_PROVIDER ? false : true,
diff --git a/background/verification-flow.js b/background/verification-flow.js
index db497a5..56a428e 100644
--- a/background/verification-flow.js
+++ b/background/verification-flow.js
@@ -239,12 +239,16 @@
       return requestedAt;
     }
 
-    function shouldPreclear2925Mailbox(step, mail) {
-      return mail?.provider === '2925' && (step === 4 || step === 8);
+    function shouldPreclear2925Mailbox(step, mail, options = {}) {
+      if (mail?.provider !== '2925' || (step !== 4 && step !== 8)) {
+        return false;
+      }
+
+      return !(Number(options.filterAfterTimestamp) > 0);
     }
 
     async function clear2925MailboxBeforePolling(step, mail, options = {}) {
-      if (!shouldPreclear2925Mailbox(step, mail)) {
+      if (!shouldPreclear2925Mailbox(step, mail, options)) {
         return;
       }
 
diff --git a/content/mail-2925.js b/content/mail-2925.js
index 4c036b1..54970d2 100644
--- a/content/mail-2925.js
+++ b/content/mail-2925.js
@@ -629,6 +629,13 @@ function extractVerificationCode(text, strictChatGPTCodeOnly = false) {
   return null;
 }
 
+function normalizeMinuteTimestamp(timestamp) {
+  if (!Number.isFinite(timestamp) || timestamp <= 0) return 0;
+  const date = new Date(timestamp);
+  date.setSeconds(0, 0);
+  return date.getTime();
+}
+
 function parseMailItemTimestamp(item) {
   const timeText = getMailItemTimeText(item);
   if (!timeText) return null;
@@ -920,10 +927,12 @@ async function handlePollEmail(step, payload) {
     subjectFilters,
     maxAttempts,
     intervalMs,
+    filterAfterTimestamp = 0,
     excludeCodes = [],
     strictChatGPTCodeOnly = false,
   } = payload || {};
   const excludedCodeSet = new Set(excludeCodes.filter(Boolean));
+  const filterAfterMinute = normalizeMinuteTimestamp(Number(filterAfterTimestamp) || 0);
   if (typeof throwIfMail2925LimitReached === 'function') {
     throwIfMail2925LimitReached();
   }
@@ -975,6 +984,11 @@ async function handlePollEmail(step, payload) {
       for (let index = 0; index < items.length; index += 1) {
         const item = items[index];
         const itemTimestamp = parseMailItemTimestamp(item);
+        const itemMinute = normalizeMinuteTimestamp(itemTimestamp || 0);
+
+        if (filterAfterMinute && (!itemMinute || itemMinute < filterAfterMinute)) {
+          continue;
+        }
 
         const previewText = getMailItemText(item);
         if (!matchesMailFilters(previewText, senderFilters, subjectFilters)) {
diff --git a/manifest.json b/manifest.json
index 43834c0..c395652 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,8 +1,8 @@
 {
   "manifest_version": 3,
   "name": "多页面自动化",
-  "version": "4.9",
-  "version_name": "Pro4.9",
+  "version": "5.0",
+  "version_name": "Pro5.0",
   "description": "用于自动执行多步骤 OAuth 注册流程",
   "permissions": [
     "sidePanel",
diff --git a/sidepanel/contribution-content-update-service.js b/sidepanel/contribution-content-update-service.js
new file mode 100644
index 0000000..53db4e1
--- /dev/null
+++ b/sidepanel/contribution-content-update-service.js
@@ -0,0 +1,147 @@
+(() => {
+  const PORTAL_BASE_URL = 'https://apikey.qzz.io';
+  const CONTENT_SUMMARY_API_URL = `${PORTAL_BASE_URL}/api/content-summary`;
+  const CACHE_KEY = 'multipage-contribution-content-summary-v1';
+  const FETCH_TIMEOUT_MS = 6000;
+
+  function sanitizeItem(item = {}) {
+    return {
+      slug: String(item?.slug || '').trim(),
+      title: String(item?.title || '').trim(),
+      isEnabled: Boolean(item?.is_enabled),
+      hasContent: Boolean(item?.has_content),
+      isVisible: Boolean(item?.is_visible),
+      updatedAt: String(item?.updated_at || '').trim(),
+      updatedAtDisplay: String(item?.updated_at_display || '').trim(),
+    };
+  }
+
+  function buildSnapshot(payload = {}) {
+    const items = Array.isArray(payload?.items)
+      ? payload.items.map(sanitizeItem).filter((item) => item.slug)
+      : [];
+    const promptVersion = String(payload?.prompt_version || '').trim();
+    const latestUpdatedAt = String(payload?.latest_updated_at || '').trim();
+    const latestUpdatedAtDisplay = String(payload?.latest_updated_at_display || '').trim();
+    const hasVisibleUpdates = Boolean(payload?.has_visible_updates) && Boolean(promptVersion);
+
+    return {
+      status: hasVisibleUpdates ? 'update-available' : 'idle',
+      promptVersion,
+      hasVisibleUpdates,
+      latestUpdatedAt,
+      latestUpdatedAtDisplay,
+      items,
+      portalUrl: PORTAL_BASE_URL,
+      apiUrl: CONTENT_SUMMARY_API_URL,
+      checkedAt: Date.now(),
+    };
+  }
+
+  function readCache() {
+    try {
+      const raw = localStorage.getItem(CACHE_KEY);
+      if (!raw) {
+        return null;
+      }
+
+      const parsed = JSON.parse(raw);
+      if (!parsed || typeof parsed !== 'object') {
+        return null;
+      }
+
+      const snapshot = buildSnapshot({
+        items: parsed.items,
+        prompt_version: parsed.promptVersion,
+        has_visible_updates: parsed.hasVisibleUpdates,
+        latest_updated_at: parsed.latestUpdatedAt,
+        latest_updated_at_display: parsed.latestUpdatedAtDisplay,
+      });
+      if (!Number.isFinite(parsed.checkedAt)) {
+        return snapshot;
+      }
+      snapshot.checkedAt = parsed.checkedAt;
+      return snapshot;
+    } catch (error) {
+      return null;
+    }
+  }
+
+  function writeCache(snapshot) {
+    try {
+      localStorage.setItem(CACHE_KEY, JSON.stringify(snapshot));
+    } catch (error) {
+      // Ignore cache write failures.
+    }
+  }
+
+  async function fetchContentSummary() {
+    const controller = new AbortController();
+    const timeoutId = setTimeout(() => controller.abort(), FETCH_TIMEOUT_MS);
+
+    try {
+      const response = await fetch(CONTENT_SUMMARY_API_URL, {
+        method: 'GET',
+        headers: {
+          Accept: 'application/json',
+        },
+        cache: 'no-store',
+        signal: controller.signal,
+      });
+
+      if (!response.ok) {
+        throw new Error(`内容摘要请求失败：${response.status}`);
+      }
+
+      const payload = await response.json();
+      if (!payload || payload.ok !== true) {
+        throw new Error('内容摘要返回格式异常');
+      }
+
+      const snapshot = buildSnapshot(payload);
+      writeCache(snapshot);
+      return snapshot;
+    } catch (error) {
+      if (error?.name === 'AbortError') {
+        throw new Error('内容摘要请求超时');
+      }
+      throw error;
+    } finally {
+      clearTimeout(timeoutId);
+    }
+  }
+
+  async function getContentUpdateSnapshot() {
+    try {
+      return await fetchContentSummary();
+    } catch (error) {
+      const cached = readCache();
+      if (cached) {
+        return {
+          ...cached,
+          fromCache: true,
+          errorMessage: error?.message || '内容摘要获取失败',
+        };
+      }
+
+      return {
+        status: 'error',
+        promptVersion: '',
+        hasVisibleUpdates: false,
+        latestUpdatedAt: '',
+        latestUpdatedAtDisplay: '',
+        items: [],
+        portalUrl: PORTAL_BASE_URL,
+        apiUrl: CONTENT_SUMMARY_API_URL,
+        checkedAt: Date.now(),
+        errorMessage: error?.message || '内容摘要获取失败',
+      };
+    }
+  }
+
+  window.SidepanelContributionContentService = {
+    getContentUpdateSnapshot,
+    portalUrl: PORTAL_BASE_URL,
+    apiUrl: CONTENT_SUMMARY_API_URL,
+  };
+})();
diff --git a/sidepanel/sidepanel.css b/sidepanel/sidepanel.css
index 09e8a71..87558d9 100644
--- a/sidepanel/sidepanel.css
+++ b/sidepanel/sidepanel.css
@@ -243,6 +243,76 @@ header {
   color: var(--orange);
 }
 
