From e4e3e6a735c1a1a485d87a979b80c1ebe5803b6f Mon Sep 17 00:00:00 2001
From: brother7 <7brother7@gmail.com>
Date: Tue, 11 Aug 2026 00:58:17 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8A=9F=E8=83=BD=EF=BC=9A=E5=A4=A7=E5=B1=8F?=
 =?UTF-8?q?=20APK=20=E5=8E=9F=E7=94=9F=E6=92=AD=E6=8A=A5=E5=8F=8A=E9=A1=B9?=
 =?UTF-8?q?=E7=9B=AE=E5=85=A5=E5=8F=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

具体项目页由 APK 原生轮询并播报三次，总览页不播报。总览项目卡片通过项目编码进入对应大屏。
---
 android/README.md                             |  18 +-
 android/app/build.gradle                      |   4 +-
 android/app/src/main/AndroidManifest.xml      |   6 +
 .../display/CallAnnouncementTracker.java      |  26 +++
 .../display/DisplayAnnouncementPoller.java    | 202 ++++++++++++++++++
 .../cn/nianxx/queue/display/MainActivity.java |  36 +++-
 .../queue/display/NavigationPolicy.java       |   9 +
 .../queue/display/QueueAnnouncement.java      |  23 ++
 .../display/QueueAnnouncementPlayer.java      | 152 +++++++++++++
 .../nianxx/queue/display/QueueCallText.java   |  43 ++++
 android/app/src/main/res/values/strings.xml   |   1 +
 .../display/CallAnnouncementTrackerTest.java  |  44 ++++
 .../queue/display/NavigationPolicyTest.java   |  10 +
 .../queue/display/QueueAnnouncementTest.java  |  27 +++
 .../queue/display/QueueCallTextTest.java      |  29 +++
 server/internal/httpapi/public.go             |   1 +
 server/internal/httpapi/public_test.go        |   4 +-
 web/src/components/ProjectScreenTile.tsx      |  29 ++-
 web/src/hooks/useSpeechAnnouncements.test.ts  |  43 ----
 web/src/hooks/useSpeechAnnouncements.ts       |  33 ---
 web/src/lib/format.ts                         |  22 --
 web/src/pages/AdminPage.tsx                   |  16 +-
 web/src/pages/DisplayPage.test.tsx            |  35 +--
 web/src/pages/DisplayPage.tsx                 |  23 +-
 .../pages/PublicDisplayCenterPage.test.tsx    |  57 ++---
 web/src/pages/PublicDisplayCenterPage.tsx     |  31 +--
 web/src/styles.css                            |  40 ++++
 27 files changed, 728 insertions(+), 236 deletions(-)
 create mode 100644 android/app/src/main/java/cn/nianxx/queue/display/CallAnnouncementTracker.java
 create mode 100644 android/app/src/main/java/cn/nianxx/queue/display/DisplayAnnouncementPoller.java
 create mode 100644 android/app/src/main/java/cn/nianxx/queue/display/QueueAnnouncement.java
 create mode 100644 android/app/src/main/java/cn/nianxx/queue/display/QueueAnnouncementPlayer.java
 create mode 100644 android/app/src/main/java/cn/nianxx/queue/display/QueueCallText.java
 create mode 100644 android/app/src/test/java/cn/nianxx/queue/display/CallAnnouncementTrackerTest.java
 create mode 100644 android/app/src/test/java/cn/nianxx/queue/display/QueueAnnouncementTest.java
 create mode 100644 android/app/src/test/java/cn/nianxx/queue/display/QueueCallTextTest.java
 delete mode 100644 web/src/hooks/useSpeechAnnouncements.test.ts
 delete mode 100644 web/src/hooks/useSpeechAnnouncements.ts

diff --git a/android/README.md b/android/README.md
index eeaccfd..1d0e163 100644
--- a/android/README.md
+++ b/android/README.md
@@ -2,19 +2,27 @@
 
 这是景区排队叫号系统的原生 Android 薄壳，只承载两个公开页面：
 
-- 项目列表：`https://queue.nianxx.cn/admin/display`
-- 单项目展示：`https://queue.nianxx.cn/display/{项目编码或公示 Token}`
+- 总览页面：`https://queue.nianxx.cn/admin/display`
+- 单项目页面：`https://queue.nianxx.cn/display/{项目编号或公示 Token}`
 
 ## 现场能力
 
 - 无浏览器地址栏的沉浸式展示，并保持屏幕常亮
+- 总览页面只展示项目状态，不进行语音播报
+- 单项目页面由 APK 每 3 秒读取公开快照接口，发现新叫号批次后调用系统中文 TTS
+- 每次叫号由 Android 原生层连续播报三次，并使用系统媒体音量通道
 - 接管项目卡的网页全屏请求，返回键退出全屏
-- 允许叫号音频无需额外手势播放
 - 支持上述两个 HTTPS 页面作为 Android 深链
 - 仅允许 `queue.nianxx.cn` 的公开公示路径，阻止后台、员工端、外域和明文 HTTP 导航
-- 网络或证书异常时显示原生重试页
+- 网络、证书或中文语音引擎异常时显示原生提示
 
-APK 仍依赖线上服务和 Android System WebView，不会把实时队列数据离线复制进安装包。
+APK 仍依赖线上服务和 Android System WebView，不会把实时队列数据离线复制进安装包。叫号检测和播报都由 APK 原生层负责，不依赖线上网页是否包含语音代码；普通浏览器访问单项目页面时不会播报。
+
+## 设备要求
+
+- 系统已安装并启用支持简体中文的文字转语音引擎
+- 设备媒体音量已打开
+- Android System WebView 可以访问 `https://queue.nianxx.cn`
 
 ## 构建
 
diff --git a/android/app/build.gradle b/android/app/build.gradle
index 7098563..6af8941 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -11,8 +11,8 @@ android {
         applicationId = "cn.nianxx.queue.display"
         minSdk = 23
         targetSdk = 36
-        versionCode = 1
-        versionName = "1.0.0"
+        versionCode = 4
+        versionName = "1.2.0"
     }
 
     buildTypes {
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index a6fab64..239727a 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -4,6 +4,12 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-feature android:name="android.hardware.touchscreen" android:required="false" />
 
