diff --git a/app/src/main/assets/h5/js/pages/settings.js b/app/src/main/assets/h5/js/pages/settings.js
index 6c23aae..615ecca 100644
--- a/app/src/main/assets/h5/js/pages/settings.js
+++ b/app/src/main/assets/h5/js/pages/settings.js
@@ -42,6 +42,10 @@ window.loadSettings = function () {
       <span class="arrow" id="check-update-state">›</span>
     </div>
     <div class="st-group">关于</div>
+    <div class="st-item" id="export-log-item">
+      <span class="lbl">导出日志</span>
+      <span class="arrow" id="export-log-state">›</span>
+    </div>
     <div class="st-item"><span class="lbl">版本 0.1.0</span><span class="arrow">›</span></div>
   </div>`;
   setupTheme(page);
@@ -51,6 +55,7 @@ window.loadSettings = function () {
   setupBrightness(page);
   setupServerUrl(page);
   setupCheckUpdate(page);
+  setupExportLog(page);
 };
 
 // 判断当前是否深色主题（与 mask.js 逻辑一致）
@@ -238,6 +243,21 @@ function setupCheckUpdate(page) {
   };
 }
 
+// 导出日志：点击导出到 Download，显示结果
+// Export log: tap to export to Download, show the result
+function setupExportLog(page) {
+  const item = page.querySelector('#export-log-item');
+  const state = page.querySelector('#export-log-state');
+  item.onclick = () => {
+    state.textContent = '导出中…';
+    bridge.call('exportLog').then(result => {
+      state.textContent = result + ' ›';
+    }).catch(() => {
+      state.textContent = '失败 ›';
+    });
+  };
+}
+
 // 通用滑块拖动：touch 拖动实时回调（保留 click 兼容桌面调试）
 // Generic draggable slider: touch-drag with live callback (click kept for desktop)
 function makeSliderDraggable(slider, onRatio) {
diff --git a/app/src/main/java/top/yeij/hearth/MainActivity.kt b/app/src/main/java/top/yeij/hearth/MainActivity.kt
index c09e573..3420136 100644
--- a/app/src/main/java/top/yeij/hearth/MainActivity.kt
+++ b/app/src/main/java/top/yeij/hearth/MainActivity.kt
@@ -2,6 +2,7 @@ package top.yeij.hearth
 
 import android.app.Activity
 import android.app.WallpaperManager
+import android.content.ContentValues
 import android.content.Intent
 import android.content.res.Configuration
 import android.graphics.Bitmap
@@ -10,6 +11,7 @@ import android.graphics.Color
 import android.graphics.drawable.GradientDrawable
 import android.net.Uri
 import android.os.Bundle
+import android.provider.MediaStore
 import android.provider.Settings
 import android.text.TextUtils
 import android.util.Base64
@@ -215,6 +217,7 @@ class MainActivity : Activity() {
             onShowTabPanel = { showNativeTabPanel() },
             storage = webAppStorage,
             onImportOfflinePackage = { id -> startImportOfflinePackage(id) },
+            onExportLog = { exportLog() },
         )
         root = FrameLayout(this)
         setContentView(root)
@@ -436,6 +439,34 @@ class MainActivity : Activity() {
     // dp to px
     private fun dp(v: Int): Int = (v * resources.displayMetrics.density).toInt()
 
+    // 导出日志到 Download 目录（读 logcat 本进程 + 过滤 Hearth 相关行）
+    // Export the log to the Download directory (read logcat, filter Hearth lines)
+    private fun exportLog(): String {
+        return try {
+            val process = Runtime.getRuntime().exec(arrayOf("logcat", "-d"))
+            val log = process.inputStream.bufferedReader().readText()
+            val filtered = log.lines()
+                .filter { it.contains("Hearth") }
+                .joinToString("\n")
+            val name = "hearth-log-" + System.currentTimeMillis() + ".txt"
+            val values = ContentValues().apply {
+                put(MediaStore.Downloads.DISPLAY_NAME, name)
+                put(MediaStore.Downloads.MIME_TYPE, "text/plain")
+                put(MediaStore.Downloads.RELATIVE_PATH, "Download/")
+            }
+            val uri = contentResolver.insert(MediaStore.Downloads.EXTERNAL_CONTENT_URI, values)
+                ?: return "导出失败：无法创建文件"
+            contentResolver.openOutputStream(uri)?.use { out ->
+                out.write(filtered.toByteArray())
+            } ?: return "导出失败：无法写入"
+            Log.d(TAG, "exportLog: $name (${filtered.length} chars)")
+            "已导出：Download/$name"
+        } catch (e: Exception) {
+            Log.e(TAG, "exportLog failed: ${e.message}")
+            "导出失败：${e.message}"
+        }
+    }
+
     // 触发 SAF 选择 zip 导入离线包
     // Trigger SAF to pick a zip for offline-package import
     private fun startImportOfflinePackage(id: String) {
diff --git a/app/src/main/java/top/yeij/hearth/webapp/WebAppRepository.kt b/app/src/main/java/top/yeij/hearth/webapp/WebAppRepository.kt
index 0419129..f0fb72e 100644
--- a/app/src/main/java/top/yeij/hearth/webapp/WebAppRepository.kt
+++ b/app/src/main/java/top/yeij/hearth/webapp/WebAppRepository.kt
@@ -41,6 +41,7 @@ class WebAppRepository(
 
     fun fetchManifest(): List<WebApp> {
         val body = http.get(manifestUrl)
+        Log.d(TAG, "fetchManifest: url=$manifestUrl bodyNull=${body == null}")
         if (body != null) {
             // 先解析、成功才缓存，避免畸形 body 或空结果被永久缓存
             // Parse first, cache only on success (never cache malformed/empty bodies)
diff --git a/app/src/main/java/top/yeij/hearth/webview/JsBridge.kt b/app/src/main/java/top/yeij/hearth/webview/JsBridge.kt
index 76c655b..b758a1d 100644
--- a/app/src/main/java/top/yeij/hearth/webview/JsBridge.kt
+++ b/app/src/main/java/top/yeij/hearth/webview/JsBridge.kt
@@ -81,6 +81,9 @@ class JsBridge(
     // 手动导入离线包回调：由 MainActivity 实现（SAF 选择 zip 后导入）
     // Manual offline-package import callback implemented by MainActivity (SAF pick + import)
     private val onImportOfflinePackage: ((String) -> Unit)? = null,
+    // 导出日志回调：由 MainActivity 实现，返回导出结果描述（文件名/错误）
+    // Export-log callback implemented by MainActivity, returns a result description
+    private val onExportLog: (() -> String)? = null,
 ) {
     private val gson = com.google.gson.Gson()
 
@@ -185,6 +188,14 @@ class JsBridge(
     @android.webkit.JavascriptInterface
     fun hasLocalPackage(id: String): Boolean = storage?.hasLocalPackage(id) ?: false
 
+    // 导出日志到 Download 目录，返回结果描述（文件名或错误）
+    // Export the log to the Download directory, return a result description
+    @android.webkit.JavascriptInterface
+    fun exportLog(): String {
+        Log.d("HearthBridge", "exportLog called")
+        return onExportLog?.invoke() ?: "日志导出未实现"
+    }
+
     // 本地离线包版本号（无则空字符串）
     // Local offline-package version (empty string when absent)
     @android.webkit.JavascriptInterface