+.contribution-entry {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+  gap: 6px;
+  position: relative;
+}
+
+.contribution-update-hint {
+  position: relative;
+  display: flex;
+  align-items: flex-start;
+  gap: 8px;
+  max-width: 220px;
+  margin-left: 6px;
+  padding: 8px 10px;
+  background: color-mix(in srgb, var(--amber) 10%, var(--bg-base));
+  border: 1px solid color-mix(in srgb, var(--amber) 34%, var(--border));
+  border-radius: 10px;
+  box-shadow: var(--shadow-sm);
+}
+
+.contribution-update-hint::before {
+  content: '';
+  position: absolute;
+  top: -7px;
+  left: 14px;
+  width: 12px;
+  height: 12px;
+  background: inherit;
+  border-top: inherit;
+  border-left: inherit;
+  transform: rotate(45deg);
+}
+
+.contribution-update-hint-text {
+  font-size: 12px;
+  line-height: 1.45;
+  color: var(--text-primary);
+}
+
+.contribution-update-hint-close {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 20px;
+  height: 20px;
+  padding: 0;
+  border: none;
+  border-radius: 999px;
+  background: transparent;
+  color: var(--text-secondary);
+  font: inherit;
+  font-size: 14px;
+  line-height: 1;
+  cursor: pointer;
+  flex-shrink: 0;
+  transition: background var(--transition), color var(--transition);
+}
+
+.contribution-update-hint-close:hover {
+  background: color-mix(in srgb, var(--amber) 16%, transparent);
+  color: var(--text-primary);
+}
+
+.contribution-update-hint-close:focus-visible {
+  outline: 2px solid color-mix(in srgb, var(--amber) 34%, transparent);
+  outline-offset: 1px;
+}
+
 /* ============================================================
    Theme Toggle
    ============================================================ */
@@ -366,7 +436,7 @@ header {
 
 .run-group {
   display: flex;
-  align-items: center;
+  align-items: flex-start;
   gap: 4px;
   flex-wrap: wrap;
 }
diff --git a/sidepanel/sidepanel.html b/sidepanel/sidepanel.html
index 33dfdae..0215ae8 100644
--- a/sidepanel/sidepanel.html
+++ b/sidepanel/sidepanel.html
@@ -34,8 +34,17 @@
     </div>
     <div class="header-btns">
       <div class="run-group">
-        <button id="btn-contribution-mode" class="btn btn-outline btn-sm btn-contribution-mode" type="button"
-          aria-pressed="false" title="进入贡献模式并打开上传页">贡献/使用</button>
+        <div class="contribution-entry">
+          <button id="btn-contribution-mode" class="btn btn-outline btn-sm btn-contribution-mode" type="button"
+            aria-pressed="false" title="进入贡献模式并打开上传页">贡献/使用</button>
+          <div id="contribution-update-hint" class="contribution-update-hint" aria-live="polite" hidden>
+            <p id="contribution-update-hint-text" class="contribution-update-hint-text">
+              公告 / 使用教程有更新了，可点上方“贡献/使用”查看。
+            </p>
+            <button id="btn-dismiss-contribution-update-hint" class="contribution-update-hint-close" type="button"
+              aria-label="关闭更新提示" title="关闭更新提示">×</button>
+          </div>
+        </div>
         <input type="number" id="input-run-count" class="run-count-input" value="1" min="1" max="50" title="运行次数" />
         <button id="btn-auto-run" class="btn btn-success" title="自动执行全部步骤">
           <svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor">
@@ -724,6 +733,7 @@
   <script src="../luckmail-utils.js"></script>
   <script src="../data/step-definitions.js"></script>
   <script src="update-service.js"></script>
+  <script src="contribution-content-update-service.js"></script>
   <script src="hotmail-manager.js"></script>
   <script src="mail-2925-manager.js"></script>
   <script src="icloud-manager.js"></script>
diff --git a/sidepanel/sidepanel.js b/sidepanel/sidepanel.js
index 21283b0..65a5361 100644
--- a/sidepanel/sidepanel.js
+++ b/sidepanel/sidepanel.js
@@ -57,6 +57,9 @@ const btnSaveSettings = document.getElementById('btn-save-settings');
 const btnStop = document.getElementById('btn-stop');
 const btnReset = document.getElementById('btn-reset');
 const btnContributionMode = document.getElementById('btn-contribution-mode');
+const contributionUpdateHint = document.getElementById('contribution-update-hint');
+const contributionUpdateHintText = document.getElementById('contribution-update-hint-text');
+const btnDismissContributionUpdateHint = document.getElementById('btn-dismiss-contribution-update-hint');
 const stepsProgress = document.getElementById('steps-progress');
 const btnAutoRun = document.getElementById('btn-auto-run');
 const btnAutoContinue = document.getElementById('btn-auto-continue');
@@ -243,6 +246,7 @@ const MAIL_2925_MODE_RECEIVE = 'receive';
 const DEFAULT_MAIL_2925_MODE = MAIL_2925_MODE_PROVIDE;
 const AUTO_SKIP_FAILURES_PROMPT_DISMISSED_STORAGE_KEY = 'multipage-auto-skip-failures-prompt-dismissed';
 const AUTO_RUN_FALLBACK_RISK_PROMPT_DISMISSED_STORAGE_KEY = 'multipage-auto-run-fallback-risk-prompt-dismissed';
+const CONTRIBUTION_CONTENT_PROMPT_DISMISSED_VERSION_STORAGE_KEY = 'multipage-contribution-content-prompt-dismissed-version';
 const AUTO_RUN_FALLBACK_RISK_WARNING_MIN_RUNS = 15;
 const AUTO_RUN_FALLBACK_RISK_RECOMMENDED_THREAD_INTERVAL_MINUTES = 5;
 const HOTMAIL_SERVICE_MODE_REMOTE = 'remote';
@@ -500,6 +504,8 @@ let scheduledCountdownTimer = null;
 let configMenuOpen = false;
 let configActionInFlight = false;
 let currentReleaseSnapshot = null;
+let currentContributionContentSnapshot = null;
+let contributionContentSnapshotRequestInFlight = null;
 
 const EYE_OPEN_ICON = '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M1 12s4-7 11-7 11 7 11 7-4 7-11 7S1 12 1 12z"/><circle cx="12" cy="12" r="3"/></svg>';
 const EYE_CLOSED_ICON = '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M17.94 17.94A10.94 10.94 0 0 1 12 19C5 19 1 12 1 12a21.77 21.77 0 0 1 5.06-6.94"/><path d="M9.9 4.24A10.94 10.94 0 0 1 12 5c7 0 11 7 11 7a21.86 21.86 0 0 1-2.16 3.19"/><path d="M1 1l22 22"/><path d="M14.12 14.12a3 3 0 1 1-4.24-4.24"/></svg>';
@@ -517,6 +523,7 @@ const normalizeLuckmailTimestampValue = window.LuckMailUtils?.normalizeTimestamp
     return Number.isFinite(timestamp) ? timestamp : 0;
   });
 const sidepanelUpdateService = window.SidepanelUpdateService;
+const contributionContentService = window.SidepanelContributionContentService;
 const DEFAULT_LUCKMAIL_PRESERVE_TAG_NAME = window.LuckMailUtils?.DEFAULT_LUCKMAIL_PRESERVE_TAG_NAME || '保留';
 const normalizeIcloudHost = window.IcloudUtils?.normalizeIcloudHost
   || ((value) => {
@@ -827,6 +834,19 @@ function setPromptDismissed(storageKey, dismissed) {
   }
 }
 