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.TTS_SERVICE" />
+        </intent>
+    </queries>
+
     <application
         android:allowBackup="false"
         android:dataExtractionRules="@xml/data_extraction_rules"
diff --git a/android/app/src/main/java/cn/nianxx/queue/display/CallAnnouncementTracker.java b/android/app/src/main/java/cn/nianxx/queue/display/CallAnnouncementTracker.java
new file mode 100644
index 0000000..3bb12f6
--- /dev/null
+++ b/android/app/src/main/java/cn/nianxx/queue/display/CallAnnouncementTracker.java
@@ -0,0 +1,26 @@
+package cn.nianxx.queue.display;
+
+import java.util.Objects;
+
+final class CallAnnouncementTracker {
+    private boolean initialized;
+    private String lastCallKey;
+
+    String accept(String callKey, String announcement) {
+        if (!initialized) {
+            initialized = true;
+            lastCallKey = callKey;
+            return null;
+        }
+        if (Objects.equals(lastCallKey, callKey)) {
+            return null;
+        }
+        lastCallKey = callKey;
+        return callKey != null ? announcement : null;
+    }
+
+    void reset() {
+        initialized = false;
+        lastCallKey = null;
+    }
+}
diff --git a/android/app/src/main/java/cn/nianxx/queue/display/DisplayAnnouncementPoller.java b/android/app/src/main/java/cn/nianxx/queue/display/DisplayAnnouncementPoller.java
new file mode 100644
index 0000000..b503106
--- /dev/null
+++ b/android/app/src/main/java/cn/nianxx/queue/display/DisplayAnnouncementPoller.java
@@ -0,0 +1,202 @@
+package cn.nianxx.queue.display;
+
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Log;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+
+final class DisplayAnnouncementPoller {
+    interface Listener {
+        void onAnnouncement(String text);
+    }
+
+    private static final String TAG = "XQKQueueDisplay";
+    private static final long POLL_INTERVAL_SECONDS = 3;
+    private static final int NETWORK_TIMEOUT_MILLIS = 5_000;
+
+    private final Listener listener;
+    private final Handler mainHandler = new Handler(Looper.getMainLooper());
+    private final ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor(
+            runnable -> new Thread(runnable, "queue-announcement-poller"));
+    private final CallAnnouncementTracker tracker = new CallAnnouncementTracker();
+    private ScheduledFuture<?> pollingTask;
+    private String activeSnapshotUrl;
+    private long generation;
+    private boolean closed;
+    private boolean initialSnapshotLogged;
+
+    DisplayAnnouncementPoller(Listener listener) {
+        this.listener = listener;
+    }
+
+    synchronized void start(String snapshotUrl) {
+        if (closed || snapshotUrl == null) {
+            return;
+        }
+        if (Objects.equals(activeSnapshotUrl, snapshotUrl)
+                && pollingTask != null
+                && !pollingTask.isCancelled()) {
+            return;
+        }
+        stopLocked();
+        activeSnapshotUrl = snapshotUrl;
+        tracker.reset();
+        long taskGeneration = ++generation;
+        pollingTask = executor.scheduleWithFixedDelay(
+                () -> poll(snapshotUrl, taskGeneration),
+                0,
+                POLL_INTERVAL_SECONDS,
+                TimeUnit.SECONDS);
+        Log.i(TAG, "Project announcement polling started");
+    }
+
+    synchronized void stop() {
+        stopLocked();
+    }
+
+    synchronized void close() {
+        if (closed) {
+            return;
+        }
+        closed = true;
+        stopLocked();
+        executor.shutdownNow();
+        mainHandler.removeCallbacksAndMessages(null);
+    }
+
+    private void poll(String snapshotUrl, long taskGeneration) {
+        try {
+            CallSnapshot snapshot = fetchSnapshot(snapshotUrl);
+            String announcement;
+            boolean firstSnapshot;
+            synchronized (this) {
+                if (!isActive(snapshotUrl, taskGeneration)) {
+                    return;
+                }
+                firstSnapshot = !initialSnapshotLogged;
+                initialSnapshotLogged = true;
+                announcement = tracker.accept(snapshot.callKey, snapshot.announcement);
+            }
+            if (firstSnapshot) {
+                Log.i(TAG, "Initial project snapshot received; current call present="
+                        + (snapshot.callKey != null));
+            }
+            if (announcement == null) {
+                return;
+            }
+            mainHandler.post(() -> {
+                synchronized (DisplayAnnouncementPoller.this) {
+                    if (!isActive(snapshotUrl, taskGeneration)) {
+                        return;
+                    }
+                }
+                Log.i(TAG, "New call batch detected; sending announcement to Android TTS");
+                listener.onAnnouncement(announcement);
+            });
+        } catch (Exception error) {
+            synchronized (this) {
+                if (!isActive(snapshotUrl, taskGeneration)) {
+                    return;
+                }
+            }
+            Log.w(TAG, "Snapshot polling failed: " + error.getClass().getSimpleName());
+        }
+    }
+
+    private synchronized boolean isActive(String snapshotUrl, long taskGeneration) {
+        return !closed
+                && generation == taskGeneration
+                && Objects.equals(activeSnapshotUrl, snapshotUrl);
+    }
+
+    private void stopLocked() {
+        generation += 1;
+        activeSnapshotUrl = null;
+        initialSnapshotLogged = false;
+        tracker.reset();
+        if (pollingTask != null) {
+            pollingTask.cancel(true);
+            pollingTask = null;
+        }
+    }
+
+    private static CallSnapshot fetchSnapshot(String snapshotUrl) throws IOException, JSONException {
+        HttpURLConnection connection = (HttpURLConnection) new URL(snapshotUrl).openConnection();
+        try {
+            connection.setConnectTimeout(NETWORK_TIMEOUT_MILLIS);
+            connection.setReadTimeout(NETWORK_TIMEOUT_MILLIS);
+            connection.setRequestMethod("GET");
+            connection.setRequestProperty("Accept", "application/json");
+            connection.setRequestProperty("User-Agent", "XQKQueueDisplay/1.2");
+            connection.setUseCaches(false);
+            int status = connection.getResponseCode();
+            if (status != HttpURLConnection.HTTP_OK) {
+                throw new IOException("Unexpected HTTP status " + status);
+            }
+            StringBuilder body = new StringBuilder();
+            try (BufferedReader reader = new BufferedReader(new InputStreamReader(
+                    connection.getInputStream(), StandardCharsets.UTF_8))) {
+                String line;
+                while ((line = reader.readLine()) != null) {
+                    body.append(line);
+                }
+            }
+            return parseSnapshot(body.toString());
+        } finally {
+            connection.disconnect();
+        }
+    }
+
+    private static CallSnapshot parseSnapshot(String body) throws JSONException {
+        JSONObject batch = new JSONObject(body).optJSONObject("current_batch");
+        if (batch == null) {
+            return new CallSnapshot(null, null);
+        }
+        int batchNumber = batch.optInt("batch_number", batch.optInt("sequence", -1));
+        String calledAt = batch.optString("called_at", "").trim();
+        String callKey = batchNumber + ":" + calledAt;
+        JSONArray tickets = batch.optJSONArray("tickets");
+        List<String> numbers = new ArrayList<>();
+        if (tickets != null) {
+            for (int index = 0; index < tickets.length(); index += 1) {
+                JSONObject ticket = tickets.optJSONObject(index);
+                if (ticket == null) {
+                    continue;
+                }
+                String number = ticket.optString("display_number", "").trim();
+                if (number.isEmpty()) {
+                    number = ticket.optString("ticket_number", "").trim();
+                }
+                numbers.add(number);
+            }
+        }
+        return new CallSnapshot(callKey, QueueCallText.format(numbers));
+    }
+
+    private static final class CallSnapshot {
+        final String callKey;
+        final String announcement;
+
+        CallSnapshot(String callKey, String announcement) {
+            this.callKey = callKey;
+            this.announcement = announcement;
+        }
+    }
+}
diff --git a/android/app/src/main/java/cn/nianxx/queue/display/MainActivity.java b/android/app/src/main/java/cn/nianxx/queue/display/MainActivity.java
index 66e4405..6ca6318 100644
--- a/android/app/src/main/java/cn/nianxx/queue/display/MainActivity.java
+++ b/android/app/src/main/java/cn/nianxx/queue/display/MainActivity.java
@@ -34,6 +34,8 @@ import android.widget.Toast;
 public final class MainActivity extends Activity {
     private FrameLayout root;
     private WebView webView;
+    private QueueAnnouncementPlayer announcementPlayer;
+    private DisplayAnnouncementPoller announcementPoller;
     private ProgressBar progressBar;
     private LinearLayout errorView;
     private TextView errorDetail;
@@ -47,11 +49,20 @@ public final class MainActivity extends Activity {
         super.onCreate(savedInstanceState);
         configureWindow();
         buildContentView();
+        announcementPlayer = new QueueAnnouncementPlayer(
+                this,
+                () -> runOnUiThread(() -> Toast.makeText(
+                        this,
+                        R.string.speech_unavailable,
+                        Toast.LENGTH_LONG).show()));
+        announcementPoller = new DisplayAnnouncementPoller(announcementPlayer::announce);
         setContentView(root);
+        enterImmersiveMode();
         registerPredictiveBackCallback();
 
