fix(app): hide WebKit's form bar over the keyboard in the iOS app

app/ios/App/App/HerdrBridgeViewController.swift

@@ -372,6 +372,10 @@ class HerdrBridgeViewController: CAPBridgeViewController {
         return configuration
     }
 
+    override func webView(with frame: CGRect, configuration: WKWebViewConfiguration) -> WKWebView {
+        WebViewWithoutFormBar(frame: frame, configuration: configuration)
+    }
+
     override func capacitorDidLoad() {
         bridge?.registerPluginInstance(HerdrShellPlugin())
         bridge?.registerPluginInstance(OvisPushPlugin())
@@ -543,6 +547,15 @@ class HerdrBridgeViewController: CAPBridgeViewController {
     }
 }
 
+/// The app's web view, without WebKit's form accessory bar: the up and down arrows and the check
+/// mark it puts over the keyboard (#2043). The client has its own key bar, and on a phone the bar
+/// took another row of the screen; a page cannot remove it. WebKit asks the web view for the
+/// keyboard's accessory view (since iOS 13), so this public override does what
+/// @capacitor/keyboard's `hideFormAccessoryBar` does by patching WebKit's private content view.
+private final class WebViewWithoutFormBar: WKWebView {
+    override var inputAccessoryView: UIView? { nil }
+}
+
 /// Passes every navigation callback to Capacitor's own delegate and reports a main-frame load
 /// that failed, such as a PC that is off or one that answers with an HTTP error, with its reason.
 /// A load cancelled on purpose (a link handed to Safari, a new navigation) is not a failure.

changelog.d/ios-hide-form-accessory-bar.md

@@ -0,0 +1,4 @@
+### Fixed
+- The iOS app no longer shows WebKit's form bar (the up and down arrows and the check mark) over
+  the keyboard, so only Ovis's own key bar sits above it and the page keeps that row of the
+  screen.

docs/native-app.md

@@ -218,6 +218,11 @@ What is there:
   one goes with its web view. `@capacitor/barcode-scanner` kept every old one alive (its scanner
   manager holds the view controller, which holds the bridge and the plugin), so
   `app/patches` makes that manager for each scan instead of keeping it.
+  `HerdrBridgeViewController` also hides WebKit's form accessory bar (the up and down arrows and the check mark over the
+  keyboard), as `@capacitor/keyboard`'s `hideFormAccessoryBar` would, without that plugin or its
+  patch of WebKit's private content view: its web view is a `WKWebView` subclass whose
+  `inputAccessoryView` is nil, which WebKit asks for since iOS 13. The client has its own key bar,
+  and a page cannot remove WebKit's.
 - In the client, `src/lib/nativeApp.ts` notices the app through `window.Capacitor`, as the app
   injects it; the browser build carries no Capacitor code. Inside the app:
   - Settings → Phone & devices has a Change PC row, and so does the pairing screen (a PC that