feat: webapp multi-tab JS bridge and multi-WebView management

app/src/main/java/top/yeij/hearth/webview/WebViewManager.kt

@@ -2,17 +2,44 @@ package top.yeij.hearth.webview
 
 import android.annotation.SuppressLint
 import android.app.Activity
+import android.graphics.Color
+import android.view.ViewGroup
 import android.webkit.WebView
-import android.webkit.WebSettings
 import android.webkit.WebViewClient
 
+// WebView 工厂：统一内核配置，桌面层挂到指定父容器，内容层按需创建
+// WebView factory: unified kernel config; the desktop layer attaches to a given
+// parent container, content layers are created on demand
 class WebViewManager(private val activity: Activity) {
+    // 创建桌面 WebView（底层 H5）挂到 parent，加载内置 index.html
+    // Create the desktop WebView (bottom H5 layer) under parent, load bundled index.html
     @SuppressLint("SetJavaScriptEnabled")
-    fun attach(bridge: JsBridge): WebView {
+    fun attach(bridge: JsBridge, parent: ViewGroup): WebView {
         val webView = WebView(activity)
-        // 透明背景，露出原生壁纸
-        // Transparent background to reveal native wallpaper
-        webView.setBackgroundColor(android.graphics.Color.TRANSPARENT)
+        webView.setBackgroundColor(Color.TRANSPARENT)
+        configure(webView)
+        webView.addJavascriptInterface(bridge, "HearthBridge")
+        webView.webViewClient = WebViewClient()
+        webView.loadUrl("file:///android_asset/h5/index.html")
+        parent.addView(webView, ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT))
+        return webView
+    }
+
+    // 创建内容 WebView（webAPP 标签页），仅配置不加载、不挂载（由宿主管理）
+    // Create a content WebView (webapp tab), configured but not loaded/attached
+    // (lifecycle is managed by the host)
+    @SuppressLint("SetJavaScriptEnabled")
+    fun createContentWebView(): WebView {
+        val webView = WebView(activity)
+        webView.setBackgroundColor(Color.WHITE)
+        configure(webView)
+        return webView
+    }
+
+    // 统一内核配置：JS、宽视口、DOM 存储，禁用缩放
+    // Common kernel config: JS, wide viewport, DOM storage, zoom disabled
+    @SuppressLint("SetJavaScriptEnabled")
+    private fun configure(webView: WebView) {
         webView.settings.apply {
             javaScriptEnabled = true
             useWideViewPort = true
@@ -20,10 +47,5 @@ class WebViewManager(private val activity: Activity) {
             setSupportZoom(false)
             domStorageEnabled = true
         }
-        webView.addJavascriptInterface(bridge, "HearthBridge")
-        webView.webViewClient = WebViewClient()
-        webView.loadUrl("file:///android_asset/h5/index.html")
-        activity.setContentView(webView)
-        return webView
     }
 }