         String initialUrl = NavigationPolicy.initialUrlOrStart(getIntent().getDataString());
         lastAllowedUrl = initialUrl;
+        updateAnnouncementPolling();
         webView.loadUrl(initialUrl);
     }
 
@@ -60,6 +71,8 @@ public final class MainActivity extends Activity {
         super.onNewIntent(intent);
         setIntent(intent);
         String target = NavigationPolicy.initialUrlOrStart(intent.getDataString());
+        lastAllowedUrl = target;
+        updateAnnouncementPolling();
         exitWebFullscreen();
         if (!target.equals(webView.getUrl())) {
             webView.loadUrl(target);
@@ -71,10 +84,12 @@ public final class MainActivity extends Activity {
         super.onResume();
         webView.onResume();
         enterImmersiveMode();
+        updateAnnouncementPolling();
     }
 
     @Override
     protected void onPause() {
+        announcementPoller.stop();
         webView.onPause();
         super.onPause();
     }
@@ -104,6 +119,8 @@ public final class MainActivity extends Activity {
             return;
         }
         if (NavigationPolicy.isProjectDisplay(lastAllowedUrl)) {
+            lastAllowedUrl = NavigationPolicy.START_URL;
+            updateAnnouncementPolling();
             webView.loadUrl(NavigationPolicy.START_URL);
             return;
         }
@@ -120,6 +137,8 @@ public final class MainActivity extends Activity {
 
     @Override
     protected void onDestroy() {
+        announcementPoller.close();
+        announcementPlayer.shutdown();
         if (customView != null) {
             root.removeView(customView);
             customView = null;
@@ -139,7 +158,6 @@ public final class MainActivity extends Activity {
     private void configureWindow() {
         getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN
                 | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
-        enterImmersiveMode();
     }
 
     @SuppressWarnings("deprecation")
@@ -205,7 +223,7 @@ public final class MainActivity extends Activity {
         settings.setGeolocationEnabled(false);
         settings.setMixedContentMode(WebSettings.MIXED_CONTENT_NEVER_ALLOW);
         settings.setCacheMode(WebSettings.LOAD_DEFAULT);
-        settings.setUserAgentString(settings.getUserAgentString() + " XQKQueueDisplay/1.0");
+        settings.setUserAgentString(settings.getUserAgentString() + " XQKQueueDisplay/1.2.0");
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             settings.setSafeBrowsingEnabled(true);
         }
@@ -299,6 +317,15 @@ public final class MainActivity extends Activity {
         return Math.round(value * getResources().getDisplayMetrics().density);
     }
 
+    private void updateAnnouncementPolling() {
+        String snapshotUrl = NavigationPolicy.snapshotUrl(lastAllowedUrl);
+        if (snapshotUrl == null) {
+            announcementPoller.stop();
+        } else {
+            announcementPoller.start(snapshotUrl);
+        }
+    }
+
     private final class DisplayWebViewClient extends WebViewClient {
         @Override
         public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
@@ -326,12 +353,17 @@ public final class MainActivity extends Activity {
         public void onPageStarted(WebView view, String url, android.graphics.Bitmap favicon) {
             if (NavigationPolicy.isAllowed(url)) {
                 lastAllowedUrl = url;
+                updateAnnouncementPolling();
             }
             showLoading();
         }
 
         @Override
         public void onPageFinished(WebView view, String url) {
+            if (NavigationPolicy.isAllowed(url)) {
+                lastAllowedUrl = url;
+                updateAnnouncementPolling();
+            }
             progressBar.setVisibility(View.GONE);
             if (!mainFrameFailed) {
                 errorView.setVisibility(View.GONE);
diff --git a/android/app/src/main/java/cn/nianxx/queue/display/NavigationPolicy.java b/android/app/src/main/java/cn/nianxx/queue/display/NavigationPolicy.java
index 463dde0..2a4db2e 100644
--- a/android/app/src/main/java/cn/nianxx/queue/display/NavigationPolicy.java
+++ b/android/app/src/main/java/cn/nianxx/queue/display/NavigationPolicy.java
@@ -48,6 +48,15 @@ final class NavigationPolicy {
                 && uri.getRawPath().startsWith(DISPLAY_PREFIX);
     }
 