+function getDismissedContributionContentPromptVersion() {
+  return String(localStorage.getItem(CONTRIBUTION_CONTENT_PROMPT_DISMISSED_VERSION_STORAGE_KEY) || '').trim();
+}
+
+function setDismissedContributionContentPromptVersion(version) {
+  const normalized = String(version || '').trim();
+  if (normalized) {
+    localStorage.setItem(CONTRIBUTION_CONTENT_PROMPT_DISMISSED_VERSION_STORAGE_KEY, normalized);
+  } else {
+    localStorage.removeItem(CONTRIBUTION_CONTENT_PROMPT_DISMISSED_VERSION_STORAGE_KEY);
+  }
+}
+
 function isAutoSkipFailuresPromptDismissed() {
   return isPromptDismissed(AUTO_SKIP_FAILURES_PROMPT_DISMISSED_STORAGE_KEY);
 }
@@ -2289,6 +2309,81 @@ async function initializeReleaseInfo() {
   renderReleaseSnapshot(snapshot);
 }
 
+function getContributionUpdateHintMessage(snapshot = currentContributionContentSnapshot) {
+  if (!snapshot?.promptVersion) {
+    return '';
+  }
+
+  return '公告 / 使用教程有更新了，可点上方“贡献/使用”查看。';
+}
+
+function shouldShowContributionUpdateHint(snapshot = currentContributionContentSnapshot) {
+  const promptVersion = String(snapshot?.promptVersion || '').trim();
+  if (!contributionUpdateHint || !contributionUpdateHintText || !btnContributionMode) {
+    return false;
+  }
+  if (!promptVersion) {
+    return false;
+  }
+  if (promptVersion === getDismissedContributionContentPromptVersion()) {
+    return false;
+  }
+  if (latestState?.contributionMode) {
+    return false;
+  }
+  return !btnContributionMode.disabled;
+}
+
+function renderContributionUpdateHint(snapshot = currentContributionContentSnapshot) {
+  if (!contributionUpdateHint) {
+    return;
+  }
+
+  const visible = shouldShowContributionUpdateHint(snapshot);
+  contributionUpdateHint.hidden = !visible;
+  if (!visible || !contributionUpdateHintText) {
+    return;
+  }
+
+  contributionUpdateHintText.textContent = getContributionUpdateHintMessage(snapshot);
+}
+
+function dismissContributionUpdateHint() {
+  const promptVersion = String(currentContributionContentSnapshot?.promptVersion || '').trim();
+  if (promptVersion) {
+    setDismissedContributionContentPromptVersion(promptVersion);
+  }
+  renderContributionUpdateHint();
+}
+
+async function refreshContributionContentHint() {
+  if (!contributionContentService?.getContentUpdateSnapshot) {
+    currentContributionContentSnapshot = null;
+    renderContributionUpdateHint();
+    return null;
+  }
+  if (contributionContentSnapshotRequestInFlight) {
+    return contributionContentSnapshotRequestInFlight;
+  }
+
+  contributionContentSnapshotRequestInFlight = contributionContentService.getContentUpdateSnapshot()
+    .then((snapshot) => {
+      currentContributionContentSnapshot = snapshot;
+      renderContributionUpdateHint(snapshot);
+      return snapshot;
+    })
+    .catch((error) => {
+      currentContributionContentSnapshot = null;
+      renderContributionUpdateHint(null);
+      throw error;
+    })
+    .finally(() => {
+      contributionContentSnapshotRequestInFlight = null;
+    });
+
+  return contributionContentSnapshotRequestInFlight;
+}
+
 function syncPasswordField(state) {
   inputPassword.value = state?.contributionMode ? '' : (state.customPassword || state.password || '');
 }
@@ -3367,12 +3462,16 @@ const contributionModeManager = window.SidepanelContributionMode?.createContribu
     sendMessage: (message) => chrome.runtime.sendMessage(message),
   },
   constants: {
-    contributionOauthUrl: 'https://apikey.qzz.io/oauth/',
-    contributionUploadUrl: 'https://apikey.qzz.io',
+    contributionOauthUrl: `${contributionContentService?.portalUrl || 'https://apikey.qzz.io'}/oauth/`,
+    contributionUploadUrl: contributionContentService?.portalUrl || 'https://apikey.qzz.io',
   },
 });
-const renderContributionMode = contributionModeManager?.render
+const baseRenderContributionMode = contributionModeManager?.render
   || (() => { });
+const renderContributionMode = () => {
+  baseRenderContributionMode();
+  renderContributionUpdateHint();
+};
 const bindContributionModeEvents = contributionModeManager?.bindEvents
   || (() => { });
 bindContributionModeEvents();
@@ -3693,6 +3792,11 @@ extensionUpdateStatus?.addEventListener('click', () => {
   openReleaseListPage();
 });
 
+btnDismissContributionUpdateHint?.addEventListener('click', (event) => {
+  event.stopPropagation();
+  dismissContributionUpdateHint();
+});
+
 configMenu?.addEventListener('click', (event) => {
   event.stopPropagation();
 });
@@ -3728,6 +3832,12 @@ autoStartModal?.addEventListener('click', (event) => {
 btnAutoStartClose?.addEventListener('click', () => resolveModalChoice(null));
 
 async function startAutoRunFromCurrentSettings() {
+  try {
+    await refreshContributionContentHint();
+  } catch (error) {
+    console.warn('Failed to refresh contribution content hint before auto run:', error);
+  }
+
   const totalRuns = getRunCountValue();
   let mode = 'restart';
   const autoRunSkipFailures = inputAutoSkipFailures.checked;
@@ -3789,57 +3899,7 @@ async function startAutoRunFromCurrentSettings() {
 // Auto Run
 btnAutoRun.addEventListener('click', async () => {
   try {
-    return await startAutoRunFromCurrentSettings();
-    const totalRuns = getRunCountValue();
-    let mode = 'restart';
-    const autoRunSkipFailures = inputAutoSkipFailures.checked;
-    const fallbackThreadIntervalMinutes = normalizeAutoRunThreadIntervalMinutes(
-      inputAutoSkipFailuresThreadIntervalMinutes.value
-    );
-    inputAutoSkipFailuresThreadIntervalMinutes.value = String(fallbackThreadIntervalMinutes);
-
-    if (shouldOfferAutoModeChoice()) {
-      const startStep = getFirstUnfinishedStep();
-      const runningStep = getRunningSteps()[0] ?? null;
-      const choice = await openAutoStartChoiceDialog(startStep, { runningStep });
-      if (!choice) {
-        return;
-      }
-      mode = choice;
-    }
-
-    if (shouldWarnAutoRunFallbackRisk(totalRuns, autoRunSkipFailures)
-      && !isAutoRunFallbackRiskPromptDismissed()) {
-      const result = await openAutoRunFallbackRiskConfirmModal(totalRuns, fallbackThreadIntervalMinutes);
-      if (!result.confirmed) {
-        return;
-      }
-      if (result.dismissPrompt) {
-        setAutoRunFallbackRiskPromptDismissed(true);
-      }
-    }
-
-    btnAutoRun.disabled = true;
-    inputRunCount.disabled = true;
-    const delayEnabled = inputAutoDelayEnabled.checked;
-    const delayMinutes = normalizeAutoDelayMinutes(inputAutoDelayMinutes.value);
-    inputAutoDelayMinutes.value = String(delayMinutes);
-    btnAutoRun.innerHTML = delayEnabled
-      ? '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><path d="M12 6v6l4 2"/></svg> 计划中...'
-      : '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><path d="M12 6v6l4 2"/></svg> 运行中...';
-    const response = await chrome.runtime.sendMessage({
-      type: delayEnabled ? 'SCHEDULE_AUTO_RUN' : 'AUTO_RUN',
-      source: 'sidepanel',
-      payload: {
-        totalRuns,
-        delayMinutes,
-        autoRunSkipFailures,
-        mode,
-      },
-    });
-    if (response?.error) {
-      throw new Error(response.error);
-    }
+    await startAutoRunFromCurrentSettings();
   } catch (err) {
     setDefaultAutoRunButton();
     inputRunCount.disabled = false;
@@ -4786,4 +4846,8 @@ loadHeroSmsCountries().catch((err) => {
   updatePanelModeUI();
   updateButtonStates();
   updateStatusDisplay(latestState);
+  return refreshContributionContentHint();
+}).catch((err) => {
+  console.error('Failed to initialize sidepanel state:', err);
+});
 }));
diff --git a/tests/background-mail2925-relogin-wait.test.js b/tests/background-mail2925-relogin-wait.test.js
index fe7634b..1f3cd4a 100644
--- a/tests/background-mail2925-relogin-wait.test.js
+++ b/tests/background-mail2925-relogin-wait.test.js
@@ -3,6 +3,11 @@ const assert = require('node:assert/strict');
 const fs = require('node:fs');
 const mail2925Utils = require('../mail2925-utils.js');
 
