fix

browser-extension/deer-web-clipper/background.js

@@ -5,6 +5,9 @@ const LEGACY_LOCAL_API_BASE_URL = "http://localhost:8001";
 const LEGACY_LOCAL_WEB_BASE_URL = "http://localhost:5174";
 let pollTimer = null;
 let isPolling = false;
+let startupPromise = null;
+
+const POLLING_SCHEDULE_SETTING_KEYS = new Set(["taskPollingEnabled", "taskPollIntervalSeconds"]);
 
 function delay(ms) {
   return new Promise((resolve) => setTimeout(resolve, ms));
@@ -12,6 +15,14 @@ function delay(ms) {
 
 async function getSettings() {
   const settings = await chrome.storage.sync.get(DEER_CLIPPER_DEFAULTS);
+  const discovered = await chrome.storage.local.get({
+    discoveredApiBaseUrl: "",
+    discoveredWebBaseUrl: "",
+  });
+  if (settings.autoDiscoverServiceUrl) {
+    settings.apiBaseUrl = discovered.discoveredApiBaseUrl || settings.apiBaseUrl;
+    settings.webBaseUrl = discovered.discoveredWebBaseUrl || settings.webBaseUrl;
+  }
   const updates = {};
   if (!settings.apiBaseUrl || settings.apiBaseUrl === LEGACY_LOCAL_API_BASE_URL) {
     updates.apiBaseUrl = DEER_CLIPPER_DEFAULTS.apiBaseUrl;
@@ -69,10 +80,7 @@ function apiCandidatesForWebBase(webBase, currentApiBase) {
     }
   };
 
-  add(currentApiBase);
   add(webBase);
-  add(DEER_CLIPPER_DEFAULTS.apiBaseUrl);
-  add(LEGACY_LOCAL_API_BASE_URL);
 
   try {
     const url = new URL(normalizeServiceBase(webBase));
@@ -85,6 +93,10 @@ function apiCandidatesForWebBase(webBase, currentApiBase) {
     // Ignore invalid candidates.
   }
 
+  add(currentApiBase);
+  add(DEER_CLIPPER_DEFAULTS.apiBaseUrl);
+  add(LEGACY_LOCAL_API_BASE_URL);
+
   return candidates;
 }
 
@@ -93,6 +105,12 @@ async function browserContextStatus(apiBaseUrl) {
     const response = await fetch(`${apiBaseUrl}/api/browser-context/status`, {
       credentials: "include",
     });
+    // The gateway may enforce authentication globally before this otherwise
+    // public discovery endpoint is reached. A 401/403 still proves that this
+    // candidate is the zncm API paired with the open frontend tab.
+    if (response.status === 401 || response.status === 403) {
+      return { enabled: true, authenticationRequired: true };
+    }
     if (!response.ok) {
       return null;
     }
@@ -201,9 +219,12 @@ async function discoverServiceBases(settings, force = false) {
     settings.webBaseUrl !== next.webBaseUrl ||
     settings.lastServiceSyncSource !== next.lastServiceSyncSource
   ) {
-    await chrome.storage.sync.set({
-      apiBaseUrl: next.apiBaseUrl,
-      webBaseUrl: next.webBaseUrl,
+    // Discovered endpoints are runtime state, not user-authored preferences.
+    // Keep them in storage.local so Chrome sync write quotas cannot break task
+    // polling. The options page may still persist explicit user choices.
+    await chrome.storage.local.set({
+      discoveredApiBaseUrl: next.apiBaseUrl,
+      discoveredWebBaseUrl: next.webBaseUrl,
       lastServiceSyncAt: next.lastServiceSyncAt,
       lastServiceSyncSource: next.lastServiceSyncSource,
     });
@@ -826,19 +847,50 @@ async function pollOnce() {
   }
 }
 
-async function startup() {
+async function initializePolling() {
   let settings = await getSettings();
+  try {
     settings = await discoverServiceBases(settings);
+  } catch (error) {
+    // Service discovery persists diagnostic metadata in storage.sync. Chrome can
+    // temporarily reject those writes after its quota is reached; polling must
+    // still start with the last known settings.
+    console.warn("zncm service discovery failed during startup", error);
+  }
+  try {
     settings = await syncAuthToken(settings);
+  } catch (error) {
+    // A failed status/token write must not prevent alarms from being installed.
+    // pollOnce() will retry token synchronization before claiming each task.
+    console.warn("zncm token sync failed during startup", error);
+  }
   await refreshAlarm(settings);
   await scheduleNextPoll(1000);
 }
 