+    static String snapshotUrl(String candidate) {
+        URI uri = parse(candidate);
+        if (!isProjectDisplay(candidate) || uri == null) {
+            return null;
+        }
+        String identifier = uri.getRawPath().substring(DISPLAY_PREFIX.length());
+        return "https://" + HOST + "/api/display/" + identifier + "/snapshot";
+    }
+
     private static URI parse(String candidate) {
         if (candidate == null || candidate.isBlank()) {
             return null;
diff --git a/android/app/src/main/java/cn/nianxx/queue/display/QueueAnnouncement.java b/android/app/src/main/java/cn/nianxx/queue/display/QueueAnnouncement.java
new file mode 100644
index 0000000..163cfde
--- /dev/null
+++ b/android/app/src/main/java/cn/nianxx/queue/display/QueueAnnouncement.java
@@ -0,0 +1,23 @@
+package cn.nianxx.queue.display;
+
+import java.util.Collections;
+import java.util.List;
+
+final class QueueAnnouncement {
+    private static final int REPEAT_COUNT = 3;
+    private static final int MAX_TEXT_LENGTH = 200;
+
+    private QueueAnnouncement() {
+    }
+
+    static List<String> utterances(String value) {
+        if (value == null) {
+            return Collections.emptyList();
+        }
+        String text = value.trim();
+        if (text.isEmpty() || text.length() > MAX_TEXT_LENGTH) {
+            return Collections.emptyList();
+        }
+        return Collections.nCopies(REPEAT_COUNT, text);
+    }
+}
diff --git a/android/app/src/main/java/cn/nianxx/queue/display/QueueAnnouncementPlayer.java b/android/app/src/main/java/cn/nianxx/queue/display/QueueAnnouncementPlayer.java
new file mode 100644
index 0000000..d055e52
--- /dev/null
+++ b/android/app/src/main/java/cn/nianxx/queue/display/QueueAnnouncementPlayer.java
@@ -0,0 +1,152 @@
+package cn.nianxx.queue.display;
+
+import android.content.Context;
+import android.media.AudioAttributes;
+import android.media.AudioManager;
+import android.speech.tts.TextToSpeech;
+import android.speech.tts.UtteranceProgressListener;
+import android.util.Log;
+
+import java.util.List;
+import java.util.Locale;
+
+final class QueueAnnouncementPlayer {
+    private static final String TAG = "XQKQueueDisplay";
+
+    interface Listener {
+        void onSpeechUnavailable();
+    }
+
+    private final Context context;
+    private final Listener listener;
+    private TextToSpeech engine;
+    private boolean ready;
+    private String pendingText;
+    private long utteranceSequence;
+
+    QueueAnnouncementPlayer(Context context, Listener listener) {
+        this.context = context.getApplicationContext();
+        this.listener = listener;
+    }
+
+    void announce(String value) {
+        List<String> utterances = QueueAnnouncement.utterances(value);
+        if (utterances.isEmpty()) {
+            return;
+        }
+        String text = utterances.get(0);
+        if (ready) {
+            speakNow(text);
+            return;
+        }
+        pendingText = text;
+        if (engine == null) {
+            Log.i(TAG, "Initializing Android TTS");
+            engine = new TextToSpeech(context, this::onInitialized);
+        }
+    }
+
+    void shutdown() {
+        pendingText = null;
+        ready = false;
+        if (engine == null) {
+            return;
+        }
+        engine.stop();
+        engine.shutdown();
+        engine = null;
+    }
+
+    private void onInitialized(int status) {
+        TextToSpeech currentEngine = engine;
+        if (currentEngine == null) {
+            return;
+        }
+        if (status != TextToSpeech.SUCCESS) {
+            fail("initialization failed with status " + status);
+            return;
+        }
+        int language = currentEngine.setLanguage(Locale.SIMPLIFIED_CHINESE);
+        if (language == TextToSpeech.LANG_MISSING_DATA
+                || language == TextToSpeech.LANG_NOT_SUPPORTED) {
+            fail("Simplified Chinese is unavailable with status " + language);
+            return;
+        }
+        currentEngine.setSpeechRate(0.9f);
+        currentEngine.setAudioAttributes(new AudioAttributes.Builder()
+                .setUsage(AudioAttributes.USAGE_MEDIA)
+                .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
+                .build());
+        currentEngine.setOnUtteranceProgressListener(new UtteranceProgressListener() {
+            @Override
+            public void onStart(String utteranceId) {
+                Log.i(TAG, "TTS utterance started");
+            }
+
+            @Override
+            public void onDone(String utteranceId) {
+                Log.i(TAG, "TTS utterance completed");
+            }
+
+            @Override
+            public void onError(String utteranceId) {
+                Log.e(TAG, "TTS utterance failed");
+            }
+
+            @Override
+            public void onError(String utteranceId, int errorCode) {
+                Log.e(TAG, "TTS utterance failed with code " + errorCode);
+            }
+        });
+        ready = true;
+        Log.i(TAG, "Android TTS ready for Simplified Chinese");
+        AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
+        if (audioManager != null) {
+            Log.i(TAG, "Media volume is "
+                    + audioManager.getStreamVolume(AudioManager.STREAM_MUSIC)
+                    + " of "
+                    + audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC));
+        }
+        String text = pendingText;
+        pendingText = null;
+        if (text != null) {
+            speakNow(text);
+        }
+    }
+
+    private void speakNow(String text) {
+        TextToSpeech currentEngine = engine;
+        if (!ready || currentEngine == null) {
+            return;
+        }
+        currentEngine.stop();
+        List<String> utterances = QueueAnnouncement.utterances(text);
+        int acceptedCount = 0;
+        for (String utterance : utterances) {
+            String utteranceId = "queue-call-" + (++utteranceSequence);
+            if (currentEngine.speak(
+                    utterance,
+                    TextToSpeech.QUEUE_ADD,
+                    null,
+                    utteranceId) == TextToSpeech.SUCCESS) {
+                acceptedCount += 1;
+            }
+        }
+        Log.i(TAG, "Queued " + acceptedCount + " of " + utterances.size() + " TTS utterances");
+        if (acceptedCount == 0) {
+            listener.onSpeechUnavailable();
+        }
+    }
+
+    private void fail(String reason) {
+        Log.e(TAG, "Android TTS unavailable: " + reason);
+        TextToSpeech failedEngine = engine;
+        engine = null;
+        ready = false;
+        pendingText = null;
+        if (failedEngine != null) {
+            failedEngine.shutdown();
+        }
+        listener.onSpeechUnavailable();
+    }
+}
diff --git a/android/app/src/main/java/cn/nianxx/queue/display/QueueCallText.java b/android/app/src/main/java/cn/nianxx/queue/display/QueueCallText.java
new file mode 100644
index 0000000..d63bffd
--- /dev/null
+++ b/android/app/src/main/java/cn/nianxx/queue/display/QueueCallText.java
@@ -0,0 +1,43 @@
+package cn.nianxx.queue.display;
+
+import java.util.ArrayList;
+import java.util.List;
+
+final class QueueCallText {
+    private static final String[] SPOKEN_DIGITS = {
+            "零", "一", "二", "三", "四", "五", "六", "七", "八", "九"
+    };
+
+    private QueueCallText() {
+    }
+
+    static String format(List<String> values) {
+        List<String> numbers = new ArrayList<>();
+        for (String value : values) {
+            if (value != null && !value.trim().isEmpty()) {
+                numbers.add(value.trim());
+            }
+        }
+        if (numbers.isEmpty()) {
+            return null;
+        }
+        String first = spokenNumber(numbers.get(0));
+        String calledNumbers = numbers.size() == 1
+                ? first + "号"
+                : first + "号至" + spokenNumber(numbers.get(numbers.size() - 1)) + "号";
+        return "请" + calledNumbers + "，前往入口。";
+    }
+
+    private static String spokenNumber(String value) {
+        StringBuilder spoken = new StringBuilder();
+        for (int index = 0; index < value.length(); index += 1) {
+            char character = value.charAt(index);
+            if (character >= '0' && character <= '9') {
+                spoken.append(SPOKEN_DIGITS[character - '0']);
+            } else {
+                spoken.append(character);
+            }
+        }
+        return spoken.toString();
+    }
+}
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
index 3510872..4dc3fd0 100644
--- a/android/app/src/main/res/values/strings.xml
+++ b/android/app/src/main/res/values/strings.xml
@@ -6,4 +6,5 @@
     <string name="retry">重新加载</string>
     <string name="blocked_navigation">已阻止离开公示页面</string>
     <string name="ssl_error">安全连接校验失败，请联系管理员</string>
+    <string name="speech_unavailable">未检测到可用的中文语音引擎，请在系统设置中启用中文文字转语音</string>
 </resources>
diff --git a/android/app/src/test/java/cn/nianxx/queue/display/CallAnnouncementTrackerTest.java b/android/app/src/test/java/cn/nianxx/queue/display/CallAnnouncementTrackerTest.java
new file mode 100644
index 0000000..4a47e42
--- /dev/null
+++ b/android/app/src/test/java/cn/nianxx/queue/display/CallAnnouncementTrackerTest.java
@@ -0,0 +1,44 @@
+package cn.nianxx.queue.display;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+import org.junit.Test;
+
+public final class CallAnnouncementTrackerTest {
+    @Test
+    public void establishesBaselineThenReturnsOnlyNewAnnouncements() {
+        CallAnnouncementTracker tracker = new CallAnnouncementTracker();
+
+        assertNull(tracker.accept("1:2026-08-11T00:00:00Z", "请零零零一号，前往入口。"));
+        assertNull(tracker.accept("1:2026-08-11T00:00:00Z", "请零零零一号，前往入口。"));
+        assertEquals(
+                "请零零零二号，前往入口。",
+                tracker.accept("2:2026-08-11T00:01:00Z", "请零零零二号，前往入口。"));
+    }
+
+    @Test
+    public void acceptsNextBatchAfterCurrentCallClears() {
+        CallAnnouncementTracker tracker = new CallAnnouncementTracker();
+
+        assertNull(tracker.accept(null, null));
+        assertEquals(
+                "请零零零一号，前往入口。",
+                tracker.accept("1:2026-08-11T00:00:00Z", "请零零零一号，前往入口。"));
+        assertNull(tracker.accept(null, null));
+        assertEquals(
+                "请零零零二号，前往入口。",
+                tracker.accept("2:2026-08-11T00:01:00Z", "请零零零二号，前往入口。"));
+    }
+
+    @Test
+    public void resetRequiresANewBaseline() {
+        CallAnnouncementTracker tracker = new CallAnnouncementTracker();
+        assertNull(tracker.accept("1:first", "first"));
+        assertEquals("second", tracker.accept("2:second", "second"));
+
+        tracker.reset();
+
+        assertNull(tracker.accept("3:third", "third"));
+    }
+}
diff --git a/android/app/src/test/java/cn/nianxx/queue/display/NavigationPolicyTest.java b/android/app/src/test/java/cn/nianxx/queue/display/NavigationPolicyTest.java
index 33a1ae4..193aac9 100644
--- a/android/app/src/test/java/cn/nianxx/queue/display/NavigationPolicyTest.java
+++ b/android/app/src/test/java/cn/nianxx/queue/display/NavigationPolicyTest.java
@@ -2,6 +2,7 @@ package cn.nianxx.queue.display;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
 import org.junit.Test;
@@ -47,4 +48,13 @@ public final class NavigationPolicyTest {
         assertTrue(NavigationPolicy.isProjectDisplay("https://queue.nianxx.cn/display/YYHHC"));
         assertFalse(NavigationPolicy.isProjectDisplay(NavigationPolicy.START_URL));
     }
+
+    @Test
+    public void createsSnapshotUrlOnlyForDirectProjectDisplays() {
+        assertEquals(
+                "https://queue.nianxx.cn/api/display/YYHHC/snapshot",
+                NavigationPolicy.snapshotUrl("https://queue.nianxx.cn/display/YYHHC"));
+        assertNull(NavigationPolicy.snapshotUrl(NavigationPolicy.START_URL));
+        assertNull(NavigationPolicy.snapshotUrl("https://example.com/display/YYHHC"));
+    }
 }
diff --git a/android/app/src/test/java/cn/nianxx/queue/display/QueueAnnouncementTest.java b/android/app/src/test/java/cn/nianxx/queue/display/QueueAnnouncementTest.java
new file mode 100644
index 0000000..b225d9f
--- /dev/null
+++ b/android/app/src/test/java/cn/nianxx/queue/display/QueueAnnouncementTest.java
@@ -0,0 +1,27 @@
+package cn.nianxx.queue.display;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+import java.util.List;
+
+public final class QueueAnnouncementTest {
+    @Test
+    public void repeatsValidAnnouncementThreeTimes() {
+        List<String> utterances = QueueAnnouncement.utterances("  请零零零一六号，前往入口。  ");
+
+        assertEquals(3, utterances.size());
+        assertEquals("请零零零一六号，前往入口。", utterances.get(0));
+        assertEquals(utterances.get(0), utterances.get(1));
+        assertEquals(utterances.get(0), utterances.get(2));
+    }
+
+    @Test
+    public void ignoresMissingOrUnreasonablyLongText() {
+        assertTrue(QueueAnnouncement.utterances(null).isEmpty());
+        assertTrue(QueueAnnouncement.utterances("   ").isEmpty());
+        assertTrue(QueueAnnouncement.utterances("1".repeat(201)).isEmpty());
+    }
+}
diff --git a/android/app/src/test/java/cn/nianxx/queue/display/QueueCallTextTest.java b/android/app/src/test/java/cn/nianxx/queue/display/QueueCallTextTest.java
new file mode 100644
index 0000000..6f38ebb
--- /dev/null
+++ b/android/app/src/test/java/cn/nianxx/queue/display/QueueCallTextTest.java
@@ -0,0 +1,29 @@
+package cn.nianxx.queue.display;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+import org.junit.Test;
+
+import java.util.List;
+
+public final class QueueCallTextTest {
+    @Test
+    public void formatsOneNumberDigitByDigit() {
+        assertEquals(
+                "请零零零一六号，前往入口。",
+                QueueCallText.format(List.of("00016")));
+    }
+
+    @Test
+    public void formatsMultipleNumbersAsRange() {
+        assertEquals(
+                "请零零零一六号至零零零一八号，前往入口。",
+                QueueCallText.format(List.of("00016", "00017", "00018")));
+    }
+
+    @Test
+    public void ignoresMissingNumbers() {
+        assertNull(QueueCallText.format(List.of("", "   ")));
+    }
+}
diff --git a/server/internal/httpapi/public.go b/server/internal/httpapi/public.go
index 2cf1836..da2a954 100644
--- a/server/internal/httpapi/public.go
+++ b/server/internal/httpapi/public.go
@@ -482,6 +482,7 @@ func newDisplayBatchDTO(batch model.CallBatch, tickets []displayTicketDTO) displ
 func publicDisplayProjectView(project map[string]any) map[string]any {
 	return map[string]any{
 		"id":                   project["id"],
+		"code":                 project["code"],
 		"name":                 project["name"],
 		"status":               project["status"],
 		"waiting_count":        project["waiting_count"],
diff --git a/server/internal/httpapi/public_test.go b/server/internal/httpapi/public_test.go
index 04bb391..35159bb 100644
--- a/server/internal/httpapi/public_test.go
+++ b/server/internal/httpapi/public_test.go
@@ -33,7 +33,7 @@ func TestDisplayBatchDTOCannotSerializePersonalFields(t *testing.T) {
 