+test('background mail2925 session uses /login/ as relogin entry url', () => {
+  const source = fs.readFileSync('background/mail-2925-session.js', 'utf8');
+  assert.match(source, /const MAIL2925_LOGIN_URL = 'https:\/\/2925\.com\/login\/';/);
+});
+
 test('ensureMail2925MailboxSession waits 3 seconds before and after opening login page on force relogin', async () => {
   const source = fs.readFileSync('background/mail-2925-session.js', 'utf8');
   const globalScope = {};
@@ -17,6 +22,8 @@ test('ensureMail2925MailboxSession waits 3 seconds before and after opening logi
   };
   const events = {
     sleeps: [],
+    openedUrls: [],
+    readyCalls: 0,
   };
 
   const manager = api.createMail2925SessionManager({
@@ -41,7 +48,13 @@ test('ensureMail2925MailboxSession waits 3 seconds before and after opening logi
     normalizeMail2925Accounts: mail2925Utils.normalizeMail2925Accounts,
     pickMail2925AccountForRun: mail2925Utils.pickMail2925AccountForRun,
     requestStop: async () => {},
-    reuseOrCreateTab: async () => 1,
+    ensureContentScriptReadyOnTab: async () => {
+      events.readyCalls += 1;
+    },
+    reuseOrCreateTab: async (_source, url) => {
+      events.openedUrls.push(url);
+      return 1;
+    },
     sendToMailContentScriptResilient: async () => ({ loggedIn: true }),
     setPersistentSettings: async (payload) => {
       currentState = { ...currentState, ...payload };
@@ -54,6 +67,7 @@ test('ensureMail2925MailboxSession waits 3 seconds before and after opening logi
     },
     throwIfStopped: () => {},
     upsertMail2925AccountInList: mail2925Utils.upsertMail2925AccountInList,
+    waitForTabUrlMatch: async () => ({ url: 'https://2925.com/login/' }),
   });
 
   await manager.ensureMail2925MailboxSession({
@@ -62,5 +76,7 @@ test('ensureMail2925MailboxSession waits 3 seconds before and after opening logi
     actionLabel: '步骤 4：确认 2925 邮箱登录态',
   });
 
+  assert.deepStrictEqual(events.openedUrls, ['https://2925.com/login/']);
   assert.deepStrictEqual(events.sleeps, [3000, 3000]);
+  assert.equal(events.readyCalls, 1);
 });
diff --git a/tests/background-step4-filter-window.test.js b/tests/background-step4-filter-window.test.js
new file mode 100644
index 0000000..cced4bc
--- /dev/null
+++ b/tests/background-step4-filter-window.test.js
@@ -0,0 +1,57 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+
+const source = fs.readFileSync('background/steps/fetch-signup-code.js', 'utf8');
+const globalScope = {};
+const api = new Function('self', `${source}; return self.MultiPageBackgroundStep4;`)(globalScope);
+
+test('step 4 passes a fixed 10-minute lookback window to 2925 mailbox polling', async () => {
+  let capturedOptions = null;
+  const realDateNow = Date.now;
+  Date.now = () => 700000;
+
+  const executor = api.createStep4Executor({
+    addLog: async () => {},
+    chrome: {
+      tabs: {
+        update: async () => {},
+      },
+    },
+    completeStepFromBackground: async () => {},
+    confirmCustomVerificationStepBypass: async () => {},
+    ensureMail2925MailboxSession: async () => {},
+    getMailConfig: () => ({
+      provider: '2925',
+      label: '2925 邮箱',
+      source: 'mail-2925',
+      url: 'https://2925.com',
+    }),
+    getTabId: async () => 1,
+    HOTMAIL_PROVIDER: 'hotmail-api',
+    isTabAlive: async () => true,
+    LUCKMAIL_PROVIDER: 'luckmail-api',
+    CLOUDFLARE_TEMP_EMAIL_PROVIDER: 'cloudflare-temp-email',
+    resolveVerificationStep: async (_step, _state, _mail, options) => {
+      capturedOptions = options;
+    },
+    reuseOrCreateTab: async () => {},
+    sendToContentScriptResilient: async () => ({}),
+    shouldUseCustomRegistrationEmail: () => false,
+    STANDARD_MAIL_VERIFICATION_RESEND_INTERVAL_MS: 25000,
+    throwIfStopped: () => {},
+  });
+
+  try {
+    await executor.executeStep4({
+      email: 'user@example.com',
+      password: 'secret',
+      mail2925UseAccountPool: false,
+    });
+  } finally {
+    Date.now = realDateNow;
+  }
+
+  assert.equal(capturedOptions.filterAfterTimestamp, 100000);
+  assert.equal(capturedOptions.resendIntervalMs, 0);
+});
diff --git a/tests/background-step7-recovery.test.js b/tests/background-step7-recovery.test.js
index c117f69..2503e7a 100644
--- a/tests/background-step7-recovery.test.js
+++ b/tests/background-step7-recovery.test.js
@@ -89,8 +89,10 @@ test('step 8 submits login verification directly without replaying step 7', asyn
   ]);
 });
 
-test('step 8 disables resend interval for 2925 mailbox polling', async () => {
+test('step 8 uses a fixed 10-minute lookback window and disables resend interval for 2925 mailbox polling', async () => {
   let capturedOptions = null;
+  const realDateNow = Date.now;
+  Date.now = () => 900000;
 
   const executor = api.createStep8Executor({
     addLog: async () => {},
@@ -130,12 +132,17 @@ test('step 8 disables resend interval for 2925 mailbox polling', async () => {
     throwIfStopped: () => {},
   });
 
-  await executor.executeStep8({
-    email: 'user@example.com',
-    password: 'secret',
-    oauthUrl: 'https://oauth.example/latest',
-  });
+  try {
+    await executor.executeStep8({
+      email: 'user@example.com',
+      password: 'secret',
+      oauthUrl: 'https://oauth.example/latest',
+    });
+  } finally {
+    Date.now = realDateNow;
+  }
 