-chrome.runtime.onInstalled.addListener(() => void startup());
-chrome.runtime.onStartup.addListener(() => void startup());
+function startup() {
+  if (!startupPromise) {
+    startupPromise = initializePolling().finally(() => {
+      startupPromise = null;
+    });
+  }
+  return startupPromise;
+}
+
+async function restartPollingSchedule() {
+  const settings = await getSettings();
+  await refreshAlarm(settings);
+  await scheduleNextPoll(0);
+}
+
+chrome.runtime.onInstalled.addListener(() => void startup().catch((error) => console.warn("zncm startup failed", error)));
+chrome.runtime.onStartup.addListener(() => void startup().catch((error) => console.warn("zncm startup failed", error)));
 chrome.storage.onChanged.addListener((changes, areaName) => {
-  if (areaName === "sync") {
-    void startup();
+  if (
+    areaName === "sync" &&
+    Object.keys(changes || {}).some((key) => POLLING_SCHEDULE_SETTING_KEYS.has(key))
+  ) {
+    void restartPollingSchedule().catch((error) => console.warn("zncm polling reschedule failed", error));
   }
 });
 chrome.alarms.onAlarm.addListener((alarm) => {
@@ -902,4 +954,4 @@ chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
   return true;
 });
 
-void startup();
+void startup().catch((error) => console.warn("zncm startup failed", error));

browser-extension/deer-web-clipper/background.test.cjs

@@ -0,0 +1,130 @@
+const assert = require("node:assert/strict");
+const fs = require("node:fs");
+const path = require("node:path");
+const test = require("node:test");
+const vm = require("node:vm");
+
+const BACKGROUND_PATH = path.join(__dirname, "background.js");
+
+function createHarness() {
+  let storageChangedListener;
+  let alarmCreateCount = 0;
+  const settings = {
+    apiBaseUrl: "http://localhost:8001",
+    webBaseUrl: "http://localhost:5174",
+    autoDiscoverServiceUrl: false,
+    accessToken: "",
+    tokenSyncEnabled: false,
+    taskPollingEnabled: true,
+    workerId: "test-worker",
+    taskPollIntervalSeconds: 5,
+  };
+
+  const chrome = {
+    alarms: {
+      clear: async () => {},
+      create: async () => {
+        alarmCreateCount += 1;
+      },
+      onAlarm: { addListener: () => {} },
+    },
+    cookies: { get: async () => null },
+    runtime: {
+      onInstalled: { addListener: () => {} },
+      onMessage: { addListener: () => {} },
+      onStartup: { addListener: () => {} },
+    },
+    storage: {
+      local: {
+        get: async (defaults) => ({ ...defaults }),
+        set: async () => {},
+      },
+      session: { get: async () => ({ actSessions: {} }), set: async () => {} },
+      sync: {
+        get: async () => ({ ...settings }),
+        set: async (updates) => Object.assign(settings, updates),
+      },
+      onChanged: {
+        addListener: (listener) => {
+          storageChangedListener = listener;
+        },
+      },
+    },
+    tabs: { query: async () => [] },
+  };
+
+  const context = {
+    chrome,
+    console,
+    fetch: async () => {
+      throw new Error("offline test");
+    },
+    importScripts: () => {},
+    setTimeout: () => 1,
+    clearTimeout: () => {},
+    URL,
+    DEER_CLIPPER_DEFAULTS: settings,
+    deerNormalizeBaseUrl: (value) => String(value || "").replace(/\/+$/, ""),
+    deerMakeWorkerId: () => "test-worker",
+    deerAuthHeaders: () => ({}),
+    deerExtractAuthTokenFromPage: () => ({ token: "" }),
+  };
+  context.globalThis = context;
+  vm.runInNewContext(fs.readFileSync(BACKGROUND_PATH, "utf8"), context, {
+    filename: BACKGROUND_PATH,
+  });
+
+  return {
+    emitStorageChange(changes) {
+      storageChangedListener(changes, "sync");
+    },
+    getAlarmCreateCount: () => alarmCreateCount,
+    resetAlarmCreateCount: () => {
+      alarmCreateCount = 0;
+    },
+    getApiCandidates: (webBase, currentApiBase) =>
+      vm.runInContext(`apiCandidatesForWebBase(${JSON.stringify(webBase)}, ${JSON.stringify(currentApiBase)})`, context),
+  };
+}
+
+const settle = () => new Promise((resolve) => setImmediate(resolve));
+
+test("self-written sync metadata does not restart browser task polling", async () => {
+  const harness = createHarness();
+  await settle();
+  harness.resetAlarmCreateCount();
+
+  harness.emitStorageChange({
+    lastTokenSyncAt: { oldValue: "before", newValue: "after" },
+  });
+  await settle();
+
+  assert.equal(harness.getAlarmCreateCount(), 0);
+});
+
+test("polling configuration changes restart browser task polling", async () => {
+  const harness = createHarness();
+  await settle();
+  harness.resetAlarmCreateCount();
+
+  harness.emitStorageChange({
+    taskPollingEnabled: { oldValue: false, newValue: true },
+  });
+  await settle();
+
+  assert.equal(harness.getAlarmCreateCount(), 1);
+});
+
+test("service discovery prefers the API paired with the open zncm tab", async () => {
+  const harness = createHarness();
+
+  assert.deepEqual(
+    Array.from(harness.getApiCandidates("http://localhost:5174", "http://47.94.209.59:2026")),
+    [
+      "http://localhost:5174",
+      "http://localhost:8001",
+      "http://47.94.209.59:2026",
+      "http://localhost:8001",
+    ].filter((value, index, values) => values.indexOf(value) === index),
+  );
+});

