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

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

@@ -278,6 +278,22 @@ class MainActivity : Activity() {
             }
             val webView = WebViewManager(this@MainActivity).createContentWebView(ua, scale)
             webView.webViewClient = object : WebViewClient() {
+                override fun onPageFinished(view: WebView?, url: String?) {
+                    Log.d(TAG, "content onPageFinished: url=$url scale=$scale")
+                    // 缩放：网易云 PC 版不响应 viewport meta 的 initial-scale，
+                    // 改用 CSS zoom（会 reflow，内容填满不留白），对任何页面可靠生效
+                    // Zoom: desktop pages (e.g. NetEase Music) ignore viewport-meta
+                    // initial-scale, so use CSS zoom (reflows, no blank space), which
+                    // works reliably on any page
+                    if (scale != null && scale in 1..100) {
+                        val zoom = scale / 100f
+                        view?.evaluateJavascript(
+                            "(function(){var z='$zoom';var s=document.createElement('style');s.innerHTML='html{zoom:'+z+'}';document.head.appendChild(s);})();",
+                            null
+                        )
+                    }
+                }
+
                 @Suppress("DEPRECATION", "OVERRIDE_DEPRECATION")
                 override fun onReceivedError(
                     view: WebView?,

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
     }