 func TestPublicDisplayProjectViewOnlySerializesDisplayFields(t *testing.T) {
 	view := publicDisplayProjectView(map[string]any{
-		"id": "project-1", "name": "东门观光车", "status": model.ProjectRunning,
+		"id": "project-1", "code": "YYHHC", "name": "东门观光车", "status": model.ProjectRunning,
 		"waiting_count": 3, "waiting_ticket_count": 3, "waiting_people_count": 7,
 		"issued_ticket_count": 15, "latest_ticket_number": "00015", "experienced_people": 12,
 		"current_batch":  map[string]any{"tickets": []map[string]any{{"ticket_number": "00013"}}},
@@ -51,7 +51,7 @@ func TestPublicDisplayProjectViewOnlySerializesDisplayFields(t *testing.T) {
 			t.Fatalf("public display overview leaked forbidden field %q: %s", forbidden, encoded)
 		}
 	}
-	for _, required := range []string{`"name":"东门观光车"`, `"ticket_number":"00013"`, `"waiting_people_count":7`} {
+	for _, required := range []string{`"code":"YYHHC"`, `"name":"东门观光车"`, `"ticket_number":"00013"`, `"waiting_people_count":7`} {
 		if !strings.Contains(encoded, required) {
 			t.Fatalf("public display overview missing field %q: %s", required, encoded)
 		}
diff --git a/web/src/components/ProjectScreenTile.tsx b/web/src/components/ProjectScreenTile.tsx
index 52d1ce5..960b080 100644
--- a/web/src/components/ProjectScreenTile.tsx
+++ b/web/src/components/ProjectScreenTile.tsx
@@ -5,10 +5,11 @@ import type { AdminProjectDto, CallBatchDto } from "../types";
 interface ProjectScreenTileProps {
   project: AdminProjectDto;
   standalone?: boolean;
+  displayHref?: string;
   onFullscreen?: (projectId: string) => Promise<void>;
 }
 