browser-extension/deer-web-clipper/content.js

@@ -7,6 +7,8 @@
   const HOST_ID = "zncm-page-assistant-host";
   const state = {
     enabled: true,
+    taskPollingEnabled: true,
+    webBaseUrl: "",
     open: false,
     busy: false,
     threadId: "",
@@ -709,20 +711,58 @@
   async function loadSettings() {
     const settings = await chrome.storage.sync.get(DEER_CLIPPER_DEFAULTS);
     state.enabled = Boolean(settings.pageAssistantEnabled);
+    state.taskPollingEnabled = Boolean(settings.taskPollingEnabled);
+    state.webBaseUrl = deerNormalizeBaseUrl(settings.webBaseUrl || DEER_CLIPPER_DEFAULTS.webBaseUrl);
     ensureWidget();
   }
 
   chrome.storage.onChanged.addListener((changes, areaName) => {
-    if (areaName !== "sync" || !changes.pageAssistantEnabled) {
+    if (areaName !== "sync") {
       return;
     }
+    if (changes.pageAssistantEnabled) {
       state.enabled = Boolean(changes.pageAssistantEnabled.newValue);
       ensureWidget();
       if (state.enabled) {
         setStatus("页面问答框已开启。");
       }
+    }
+    if (changes.taskPollingEnabled) {
+      state.taskPollingEnabled = Boolean(changes.taskPollingEnabled.newValue);
+    }
+    if (changes.webBaseUrl) {
+      state.webBaseUrl = deerNormalizeBaseUrl(changes.webBaseUrl.newValue || DEER_CLIPPER_DEFAULTS.webBaseUrl);
+    }
   });
 
+  function isZncmPage() {
+    const appPath = `${location.pathname}${location.hash}`.toLowerCase();
+    if (
+      appPath.includes("/page/workspace") ||
+      appPath.includes("/chats/") ||
+      appPath.includes("#/login")
+    ) {
+      return true;
+    }
+    try {
+      const configured = new URL(state.webBaseUrl);
+      return configured.origin === location.origin;
+    } catch {
+      return false;
+    }
+  }
+
+  // MV3 service workers may be suspended between their short polling timers,
+  // while chrome.alarms cannot reliably run more often than every 30 seconds.
+  // A visible zncm tab provides a cheap wake-up signal so browser_act requests
+  // are normally claimed within the backend/model timeout window.
+  setInterval(() => {
+    if (!state.taskPollingEnabled || !isZncmPage()) {
+      return;
+    }
+    chrome.runtime.sendMessage({ type: "zncm-poll-now" }).catch(() => {});
+  }, 3000);
+
   setInterval(() => {
     if (!state.enabled || !ui.pageTitle) {
       return;