fix: view-level webview scale, close menu on outside tap/page switch

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

@@ -43,13 +43,17 @@ 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。
-        // 需关闭 overview 模式，否则 useWideViewPort+overview 会自动重新缩放并覆盖 setInitialScale
-        // Initial zoom (1-100): scale desktop pages to fit landscape. Must disable
-        // overview mode, otherwise useWideViewPort+overview re-zooms and overrides setInitialScale
+        // 缩放（1-100）：View 级别 scaleX/scaleY，不依赖页面渲染或 viewport，对任何页面可靠生效。
+        // 缩放后内容相对左上角缩小；触摸坐标由 View 自动映射
+        // Zoom (1-100): view-level scaleX/scaleY, independent of page rendering or
+        // viewport, so it reliably works for any page. Content shrinks toward the
+        // top-left; touch coordinates are auto-mapped by the View
         if (scale != null && scale in 1..100) {
-            webView.settings.loadWithOverviewMode = false
-            webView.setInitialScale(scale)
+            val s = scale / 100f
+            webView.scaleX = s
+            webView.scaleY = s
+            webView.pivotX = 0f
+            webView.pivotY = 0f
         }
         return webView
     }