-export function ProjectScreenTile({ project, standalone = false, onFullscreen }: ProjectScreenTileProps) {
+export function ProjectScreenTile({ project, standalone = false, displayHref, onFullscreen }: ProjectScreenTileProps) {
   const current = project.current_batch && typeof project.current_batch === "object"
     ? project.current_batch as CallBatchDto
     : null;
@@ -50,8 +51,9 @@ export function ProjectScreenTile({ project, standalone = false, onFullscreen }:
     hour12: false,
   }).format(now);
 
-  return (
-    <article className={`screen-tile${standalone ? " screen-tile--standalone" : ""}`} data-project-screen={project.id}>
+  const className = `screen-tile${standalone ? " screen-tile--standalone" : ""}${displayHref ? " screen-tile--link" : ""}`;
+  const content = (
+    <>
       <header className="screen-tile__header">
         <div className="screen-tile__clock" aria-label={`当前时间 ${dateLabel} ${timeLabel}`}>
           <img className="screen-tile__logo" src="/xiaoqikong-logo.jpg" alt="" aria-hidden="true" />
@@ -63,7 +65,9 @@ export function ProjectScreenTile({ project, standalone = false, onFullscreen }:
         <div className="screen-tile__project">
           <h2>{project.name}</h2>
         </div>
-        {!standalone && onFullscreen ? (
+        {displayHref ? (
+          <span className="button button--primary screen-tile__fullscreen" aria-hidden="true">进入项目大屏</span>
+        ) : !standalone && onFullscreen ? (
           <button className="button button--primary screen-tile__fullscreen" onClick={() => void onFullscreen(project.id)}>全屏展示</button>
         ) : null}
       </header>
@@ -83,6 +87,21 @@ export function ProjectScreenTile({ project, standalone = false, onFullscreen }:
           <ol>{visible.map((item) => <li key={item.range}><strong>{item.range}</strong><span>{item.wait}</span></li>)}</ol>
         ) : <p>后续区间暂不可估算</p>}
       </section>
-    </article>
+    </>
   );
+
+  if (displayHref) {
+    return (
+      <a
+        className={className}
+        href={displayHref}
+        aria-label={`进入${project.name}项目大屏`}
+        data-project-screen={project.id}
+      >
+        {content}
+      </a>
+    );
+  }
+
+  return <article className={className} data-project-screen={project.id}>{content}</article>;
 }
diff --git a/web/src/hooks/useSpeechAnnouncements.test.ts b/web/src/hooks/useSpeechAnnouncements.test.ts
deleted file mode 100644
index ce31a0f..0000000
--- a/web/src/hooks/useSpeechAnnouncements.test.ts
+++ /dev/null
@@ -1,43 +0,0 @@
-import { act, renderHook } from "@testing-library/react";
-import { afterEach, describe, expect, it, vi } from "vitest";
-import { useSpeechAnnouncements } from "./useSpeechAnnouncements";
-
-class SpeechSynthesisUtteranceMock {
-  lang = "";
-  rate = 1;
-
-  constructor(public text: string) {}
-}
-
-describe("useSpeechAnnouncements", () => {
-  afterEach(() => {
-    vi.restoreAllMocks();
-    vi.unstubAllGlobals();
-  });
-
-  it("把叫号文本用中文语音连续播报三次", () => {
-    const speak = vi.fn();
-    const cancel = vi.fn();
-    vi.stubGlobal("SpeechSynthesisUtterance", SpeechSynthesisUtteranceMock);
-    vi.stubGlobal("speechSynthesis", { speak, cancel, paused: false, resume: vi.fn() });
-    const { result } = renderHook(() => useSpeechAnnouncements());
-
-    act(() => result.current.announce(["请零零零一六号，前往入口。"]));
-
-    expect(cancel).toHaveBeenCalledOnce();
-    expect(speak).toHaveBeenCalledTimes(3);
-    for (const [utterance] of speak.mock.calls) {
-      expect(utterance).toMatchObject({
-        text: "请零零零一六号，前往入口。",
-        lang: "zh-CN",
-        rate: 0.9,
-      });
-    }
-  });
-
-  it("浏览器不支持语音合成时安全跳过", () => {
-    const { result } = renderHook(() => useSpeechAnnouncements());
-
-    expect(() => result.current.announce(["请一号，前往入口。"])).not.toThrow();
-  });
-});
diff --git a/web/src/hooks/useSpeechAnnouncements.ts b/web/src/hooks/useSpeechAnnouncements.ts
deleted file mode 100644
index 474eab9..0000000
--- a/web/src/hooks/useSpeechAnnouncements.ts
+++ /dev/null
@@ -1,33 +0,0 @@
-import { useCallback } from "react";
-
-const ANNOUNCEMENT_REPEAT_COUNT = 3;
-
-function speechSupported(): boolean {
-  return typeof window !== "undefined"
-    && typeof window.speechSynthesis?.speak === "function"
-    && typeof SpeechSynthesisUtterance !== "undefined";
-}
-
-function createUtterance(text: string): SpeechSynthesisUtterance {
-  const utterance = new SpeechSynthesisUtterance(text);
-  utterance.lang = "zh-CN";
-  utterance.rate = 0.9;
-  return utterance;
-}
-
-export function useSpeechAnnouncements() {
-  const announce = useCallback((announcements: string[]) => {
-    if (!speechSupported() || !announcements.length) return;
-
-    const synthesis = window.speechSynthesis;
-    synthesis.cancel();
-    if (synthesis.paused) synthesis.resume();
-    for (const announcement of announcements) {
-      for (let repeat = 0; repeat < ANNOUNCEMENT_REPEAT_COUNT; repeat += 1) {
-        synthesis.speak(createUtterance(announcement));
-      }
-    }
-  }, []);
-
-  return { announce };
-}
diff --git a/web/src/lib/format.ts b/web/src/lib/format.ts
index e671ce2..ec0a269 100644
--- a/web/src/lib/format.ts
+++ b/web/src/lib/format.ts
@@ -1,18 +1,6 @@
 import type { CallBatchDto, ProjectStatus, TicketStatus } from "../types";
 
 const numberFormatter = new Intl.NumberFormat("zh-CN");
-const SPOKEN_DIGITS: Record<string, string> = {
-  "0": "零",
-  "1": "一",
-  "2": "二",
-  "3": "三",
-  "4": "四",
-  "5": "五",
-  "6": "六",
-  "7": "七",
-  "8": "八",
-  "9": "九",
-};
 
 export function formatNumber(value: unknown, fallback = "暂无"): string {
   const number = typeof value === "number" ? value : Number(value);
@@ -119,16 +107,6 @@ export function formatTicketNumberRange(numbers: Array<string | null | undefined
   return `${valid[0]} 至 ${valid[valid.length - 1]}`;
 }
 
-export function formatCallAnnouncement(batch?: CallBatchDto | null): string | null {
-  const numbers = batch?.tickets.map((ticket) => ticket.ticket_number.trim()).filter(Boolean) ?? [];
-  if (!numbers.length) return null;
-  const spokenNumber = (number: string) => Array.from(number, (character) => SPOKEN_DIGITS[character] ?? character).join("");
-  const calledNumbers = numbers.length === 1
-    ? `${spokenNumber(numbers[0])}号`
-    : `${spokenNumber(numbers[0])}号至${spokenNumber(numbers[numbers.length - 1])}号`;
-  return `请${calledNumbers}，前往入口。`;
-}
-
 export function isTimestampStale(value?: string | null, thresholdMs = 30_000, now = Date.now()): boolean {
   if (!value) return true;
   const timestamp = new Date(value).getTime();
diff --git a/web/src/pages/AdminPage.tsx b/web/src/pages/AdminPage.tsx
index f2119df..0a88298 100644
--- a/web/src/pages/AdminPage.tsx
+++ b/web/src/pages/AdminPage.tsx
@@ -344,7 +344,12 @@ function ProjectMaintenance({ project, onRefresh }: { project?: AdminProjectDto;
   </div>;
 }
 
