feat: install-locally button, log delete result

app/src/main/assets/h5/js/pages/webapplist.js

@@ -114,6 +114,13 @@ async function showWebAppMenu(app, x, y) {
       bridge.call('deleteLocalPackage', app.id).then(() => refreshList()).catch(() => {});
     });
   }
+  // 安装到本地（本地无包 + 云端有离线包：预下载到本地，不打开）
+  // Install locally (no local package + cloud offline package: pre-download without opening)
+  if (!hasLocal && app.offline) {
+    addItem('安装到本地', () => {
+      bridge.call('updateOfflinePackage', app.id).then(() => refreshList()).catch(() => {});
+    });
+  }
   // 导入
   addItem('导入离线包', () => {
     bridge.call('importOfflinePackage', app.id).catch(() => {});

app/src/main/java/top/yeij/hearth/webapp/WebAppStorage.kt

@@ -52,8 +52,8 @@ class WebAppStorage(private val context: Context) {
     // 删除本地离线包
     // Delete the local offline package
     fun deleteLocalPackage(id: String) {
-        appDir(id).deleteRecursively()
+        val deleted = appDir(id).deleteRecursively()
-        Log.d(TAG, "deleteLocalPackage: id=$id")
+        Log.d(TAG, "deleteLocalPackage: id=$id deleted=$deleted")
     }
 
     // 下载并解压离线包（记录版本号），onProgress 回调 0-100