+  assert.equal(capturedOptions.filterAfterTimestamp, 300000);
   assert.equal(capturedOptions.resendIntervalMs, 0);
   assert.equal(capturedOptions.targetEmail, '');
   assert.equal(capturedOptions.beforeSubmit, undefined);
diff --git a/tests/contribution-content-update-service.test.js b/tests/contribution-content-update-service.test.js
new file mode 100644
index 0000000..65bf266
--- /dev/null
+++ b/tests/contribution-content-update-service.test.js
@@ -0,0 +1,161 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+
+const source = fs.readFileSync('sidepanel/contribution-content-update-service.js', 'utf8');
+
+function createContributionContentService(options = {}) {
+  const cache = new Map();
+  const windowObject = {};
+  let fetchCalls = 0;
+
+  const localStorage = {
+    getItem(key) {
+      return cache.has(key) ? cache.get(key) : null;
+    },
+    setItem(key, value) {
+      cache.set(key, String(value));
+    },
+    removeItem(key) {
+      cache.delete(key);
+    },
+  };
+
+  if (options.cachedSnapshot) {
+    cache.set(
+      'multipage-contribution-content-summary-v1',
+      JSON.stringify(options.cachedSnapshot)
+    );
+  }
+
+  const fetchImpl = options.fetchImpl || (async () => ({
+    ok: true,
+    async json() {
+      return {
+        ok: true,
+        items: [],
+        prompt_version: '',
+        has_visible_updates: false,
+        latest_updated_at: '',
+        latest_updated_at_display: '',
+      };
+    },
+  }));
+
+  const wrappedFetch = async (...args) => {
+    fetchCalls += 1;
+    return fetchImpl(...args);
+  };
+
+  const api = new Function(
+    'window',
+    'localStorage',
+    'fetch',
+    'AbortController',
+    'setTimeout',
+    'clearTimeout',
+    `${source}; return window.SidepanelContributionContentService;`
+  )(
+    windowObject,
+    localStorage,
+    wrappedFetch,
+    AbortController,
+    setTimeout,
+    clearTimeout
+  );
+
+  return {
+    api,
+    getFetchCalls() {
+      return fetchCalls;
+    },
+  };
+}
+
+test('getContentUpdateSnapshot returns a prompt version for visible contribution content updates', async () => {
+  const { api } = createContributionContentService({
+    fetchImpl: async () => ({
+      ok: true,
+      async json() {
+        return {
+          ok: true,
+          prompt_version: 'announcement:2026-04-21T12:00:00Z|tutorial:2026-04-21T12:05:00Z',
+          has_visible_updates: true,
+          latest_updated_at: '2026-04-21T12:05:00Z',
+          latest_updated_at_display: '2026-04-21 20:05',
+          items: [
+            {
+              slug: 'announcement',
+              title: '最新公告',
+              is_enabled: true,
+              has_content: true,
+              is_visible: true,
+              updated_at: '2026-04-21T12:00:00Z',
+              updated_at_display: '2026-04-21 20:00',
+            },
+            {
+              slug: 'tutorial',
+              title: '使用教程',
+              is_enabled: true,
+              has_content: true,
+              is_visible: true,
+              updated_at: '2026-04-21T12:05:00Z',
+              updated_at_display: '2026-04-21 20:05',
+            },
+          ],
+        };
+      },
+    }),
+  });
+
+  const snapshot = await api.getContentUpdateSnapshot();
+
+  assert.equal(snapshot.status, 'update-available');
+  assert.equal(snapshot.promptVersion, 'announcement:2026-04-21T12:00:00Z|tutorial:2026-04-21T12:05:00Z');
+  assert.equal(snapshot.hasVisibleUpdates, true);
+  assert.equal(snapshot.latestUpdatedAt, '2026-04-21T12:05:00Z');
+  assert.equal(snapshot.items.length, 2);
+  assert.deepEqual(
+    snapshot.items.map((item) => [item.slug, item.isVisible]),
+    [['announcement', true], ['tutorial', true]]
+  );
+});
+
+test('getContentUpdateSnapshot falls back to cached snapshot when the live request fails', async () => {
+  const cachedSnapshot = {
+    status: 'update-available',
+    promptVersion: 'announcement:2026-04-20T00:00:00Z',
+    hasVisibleUpdates: true,
+    latestUpdatedAt: '2026-04-20T00:00:00Z',
+    latestUpdatedAtDisplay: '2026-04-20 08:00',
+    items: [
+      {
+        slug: 'announcement',
+        title: '站点公告',
+        isEnabled: true,
+        hasContent: true,
+        isVisible: true,
+        updatedAt: '2026-04-20T00:00:00Z',
+        updatedAtDisplay: '2026-04-20 08:00',
+      },
+    ],
+    portalUrl: 'https://apikey.qzz.io',
+    apiUrl: 'https://apikey.qzz.io/api/content-summary',
+    checkedAt: Date.now() - 1000,
+  };
+
+  const { api, getFetchCalls } = createContributionContentService({
+    cachedSnapshot,
+    fetchImpl: async () => {
+      throw new Error('offline');
+    },
+  });
+
+  const snapshot = await api.getContentUpdateSnapshot();
+
+  assert.equal(getFetchCalls(), 1);
+  assert.equal(snapshot.fromCache, true);
+  assert.equal(snapshot.promptVersion, cachedSnapshot.promptVersion);
+  assert.equal(snapshot.errorMessage, 'offline');
+  assert.equal(snapshot.items[0].slug, 'announcement');
+});
diff --git a/tests/mail-2925-content.test.js b/tests/mail-2925-content.test.js
index 098fab8..09730be 100644
--- a/tests/mail-2925-content.test.js
+++ b/tests/mail-2925-content.test.js
@@ -56,7 +56,10 @@ function extractFunction(name) {
 }
 
 test('handlePollEmail establishes a baseline after opening from detail view and only picks mail from a later refresh', async () => {
-  const bundle = extractFunction('handlePollEmail');
+  const bundle = [
+    extractFunction('normalizeMinuteTimestamp'),
+    extractFunction('handlePollEmail'),
+  ].join('\n');
 
   const api = new Function(`
 let state = 'detail';
@@ -162,7 +165,10 @@ return {
 });
 
 test('handlePollEmail ignores targetEmail and still tests any matching ChatGPT mail', async () => {
-  const bundle = extractFunction('handlePollEmail');
+  const bundle = [
+    extractFunction('normalizeMinuteTimestamp'),
+    extractFunction('handlePollEmail'),
+  ].join('\n');
 
   const api = new Function(`
 let state = 'empty';
@@ -242,6 +248,94 @@ return {
   assert.deepEqual(api.getReadAndDeleteCalls(), ['mail-1']);
 });
 