-export function DisplayCenter({ projects }: { projects: AdminProjectDto[] }) {
+interface DisplayCenterProps {
+  projects: AdminProjectDto[];
+  projectHref?: (project: AdminProjectDto) => string | undefined;
+}
+
+export function DisplayCenter({ projects, projectHref }: DisplayCenterProps) {
   const [fullscreenError, setFullscreenError] = useState(false);
   const enterFullscreen = async (projectId: string) => {
     const tile = document.querySelector(`[data-project-screen="${projectId}"]`);
@@ -365,7 +370,14 @@ export function DisplayCenter({ projects }: { projects: AdminProjectDto[] }) {
       {fullscreenError ? <FeedbackBanner tone="warning" title="浏览器未允许全屏">可继续在当前页面查看实时状态。</FeedbackBanner> : null}
       {projects.length ? (
         <section className="screen-wall" aria-label="项目实时监控墙">
-          {projects.map((project) => <ProjectScreenTile project={project} onFullscreen={enterFullscreen} key={project.id} />)}
+          {projects.map((project) => (
+            <ProjectScreenTile
+              project={project}
+              displayHref={projectHref?.(project)}
+              onFullscreen={projectHref ? undefined : enterFullscreen}
+              key={project.id}
+            />
+          ))}
         </section>
       ) : <EmptyState title="暂无可监控项目" />}
     </>
diff --git a/web/src/pages/DisplayPage.test.tsx b/web/src/pages/DisplayPage.test.tsx
index 539db6c..e2664c1 100644
--- a/web/src/pages/DisplayPage.test.tsx
+++ b/web/src/pages/DisplayPage.test.tsx
@@ -94,43 +94,12 @@ describe("DisplayPage", () => {
     ]);
   });
 
-  it("新批次出现时用前端中文语音连续播报三次叫号内容", () => {
-    const speak = vi.fn();
-    const cancel = vi.fn();
-    class SpeechSynthesisUtteranceMock {
-      lang = "";
-      rate = 1;
-
-      constructor(public text: string) {}
-    }
-    vi.stubGlobal("SpeechSynthesisUtterance", SpeechSynthesisUtteranceMock);
-    vi.stubGlobal("speechSynthesis", { speak, cancel, paused: false, resume: vi.fn() });
-    const { container, rerender } = render(<DisplayPage />);
+  it("网页端不包含叫号声音控件或音频播放器", () => {
+    const { container } = render(<DisplayPage />);
 
     expect(screen.queryByRole("button", { name: "开启叫号声音" })).not.toBeInTheDocument();
     expect(screen.queryByText("叫号声音已开启")).not.toBeInTheDocument();
     expect(container.querySelector("audio")).toBeNull();
 
-    pollingResource.data.current_batch = {
-      batch_number: 3,
-      status: "CALLED",
-      called_at: "2026-07-10T09:05:00Z",
-      tickets: [
-        { ticket_number: "00005", status: "CALLED", party_size: 2 },
-        { ticket_number: "00006", status: "CALLED", party_size: 1 },
-      ],
-    };
-    rerender(<DisplayPage />);
-    rerender(<DisplayPage />);
-
-    expect(cancel).toHaveBeenCalledOnce();
-    expect(speak).toHaveBeenCalledTimes(3);
-    for (const [utterance] of speak.mock.calls) {
-      expect(utterance).toMatchObject({
-        text: "请零零零零五号至零零零零六号，前往入口。",
-        lang: "zh-CN",
-        rate: 0.9,
-      });
-    }
   });
 });
diff --git a/web/src/pages/DisplayPage.tsx b/web/src/pages/DisplayPage.tsx
index d61b76e..2c26d44 100644
--- a/web/src/pages/DisplayPage.tsx
+++ b/web/src/pages/DisplayPage.tsx
@@ -1,17 +1,14 @@
-import { useEffect, useRef } from "react";
 import { useParams } from "react-router-dom";
 import { api } from "../api";
 import { ProjectScreenTile } from "../components/ProjectScreenTile";
 import { usePollingResource } from "../hooks/usePollingResource";
-import { useSpeechAnnouncements } from "../hooks/useSpeechAnnouncements";
-import { formatCallAnnouncement, formatDateTime, isTimestampStale } from "../lib/format";
+import { formatDateTime, isTimestampStale } from "../lib/format";
 import type { AdminProjectDto } from "../types";
 
 export { forecastRows } from "../lib/display";
 
 export function DisplayPage() {
   const { token = "" } = useParams();
-  const { announce } = useSpeechAnnouncements();
   const resource = usePollingResource((signal) => api.display(token, signal), {
     enabled: Boolean(token),
     intervalMs: 3_000,
@@ -20,24 +17,6 @@ export function DisplayPage() {
   const data = resource.data;
   const freshnessTime = resource.lastClientSuccessAt;
   const stale = Boolean(data) && isTimestampStale(freshnessTime, 15_000);
-  const current = data?.current_batch;
-  const currentCallKey = current ? `${current.batch_number}:${current.called_at ?? ""}` : null;
-  const currentAnnouncement = formatCallAnnouncement(current);
-  const hasSnapshot = Boolean(data);
-  const lastCallRef = useRef<{ token: string; key: string | null } | null>(null);
-  useEffect(() => {
-    if (!hasSnapshot) return;
-    const previous = lastCallRef.current;
-    lastCallRef.current = { token, key: currentCallKey };
-    if (
-      !previous
-      || previous.token !== token
-      || previous.key === currentCallKey
-      || !currentAnnouncement
-    ) return;
-
-    announce([currentAnnouncement]);
-  }, [announce, currentAnnouncement, currentCallKey, hasSnapshot, token]);
   if (resource.loading && !data) {
     return <main className="display-page display-page--state"><strong>正在连接叫号服务</strong></main>;
   }
diff --git a/web/src/pages/PublicDisplayCenterPage.test.tsx b/web/src/pages/PublicDisplayCenterPage.test.tsx
index 51ed480..5d383cb 100644
--- a/web/src/pages/PublicDisplayCenterPage.test.tsx
+++ b/web/src/pages/PublicDisplayCenterPage.test.tsx
@@ -7,6 +7,7 @@ const { displayOverview, pollingResource } = vi.hoisted(() => ({
     data: {
       projects: [{
         id: "project-1",
+        code: "YYHHC",
         name: "东门观光车",
         status: "RUNNING",
         waiting_count: 1,
@@ -43,7 +44,7 @@ describe("PublicDisplayCenterPage", () => {
   beforeEach(() => {
     pollingResource.data = {
       ...pollingResource.data,
-      projects: [{ ...pollingResource.data.projects[0], current_batch: null }],
+      projects: [{ ...pollingResource.data.projects[0], code: "YYHHC", current_batch: null }],
     };
   });
 
