fix: add LAUNCHER category and page-finished log

app/src/main/AndroidManifest.xml

@@ -11,6 +11,7 @@
             android:theme="@style/Theme.Hearth">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
                 <category android:name="android.intent.category.HOME" />
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>

app/src/main/java/top/yeij/hearth/MainActivity.kt

@@ -92,6 +92,12 @@ class MainActivity : Activity() {
         setContentView(root)
         desktopWebView = WebViewManager(this).attach(bridge, root)
         desktopWebView.webViewClient = object : WebViewClient() {
+            // 主帧加载完成时打日志，便于定位黑屏（判断 index.html 是否成功加载）
+            // Log when the main frame finishes loading, to help diagnose a black screen
+            override fun onPageFinished(view: WebView?, url: String?) {
+                Log.d(TAG, "onPageFinished: url=$url")
+            }
+
             // 主帧加载失败时展示错误页，避免白屏
             // Show an error page on main-frame load failure to avoid a blank screen
             @Suppress("DEPRECATION", "OVERRIDE_DEPRECATION")