+test('handlePollEmail only accepts 2925 mails inside the fixed lookback window', async () => {
+  const bundle = [
+    extractFunction('normalizeMinuteTimestamp'),
+    extractFunction('handlePollEmail'),
+  ].join('\n');
+
+  const api = new Function(`
+let state = 'ready';
+const seenCodes = new Set();
+const readAndDeleteCalls = [];
+const oldMail = {
+  id: 'mail-old',
+  text: 'OpenAI verification code 111111',
+  timestamp: 1000,
+};
+const windowMail = {
+  id: 'mail-window',
+  text: 'OpenAI verification code 222222',
+  timestamp: 301000,
+};
+
+function findMailItems() {
+  return state === 'ready' ? [oldMail, windowMail] : [];
+}
+
+function getMailItemId(item) {
+  return item.id;
+}
+
+function getCurrentMailIds(items = []) {
+  return new Set(items.map((item) => item.id));
+}
+
+function parseMailItemTimestamp(item) {
+  return item.timestamp;
+}
+
+function matchesMailFilters(text) {
+  return /openai|verification/i.test(String(text || ''));
+}
+
+function getMailItemText(item) {
+  return item.text;
+}
+
+function extractVerificationCode(text) {
+  const match = String(text || '').match(/(\\d{6})/);
+  return match ? match[1] : null;
+}
+
+async function sleep() {}
+async function sleepRandom() {}
+async function returnToInbox() {
+  return true;
+}
+async function refreshInbox() {}
+
+async function openMailAndDeleteAfterRead(item) {
+  readAndDeleteCalls.push(item.id);
+  return item.text;
+}
+
+async function ensureSeenCodesSession() {}
+function persistSeenCodes() {}
+function log() {}
+
+${bundle}
+
+return {
+  handlePollEmail,
+  getReadAndDeleteCalls() {
+    return readAndDeleteCalls.slice();
+  },
+};
+`)();
+
+  const result = await api.handlePollEmail(4, {
+    senderFilters: ['openai'],
+    subjectFilters: ['verification'],
+    maxAttempts: 1,
+    intervalMs: 1,
+    filterAfterTimestamp: 120000,
+  });
+
+  assert.equal(result.code, '222222');
+  assert.deepEqual(api.getReadAndDeleteCalls(), ['mail-window']);
+});
+
 test('ensureSeenCodesSession resets tried codes only when a new verification step session starts', async () => {
   const bundle = [
     extractFunction('buildSeenCodeSessionKey'),
diff --git a/tests/sidepanel-auto-run-content-refresh.test.js b/tests/sidepanel-auto-run-content-refresh.test.js
new file mode 100644
index 0000000..d9af2df
--- /dev/null
+++ b/tests/sidepanel-auto-run-content-refresh.test.js
@@ -0,0 +1,131 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+
+const sidepanelSource = fs.readFileSync('sidepanel/sidepanel.js', 'utf8');
+
+function extractFunction(name) {
+  const markers = [`async function ${name}(`, `function ${name}(`];
+  const start = markers
+    .map((marker) => sidepanelSource.indexOf(marker))
+    .find((index) => index >= 0);
+  if (start < 0) {
+    throw new Error(`missing function ${name}`);
+  }
+
+  let parenDepth = 0;
+  let signatureEnded = false;
+  let braceStart = -1;
+  for (let i = start; i < sidepanelSource.length; i += 1) {
+    const ch = sidepanelSource[i];
+    if (ch === '(') {
+      parenDepth += 1;
+    } else if (ch === ')') {
+      parenDepth -= 1;
+      if (parenDepth === 0) {
+        signatureEnded = true;
+      }
+    } else if (ch === '{' && signatureEnded) {
+      braceStart = i;
+      break;
+    }
+  }
+
+  let depth = 0;
+  let end = braceStart;
+  for (; end < sidepanelSource.length; end += 1) {
+    const ch = sidepanelSource[end];
+    if (ch === '{') depth += 1;
+    if (ch === '}') {
+      depth -= 1;
+      if (depth === 0) {
+        end += 1;
+        break;
+      }
+    }
+  }
+
+  return sidepanelSource.slice(start, end);
+}
+
+function createApi({ refreshImpl } = {}) {
+  const bundle = extractFunction('startAutoRunFromCurrentSettings');
+
+  return new Function(`
+const events = [];
+const latestState = { contributionMode: false };
+const inputAutoSkipFailures = { checked: false };
+const inputContributionNickname = { value: 'tester' };
+const inputContributionQq = { value: '123456' };
+const inputAutoSkipFailuresThreadIntervalMinutes = { value: '5' };
+const inputAutoDelayEnabled = { checked: false };
+const inputAutoDelayMinutes = { value: '30' };
+const btnAutoRun = { disabled: false, innerHTML: '' };
+const inputRunCount = { disabled: false };
+const chrome = {
+  runtime: {
+    async sendMessage(message) {
+      events.push({ type: 'send', message });
+      return { ok: true };
+    },
+  },
+};
+const console = {
+  warn(...args) {
+    events.push({ type: 'warn', args });
+  },
+};
+function getRunCountValue() { return 3; }
+function normalizeAutoRunThreadIntervalMinutes(value) { return Number(value) || 0; }
+function shouldOfferAutoModeChoice() { return false; }
+async function openAutoStartChoiceDialog() { throw new Error('should not be called'); }
+function getFirstUnfinishedStep() { return 1; }
+function getRunningSteps() { return []; }
+function shouldWarnAutoRunFallbackRisk() { return false; }
+function isAutoRunFallbackRiskPromptDismissed() { return false; }
+async function openAutoRunFallbackRiskConfirmModal() { throw new Error('should not be called'); }
+function setAutoRunFallbackRiskPromptDismissed() {}
+function normalizeAutoDelayMinutes(value) { return Number(value) || 30; }
+async function refreshContributionContentHint() {
+  events.push({ type: 'refresh' });
+  ${refreshImpl ? 'return (' + refreshImpl + ')();' : 'return null;'}
+}
+${bundle}
+return {
+  startAutoRunFromCurrentSettings,
+  getEvents() {
+    return events;
+  },
+};
+`)();
+}
+
+test('startAutoRunFromCurrentSettings refreshes contribution content hint before starting auto run', async () => {
+  const api = createApi();
+
+  const result = await api.startAutoRunFromCurrentSettings();
+
+  assert.equal(result, true);
+  assert.deepEqual(
+    api.getEvents().map((entry) => entry.type),
+    ['refresh', 'send']
+  );
+  assert.equal(api.getEvents()[1].message.type, 'AUTO_RUN');
+});
+
+test('startAutoRunFromCurrentSettings continues auto run when contribution content refresh fails', async () => {
+  const api = createApi({
+    refreshImpl: 'async () => { throw new Error("refresh failed"); }',
+  });
+
+  const result = await api.startAutoRunFromCurrentSettings();
+  const events = api.getEvents();
+
+  assert.equal(result, true);
+  assert.deepEqual(
+    events.map((entry) => entry.type),
+    ['refresh', 'warn', 'send']
+  );
+  assert.match(String(events[1].args[0]), /Failed to refresh contribution content hint before auto run/);
+  assert.equal(events[2].message.type, 'AUTO_RUN');
+});
diff --git a/tests/sidepanel-contribution-button.test.js b/tests/sidepanel-contribution-button.test.js
index 3608d8d..552c183 100644
--- a/tests/sidepanel-contribution-button.test.js
+++ b/tests/sidepanel-contribution-button.test.js
@@ -5,10 +5,18 @@ const fs = require('node:fs');
 test('sidepanel html keeps a single contribution mode button in header', () => {
   const html = fs.readFileSync('sidepanel/sidepanel.html', 'utf8');
   const matches = html.match(/id="btn-contribution-mode"/g) || [];
+  const serviceIndex = html.indexOf('<script src="contribution-content-update-service.js"></script>');
+  const sidepanelIndex = html.indexOf('<script src="sidepanel.js"></script>');
 
   assert.equal(matches.length, 1);
   assert.match(html, /id="btn-contribution-mode"[^>]*title="进入贡献模式并打开上传页"/);
   assert.match(html, />贡献\/使用<\/button>/);
+  assert.match(html, /id="contribution-update-hint"/);
+  assert.match(html, /id="contribution-update-hint-text"/);
+  assert.match(html, /id="btn-dismiss-contribution-update-hint"/);
+  assert.notEqual(serviceIndex, -1);
+  assert.notEqual(sidepanelIndex, -1);
+  assert.ok(serviceIndex < sidepanelIndex);
 });
 
 test('sidepanel source no longer keeps the legacy upload-page handler on the header contribution button', () => {
diff --git a/tests/verification-flow-polling.test.js b/tests/verification-flow-polling.test.js
index ee248eb..cf4a8fa 100644
--- a/tests/verification-flow-polling.test.js
+++ b/tests/verification-flow-polling.test.js
@@ -6,7 +6,7 @@ const source = fs.readFileSync('background/verification-flow.js', 'utf8');
 const globalScope = {};
 const api = new Function('self', `${source}; return self.MultiPageBackgroundVerificationFlow;`)(globalScope);
 
