fix: per-app scale via CSS zoom, hide download icon when local version matches

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

@@ -43,18 +43,10 @@ class WebViewManager(private val activity: Activity) {
             ua == "desktop" || ua == "pc" -> UA_DESKTOP
             else -> ua
         }
-        // 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) {
-            val s = scale / 100f
-            webView.scaleX = s
-            webView.scaleY = s
-            webView.pivotX = 0f
-            webView.pivotY = 0f
-        }
+        // scale 由 WebAppHost 在 onPageFinished 里通过 CSS zoom 实现（reflow 缩放），
+        // 此处不再做 View 级别缩放
+        // scale is applied by WebAppHost via CSS zoom in onPageFinished (reflow
+        // scaling); no view-level scaling here
         return webView
     }