Add keyboard dismiss toolbar for iOS numeric and multi-line fields

Creates a reusable KeyboardDismissToolbar view modifier that adds a
"Done" button to dismiss keyboards that don't have a return key.
Applied to all numeric keyboards (numberPad, decimalPad, phonePad)
and multi-line text inputs (TextEditor, TextField with axis: .vertical).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

iosApp/iosApp/Helpers/KeyboardDismissToolbar.swift

@@ -0,0 +1,28 @@
+import SwiftUI
+
+/// A view modifier that adds a keyboard toolbar with a "Done" button to dismiss the keyboard.
+/// Use this for numeric keyboards (.numberPad, .decimalPad, .phonePad) and multi-line text fields
+/// that don't have a return key for dismissal.
+struct KeyboardDismissToolbar: ViewModifier {
+    func body(content: Content) -> some View {
+        content
+            .toolbar {
+                ToolbarItemGroup(placement: .keyboard) {
+                    Spacer()
+                    Button("Done") {
+                        UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
+                    }
+                    .foregroundColor(Color.appPrimary)
+                    .fontWeight(.medium)
+                }
+            }
+    }
+}
+
+extension View {
+    /// Adds a keyboard toolbar with a "Done" button to dismiss the keyboard.
+    /// Use this for numeric keyboards and multi-line text fields.
+    func keyboardDismissToolbar() -> some View {
+        modifier(KeyboardDismissToolbar())
+    }
+}