-test('verification flow extends 2925 polling window', () => {
+test('verification flow keeps 2925 polling cadence in the default payload', () => {
   const helpers = api.createVerificationFlowHelpers({
     addLog: async () => {},
     chrome: { tabs: { update: async () => {} } },
@@ -37,10 +37,8 @@ test('verification flow extends 2925 polling window', () => {
   const step4Payload = helpers.getVerificationPollPayload(4, { email: 'user@example.com', mailProvider: '2925' });
   const step8Payload = helpers.getVerificationPollPayload(8, { email: 'user@example.com', mailProvider: '2925' });
 
-  assert.equal(step4Payload.filterAfterTimestamp, 0);
   assert.equal(step4Payload.maxAttempts, 15);
   assert.equal(step4Payload.intervalMs, 15000);
-  assert.equal(step8Payload.filterAfterTimestamp, 0);
   assert.equal(step8Payload.maxAttempts, 15);
   assert.equal(step8Payload.intervalMs, 15000);
 });
@@ -111,7 +109,7 @@ test('verification flow runs beforeSubmit hook before filling the code', async (
   ]);
 });
 
-test('verification flow clears 2925 mailbox before polling and after successful login code submission', async () => {
+test('verification flow skips 2925 mailbox preclear when using a fixed login mail window and still clears after success', async () => {
   const mailMessages = [];
 
   const helpers = api.createVerificationFlowHelpers({
@@ -164,15 +162,15 @@ test('verification flow clears 2925 mailbox before polling and after successful
       lastLoginCode: null,
     },
     { provider: '2925', label: '2925 邮箱' },
-    {}
+    { filterAfterTimestamp: 123456 }
   );
 
   await new Promise((resolve) => setTimeout(resolve, 0));
 
-  assert.deepStrictEqual(mailMessages, ['DELETE_ALL_EMAILS', 'POLL_EMAIL', 'DELETE_ALL_EMAILS']);
+  assert.deepStrictEqual(mailMessages, ['POLL_EMAIL', 'DELETE_ALL_EMAILS']);
 });
 
-test('verification flow clears 2925 mailbox before polling and after successful signup code submission', async () => {
+test('verification flow skips 2925 mailbox preclear when using a fixed signup mail window and still clears after success', async () => {
   const mailMessages = [];
 
   const helpers = api.createVerificationFlowHelpers({
@@ -229,13 +227,14 @@ test('verification flow clears 2925 mailbox before polling and after successful
     },
     { provider: '2925', label: '2925 邮箱' },
     {
+      filterAfterTimestamp: 123456,
       requestFreshCodeFirst: false,
     }
   );
 
   await new Promise((resolve) => setTimeout(resolve, 0));
 
-  assert.deepStrictEqual(mailMessages, ['DELETE_ALL_EMAILS', 'POLL_EMAIL', 'DELETE_ALL_EMAILS']);
+  assert.deepStrictEqual(mailMessages, ['POLL_EMAIL', 'DELETE_ALL_EMAILS']);
 });
 
 test('verification flow completes step 8 and flags phone verification when add-phone appears after login code submit', async () => {
diff --git a/项目完整链路说明.md b/项目完整链路说明.md
index cbd413c..0b04547 100644
--- a/项目完整链路说明.md
+++ b/项目完整链路说明.md
@@ -28,7 +28,7 @@
 
 ### 2.1 Sidepanel
 
-[sidepanel/sidepanel.html](c:/Users/projectf/Downloads/codex注册扩展/sidepanel/sidepanel.html) + [sidepanel/sidepanel.js](c:/Users/projectf/Downloads/codex注册扩展/sidepanel/sidepanel.js) + [sidepanel/update-service.js](c:/Users/projectf/Downloads/codex注册扩展/sidepanel/update-service.js)
+[sidepanel/sidepanel.html](c:/Users/projectf/Downloads/codex注册扩展/sidepanel/sidepanel.html) + [sidepanel/sidepanel.js](c:/Users/projectf/Downloads/codex注册扩展/sidepanel/sidepanel.js) + [sidepanel/update-service.js](c:/Users/projectf/Downloads/codex注册扩展/sidepanel/update-service.js) + [sidepanel/contribution-content-update-service.js](c:/Users/projectf/Downloads/codex注册扩展/sidepanel/contribution-content-update-service.js)
 
 职责：
 
@@ -39,6 +39,8 @@
 - 动态渲染步骤列表
 - 管理顶部“贡献”按钮与贡献模式主面板；贡献模式本身是 sidepanel 的运行态 UI 模式，不是新的 `panelMode` 来源
 - 在贡献模式下复用同一套主自动流程启动，并在面板内展示贡献链路的 `OAUTH / 回调 / 总状态` 三块实时状态
+- 在顶部“贡献/使用”按钮下方展示一个非强制的内容更新轻提示；提示来源于 `apikey.qzz.io` 的公开公告 / 教程摘要，用户关闭后仅对当前 `promptVersion` 静默，下次内容版本变化后会重新出现
+- 在 sidepanel 初始化和点击“自动”按钮前刷新一次贡献站公开内容摘要；如果刷新失败，不阻塞主自动流程
 - 在日志区通过“记录”按钮打开独立的邮箱记录覆盖层，并展示成功/失败/停止/重试统计与分页列表
 - 查询 GitHub Releases 并展示更新卡片；当前更新服务会区分 `Pro` 与 legacy `v` 两个版本族，排序时优先保持版本族语义一致，同时会在读取缓存后重新排序，避免旧缓存把 `v` 版本误显示为比 `Pro` 更新
 
@@ -207,6 +209,26 @@
 - 安全边界仍然在服务端；扩展只负责公开 OAuth 贡献前端流程
 - 退出贡献模式后，要恢复普通模式 UI，并恢复持久配置中的自定义密码/本地同步偏好
 
+### 4.5 贡献内容更新提示链路
+
+这条链路用于把 `apikey.qzz.io` 上的公开公告 / 使用教程更新，映射成 sidepanel 顶部“贡献/使用”按钮下方的轻提示。
+
+1. 贡献站公开暴露 `GET https://apikey.qzz.io/api/content-summary`
+2. 接口返回 `announcement / tutorial` 两类内容的可见状态、更新时间，以及聚合后的 `promptVersion`
+3. `sidepanel/contribution-content-update-service.js` 负责拉取这个摘要，并在本地缓存最近一次可用结果
+4. `sidepanel.js` 在 sidepanel 初始化时会先拉一次摘要；如果当前 `promptVersion` 没被本地关闭过，就显示提示
+5. 用户点击提示右侧 `X` 后，只会把当前 `promptVersion` 记入 `localStorage`，不会永久关闭整个能力
+6. 当公告或教程再次更新，服务端返回新的 `promptVersion`，提示会重新出现
+7. 用户点击“自动”按钮时，sidepanel 会在真正启动自动流程前再刷新一次摘要，尽量让提示状态更及时
+8. 如果这次刷新失败，sidepanel 只记录警告并继续自动流程，不会因为提示链路故障阻塞主功能
+
+这条链路的关键边界是：
+
+- 它只消费公开摘要接口，不接触任何管理接口
+- 它只影响顶部轻提示，不改变贡献模式主状态机
+- 它使用 `localStorage` 做缓存和关闭版本记录，而不是写入 `chrome.storage.session/local`
+- 它是辅助提示链路，不允许反向阻塞自动运行
+
 ## 5. 内容脚本通信链路
 