@@ -58,54 +59,30 @@ describe("PublicDisplayCenterPage", () => {
     expect(displayOverview).toHaveBeenCalledOnce();
     expect(screen.getByRole("region", { name: "项目实时监控墙" })).toBeVisible();
     expect(screen.getByRole("heading", { name: "东门观光车" })).toBeVisible();
+    expect(screen.getByRole("link", { name: "进入东门观光车项目大屏" })).toHaveAttribute("href", "/display/YYHHC");
+    expect(screen.getByText("进入项目大屏")).toBeVisible();
     expect(screen.queryByRole("button", { name: "退出" })).not.toBeInTheDocument();
     expect(screen.queryByRole("navigation", { name: "管理任务" })).not.toBeInTheDocument();
   });
 
-  it("新叫号批次出现时用前端中文语音连续三次播报号码", () => {
-    const speak = vi.fn();
-    const cancel = vi.fn();
-    class SpeechSynthesisUtteranceMock {
-      lang = "";
-      rate = 1;
-
-      constructor(public text: string) {}
-    }
-    vi.stubGlobal("SpeechSynthesisUtterance", SpeechSynthesisUtteranceMock);
-    vi.stubGlobal("speechSynthesis", { speak, cancel, paused: false, resume: vi.fn() });
-    const { container, rerender } = render(<PublicDisplayCenterPage />);
+  it("总览页不包含叫号声音控件或音频播放器", () => {
+    const { container } = render(<PublicDisplayCenterPage />);
 
     expect(screen.queryByRole("button", { name: "开启叫号声音" })).not.toBeInTheDocument();
     expect(screen.queryByText("叫号声音已开启")).not.toBeInTheDocument();
     expect(container.querySelector("audio")).toBeNull();
 
-    pollingResource.data = {
-      ...pollingResource.data,
-      projects: [{
-        ...pollingResource.data.projects[0],
-        current_batch: {
-          batch_number: 3,
-          status: "CALLED",
-          called_at: "2026-07-31T08:01:00Z",
-          tickets: [{ ticket_number: "00016", status: "CALLED", party_size: 2 }],
-        },
-      }],
-    };
-    rerender(<PublicDisplayCenterPage />);
-    pollingResource.data = {
-      ...pollingResource.data,
-      projects: pollingResource.data.projects.map((project: Record<string, unknown>) => ({ ...project })),
-    };
-    rerender(<PublicDisplayCenterPage />);
+  });
 
-    expect(cancel).toHaveBeenCalledOnce();
-    expect(speak).toHaveBeenCalledTimes(3);
-    for (const [utterance] of speak.mock.calls) {
-      expect(utterance).toMatchObject({
-        text: "请零零零一六号，前往入口。",
-        lang: "zh-CN",
-        rate: 0.9,
-      });
-    }
+  it("项目编码缺失时不会用内部项目 ID 生成大屏地址", () => {
+    pollingResource.data = {
+      ...pollingResource.data,
+      projects: [{ ...pollingResource.data.projects[0], code: undefined }],
+    };
+
+    render(<PublicDisplayCenterPage />);
+
+    expect(screen.queryByRole("link", { name: "进入东门观光车项目大屏" })).not.toBeInTheDocument();
+    expect(screen.queryByText("进入项目大屏")).not.toBeInTheDocument();
   });
 });
diff --git a/web/src/pages/PublicDisplayCenterPage.tsx b/web/src/pages/PublicDisplayCenterPage.tsx
index f2e2183..83e98a4 100644
--- a/web/src/pages/PublicDisplayCenterPage.tsx
+++ b/web/src/pages/PublicDisplayCenterPage.tsx
@@ -1,38 +1,19 @@
-import { useEffect, useRef } from "react";
 import { api } from "../api";
 import { FeedbackBanner, FreshnessBanner, LoadingState } from "../components/Feedback";
 import { usePollingResource } from "../hooks/usePollingResource";
-import { useSpeechAnnouncements } from "../hooks/useSpeechAnnouncements";
-import { formatCallAnnouncement, isTimestampStale } from "../lib/format";
-import type { CallBatchDto } from "../types";
+import { isTimestampStale } from "../lib/format";
+import type { AdminProjectDto } from "../types";
 import { DisplayCenter } from "./AdminPage";
 
-function projectCurrentBatch(value: unknown): CallBatchDto | null {
-  return value && typeof value === "object" ? value as CallBatchDto : null;
+function projectDisplayHref(project: AdminProjectDto) {
+  const code = project.code?.trim();
+  return code ? `/display/${encodeURIComponent(code)}` : undefined;
 }
 
 export function PublicDisplayCenterPage() {
-  const { announce } = useSpeechAnnouncements();
   const resource = usePollingResource((signal) => api.displayOverview(signal), { intervalMs: 5_000 });
   const data = resource.data;
   const stale = Boolean(data) && isTimestampStale(resource.lastClientSuccessAt, 30_000);
-  const lastCallsRef = useRef<Map<string, string | null> | null>(null);
-  useEffect(() => {
-    if (!data) return;
-    const previousCalls = lastCallsRef.current;
-    const nextCalls = new Map<string, string | null>();
-    const announcements: string[] = [];
-    for (const project of data.projects) {
-      const batch = projectCurrentBatch(project.current_batch);
-      const key = batch ? `${batch.batch_number}:${batch.called_at ?? ""}` : null;
-      nextCalls.set(project.id, key);
-      if (!previousCalls?.has(project.id) || !key || previousCalls.get(project.id) === key) continue;
-      const announcement = formatCallAnnouncement(batch);
-      if (announcement) announcements.push(announcement);
-    }
-    lastCallsRef.current = nextCalls;
-    announce(announcements);
-  }, [announce, data]);
 
   return (
     <div className="app-shell app-shell--admin app-shell--no-primary-action">
@@ -55,7 +36,7 @@ export function PublicDisplayCenterPage() {
           {data ? (
             <>
               <FreshnessBanner offline={resource.offline} stale={stale} timestamp={resource.lastClientSuccessAt} refreshing={resource.refreshing} errorMessage={resource.error?.message} onRetry={resource.refresh} />
-              <DisplayCenter projects={data.projects} />
+              <DisplayCenter projects={data.projects} projectHref={projectDisplayHref} />
             </>
           ) : null}
         </section>
diff --git a/web/src/styles.css b/web/src/styles.css
index 8c9bb00..6216451 100644
--- a/web/src/styles.css
+++ b/web/src/styles.css
@@ -7405,3 +7405,43 @@ body:has(.visitor-page--mobile) {
     padding-block: var(--space-4);
   }
 }
+
+/* Public overview cards are full-document links so the Android WebView can
+   detect the project URL and start native announcements. */
+.screen-tile--link {
+  cursor: pointer;
+  color: inherit;
+  text-decoration: none;
+  transition:
+    border-color var(--motion-fast) var(--ease-standard),
+    box-shadow var(--motion-fast) var(--ease-standard),
+    transform var(--motion-fast) var(--ease-standard);
+}
+
+.screen-tile--link:hover {
+  border-color: rgba(11, 107, 58, .46);
+  box-shadow: 0 18px 42px rgba(16, 38, 29, .14);
+  text-decoration: none;
+  transform: translateY(-2px);
+}
+
+.screen-tile--link:focus-visible {
+  outline: 3px solid var(--color-primary);
+  outline-offset: 4px;
+  text-decoration: none;
+}
+
+.screen-tile--link:active {
+  transform: translateY(0);
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .screen-tile--link {
+    transition: none;
+  }
+
+  .screen-tile--link:hover,
+  .screen-tile--link:active {
+    transform: none;
+  }
+}