fix: Allow Backspace and Delete keys in WASM Skia TextBox/PasswordBox

src/Uno.UI.Runtime.Skia.WebAssembly.Browser/ts/Runtime/BrowserInvisibleTextBoxViewExtension.ts

@@ -96,6 +96,14 @@
 					}
 				}
 
+				// Allow Backspace and Delete keys to be handled by the browser's default behavior
+				// This is especially important for mobile soft keyboards (e.g., Android)
+				// The oninput event will handle the text changes and propagate them to managed code
+				// However, exclude Ctrl/Cmd+Backspace/Delete as those need to be handled by managed code for word deletion
+				if ((ev.key === "Backspace" || ev.key === "Delete") && !ev.ctrlKey && !ev.metaKey) {
+					return;
+				}
+
 				ev.preventDefault();
 			};