 ### 5.1 READY 机制
@@ -620,3 +642,8 @@
 - Step 8 如果发现认证页已经进入登录超时报错/重试页，会直接报错并回到 Step 7 重新开始，而不是在 Step 8 内部点击 `重试`。
 - 任意认证页重试页如果正文中出现 `max_check_attempts`，会被视为 Cloudflare 风控触发：后台立刻完全停止流程，侧边栏会复用现有确认弹窗提示等待 15~30 分钟后再试，避免继续刷新或反复重试加重风控，确认按钮显示为“我知道了”。
 - Step 9 在点击 OAuth 同意页 `继续` 后，会额外检查是否进入认证页重试页；若命中则先通过共享恢复逻辑最多自动点击 5 次 `重试` 尝试恢复，再重新执行当前轮的 `继续` 点击。
+## 2026-04-21 2925 邮件时间窗补充
+
+- `2925` 在 Step 4 / Step 8 现在会携带固定的步骤开始时间窗口，实际筛选下限为“步骤开始时间向前回看 10 分钟”。
+- 为了保留这段固定时间窗内已经到达的验证码邮件，后台不再在轮询开始前预先清空 2925 邮箱。
+- `2925` 验证码最终提交成功后，后台仍会异步发送 `DELETE_ALL_EMAILS` 做收尾清理。
diff --git a/项目文件结构说明.md b/项目文件结构说明.md
index 4807e51..2d7eb8c 100644
--- a/项目文件结构说明.md
+++ b/项目文件结构说明.md
@@ -117,10 +117,11 @@
 - `sidepanel/luckmail-manager.js`：侧边栏 LuckMail 管理器，负责邮箱列表、筛选、启停、保留与批量操作。
 - `sidepanel/mail-2925-manager.js`：侧边栏 2925 账号池管理器，负责 2925 账号的新增、导入、切换、手动登录、启停、清冷却与删除。
 - `sidepanel/account-records-manager.js`：侧边栏邮箱记录面板管理器，负责“记录”按钮、覆盖层开关、分页列表、成功/失败/停止统计摘要和清理确认。
+- `sidepanel/contribution-content-update-service.js`：侧边栏贡献内容更新服务，负责拉取 `https://apikey.qzz.io/api/content-summary`、缓存公开公告/教程摘要，并输出可用于提示展示的 `promptVersion` 与最新更新时间。
 - `sidepanel/contribution-mode.js`：侧边栏贡献模式管理器，负责顶部“贡献”按钮、确认弹窗、贡献模式显隐、复用主自动流程启动、侧栏内贡献状态轮询、上传页跳转，以及贡献模式下对来源选择、配置入口、记录入口和敏感配置行的禁用与隐藏。
 - `sidepanel/sidepanel.css`：侧边栏样式文件。
-- `sidepanel/sidepanel.html`：侧边栏页面结构；当前步骤列表已改为动态容器，日志区提供“记录”按钮并挂接邮箱记录覆盖层，顶部新增“贡献”按钮并在设置卡片中新增贡献模式主面板；贡献面板内展示 `OAUTH / 回调 / 总状态` 三块真实运行态信息，同时把“本地同步”与“验证码重发”拆成独立行以避免特殊模式隐藏时互相影响；页面继续加载 `managed-alias-utils.js`，并把旧的“邮箱前缀”字段语义改为“别名基邮箱”；当 provider 为 2925 时，别名基邮箱行右侧会显示“号池”开关，开启后输入框切换为号池邮箱下拉选择，并显示 2925 账号池管理区。
-- `sidepanel/sidepanel.js`：侧边栏主入口脚本，负责 UI 状态同步、动态步骤渲染、按钮交互、独立本地同步配置、共享验证码自动重发次数配置与广播接收，并装配 Hotmail / 2925 / iCloud / LuckMail / 贡献模式 / 邮箱记录面板 manager；当前贡献模式的“开始贡献”会直接复用主自动流程启动逻辑，而独立 manager 负责贡献运行态展示与轮询，同时把 Gmail / 2925 的基邮箱输入、完整注册邮箱输入、自动生成按钮与兼容性校验统一接到共享别名逻辑上；当 2925 号池开关开启时，当前账号变化会同步映射到 2925 基邮箱下拉选择，关闭时则回退到原来的手填基邮箱路线。
+- `sidepanel/sidepanel.html`：侧边栏页面结构；当前步骤列表已改为动态容器，日志区提供“记录”按钮并挂接邮箱记录覆盖层，顶部新增“贡献”按钮并在设置卡片中新增贡献模式主面板；贡献按钮下方额外挂接一个可关闭的轻提示气泡，用于提示公开公告 / 使用教程有更新；贡献面板内展示 `OAUTH / 回调 / 总状态` 三块真实运行态信息，同时把“本地同步”与“验证码重发”拆成独立行以避免特殊模式隐藏时互相影响；页面继续加载 `managed-alias-utils.js`，并把旧的“邮箱前缀”字段语义改为“别名基邮箱”；当 provider 为 2925 时，别名基邮箱行右侧会显示“号池”开关，开启后输入框切换为号池邮箱下拉选择，并显示 2925 账号池管理区。
+- `sidepanel/sidepanel.js`：侧边栏主入口脚本，负责 UI 状态同步、动态步骤渲染、按钮交互、独立本地同步配置、共享验证码自动重发次数配置与广播接收，并装配 Hotmail / 2925 / iCloud / LuckMail / 贡献模式 / 邮箱记录面板 / 贡献内容更新服务；当前贡献模式的“开始贡献”会直接复用主自动流程启动逻辑，而独立 manager 负责贡献运行态展示与轮询，同时把 Gmail / 2925 的基邮箱输入、完整注册邮箱输入、自动生成按钮与兼容性校验统一接到共享别名逻辑上；当 2925 号池开关开启时，当前账号变化会同步映射到 2925 基邮箱下拉选择，关闭时则回退到原来的手填基邮箱路线；侧边栏初始化与点击“自动”前会刷新一次贡献站公开内容摘要，并按本地关闭版本决定是否展示轻提示。
 - `sidepanel/update-service.js`：侧边栏更新检查服务，负责 GitHub Releases 查询、`Pro` / `v` 双版本族排序、缓存读取与版本展示。
 
 ## `tests/`
@@ -171,9 +172,11 @@
 - `tests/managed-alias-utils.test.js`：覆盖 Gmail / 2925 共享别名工具的解析、生成、兼容性判断。
 - `tests/microsoft-email.test.js`：测试 Microsoft 邮件拉取与验证码提取逻辑。
 - `tests/sidepanel-hotmail-manager.test.js`：测试侧边栏 Hotmail 管理器模块接线与空态渲染。
-- `tests/sidepanel-contribution-button.test.js`：测试侧边栏顶部 `贡献` 按钮的 HTML 接线，以及直接打开账号贡献上传页的最小行为。
+- `tests/sidepanel-contribution-button.test.js`：测试侧边栏顶部 `贡献` 按钮的 HTML 接线、更新提示气泡接线，以及相关脚本加载顺序。
 - `tests/sidepanel-account-records-manager.test.js`：测试侧边栏邮箱记录覆盖层的 HTML 接入、helper 地址归一化与 manager 渲染逻辑。
+- `tests/contribution-content-update-service.test.js`：测试贡献内容更新服务对公开摘要接口的归一化、版本提取与失败回退缓存逻辑。
 - `tests/sidepanel-contribution-mode.test.js`：测试侧边栏贡献模式的 HTML 接线、runtime-only 设置保护，以及贡献模式 manager 复用主自动流启动、状态轮询和退出清理逻辑。
+- `tests/sidepanel-auto-run-content-refresh.test.js`：测试点击“自动”时会先刷新贡献内容更新摘要，且刷新失败不会阻塞自动流程启动。
 - `tests/sidepanel-icloud-manager.test.js`：测试侧边栏 iCloud 管理器模块接线与空态渲染。
 - `tests/sidepanel-icloud-provider.test.js`：测试侧边栏 iCloud 登录地址解析逻辑。
 - `tests/sidepanel-luckmail-manager.test.js`：测试侧边栏 LuckMail 管理器模块接线与空态渲染。