feat: per-app initial scale config

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

@@ -31,7 +31,7 @@ class WebViewManager(private val activity: Activity) {
     // (lifecycle is managed by the host); transparent background so a webapp without
     // a declared background shows the wallpaper instead of a default white
     @SuppressLint("SetJavaScriptEnabled")
-    fun createContentWebView(ua: String?): WebView {
+    fun createContentWebView(ua: String?, scale: Int?): WebView {
         val webView = WebView(activity)
         webView.setBackgroundColor(Color.TRANSPARENT)
         configure(webView)
@@ -43,6 +43,11 @@ class WebViewManager(private val activity: Activity) {
             ua == "desktop" || ua == "pc" -> UA_DESKTOP
             else -> ua
         }
+        // 初始缩放（1-100）：用于 PC 版页面缩放适配横屏
+        // Initial zoom (1-100): scale desktop pages to fit landscape
+        if (scale != null && scale in 1..100) {
+            webView.setInitialScale(scale)
+        }
         return webView
     }