fix(overlays,picker): remove invalid aria-hidden attribute (#30563)

Issue number: resolves #30040

---------

## What is the current behavior?
- The usage of `aria-hidden="true"` attributes both on overlay and
picker components was causing some console error/warnings messages.
- This was being caused due the fact of the activeElement (focused
element) was inside those elements with this attribute that's equal to
true in all cases.


![d13215a4-a610-4b1f-81d8-ce3ae05df790](https://github.com/user-attachments/assets/1b79c8bf-b23a-4165-8fb4-894be27bbad4)

## What is the new behavior?
- There is no need of making usage of this attribute due the facts:
- 1. Once overlay is closed the focus will be redirect to the element
that triggers the overlay, this way screen readers will be also
redirected to the same context of focused element.
- 2. After overlay is closed, it will be set as a `display: none;`
through the selector `:host(.overlay-hidden)`, which by itself will
disable overlay content for the screen readers.

- Removed overlay tests since they were basically checking about
`aria-hidden` attribute.
- Updated PickerColumn and PickerColumnOption structure in order to fit
the a11y needs.
- Added a focus management system to better drive users when making
usage of keyboard navigation inside picker.
- Skip A11Y test validation when reported violation is color contrast
related.

### ⚠️ NOTE:
- Reported devTools issue/warning when selecting picker is **from now
on** expected due to focus an input that's set with `tabIndex="-1"` and
`aria-hidden="true"` - Which turns into an A11Y violation when it gets
focused.
It happens that it gets focused dynamically in order to open the native
numeric keyboard **once user selects highlighted picker values zone**,
in order to allow users to insert numeric values through the keyboard.
If this `aria-hidden` and `tabindex` are removed/updated, the existing
functionality will be lost since ScreenReaders will start to ignore the
updated value through the PickerChange and will be focused onto the
focused input.
This mentioned input has an onChange event that's used to update the
`aria-valuetext` on each `picker-column` which is being capture by the
ScreenReader.
That said, this new devTools reported issue/warning is a false positive
since A11Y behaviour is being covered through a different perspective.

## Does this introduce a breaking change?

- [ ] Yes
- [X] No

## Testing:

- ✅ [ActionSheet
Preview](https://ionic-framework-git-rou-11368-to-main-ionic1.vercel.app/src/components/action-sheet/test/a11y)
- ✅ [Alert
Preview](https://ionic-framework-git-rou-11368-to-main-ionic1.vercel.app/src/components/alert/test/a11y)
- ✅ [DateTime
Preview](https://ionic-framework-git-rou-11368-to-main-ionic1.vercel.app/src/components/datetime/test/basic)
- ✅ [DateTime Button
Preview](https://ionic-framework-git-rou-11368-to-main-ionic1.vercel.app/src/components/datetime-button/test/basic)
- ✅ [Modal
Preview](https://ionic-framework-git-rou-11368-to-main-ionic1.vercel.app/src/components/modal/test/a11y)
- ✅ [Popover
Preview](https://ionic-framework-git-rou-11368-to-main-ionic1.vercel.app/src/components/popover/test/basic)
- ✅ [Select
Preview](https://ionic-framework-git-rou-11368-to-main-ionic1.vercel.app/src/components/select/test/basic)
- ✅ [Picker, PickerColumn and PickerColumnOption
Preview](https://ionic-framework-git-rou-11368-to-main-ionic1.vercel.app/src/components/picker/test/basic)
- ✅ [Toast
Preview](https://ionic-framework-git-rou-11368-to-main-ionic1.vercel.app/src/components/toast/test/a11y)

## Other Information

Dev build: `8.7.4-dev.11756388042.1a103a79`

---------

Co-authored-by: ionitron <hi@ionicframework.com>
Co-authored-by: Brandy Smith <6577830+brandyscarney@users.noreply.github.com>
Co-authored-by: Brandy Smith <brandyscarney@users.noreply.github.com>

Author: 3 people

core/src/components/datetime/datetime.tsx

@@ -3,6 +3,7 @@ import { Component, Element, Event, Host, Method, Prop, State, Watch, h, writeTa
 import { startFocusVisible } from '@utils/focus-visible';
 import { getElementRoot, raf, renderHiddenInput } from '@utils/helpers';
 import { printIonError, printIonWarning } from '@utils/logging';
+import { FOCUS_TRAP_DISABLE_CLASS } from '@utils/overlays';
 import { isRTL } from '@utils/rtl';
 import { createColorClasses } from '@utils/theme';
 import { caretDownSharp, caretUpSharp, chevronBack, chevronDown, chevronForward } from 'ionicons/icons';
@@ -1598,7 +1599,7 @@ export class Datetime implements ComponentInterface {
       forcePresentation === 'time-date'
         ? [this.renderTimePickerColumns(forcePresentation), this.renderDatePickerColumns(forcePresentation)]
         : [this.renderDatePickerColumns(forcePresentation), this.renderTimePickerColumns(forcePresentation)];
-    return <ion-picker>{renderArray}</ion-picker>;
+    return <ion-picker class={FOCUS_TRAP_DISABLE_CLASS}>{renderArray}</ion-picker>;
   }
 
   private renderDatePickerColumns(forcePresentation: string) {

core/src/components/menu/menu.tsx

@@ -418,6 +418,9 @@ export class Menu implements ComponentInterface, MenuI {
    */
   @Method()
   setOpen(shouldOpen: boolean, animated = true, role?: string): Promise<boolean> {
+    // Blur the active element to prevent it from being kept focused inside an element that will be set with aria-hidden="true"
+    (document.activeElement as HTMLElement)?.blur();
+
     return menuController._setOpen(this, shouldOpen, animated, role);
   }
 

core/src/components/picker-column-option/picker-column-option.scss

@@ -3,7 +3,7 @@
 // Picker Column
 // --------------------------------------------------
 
-button {
+.picker-column-option-button {
   @include padding(0);
   @include margin(0);
 
@@ -40,6 +40,6 @@ button {
   opacity: 0.4;
 }
 
-:host(.option-disabled) button {
+:host(.option-disabled) .picker-column-option-button {
   cursor: default;
 }

core/src/components/picker-column-option/picker-column-option.tsx

@@ -124,9 +124,9 @@ export class PickerColumnOption implements ComponentInterface {
           ['option-disabled']: disabled,
         })}
       >
-        <button tabindex="-1" aria-label={ariaLabel} disabled={disabled} onClick={() => this.onClick()}>
+        <div class={'picker-column-option-button'} role="button" aria-label={ariaLabel} onClick={() => this.onClick()}>
           <slot></slot>
-        </button>
+        </div>
       </Host>
     );
   }

core/src/components/picker-column-option/test/a11y/picker-column-option.e2e.ts

@@ -10,7 +10,7 @@ configs({ directions: ['ltr'] }).forEach(({ config, title }) => {
     test('should not have accessibility violations', async ({ page }) => {
       await page.goto(`/src/components/picker-column-option/test/a11y`, config);
 
-      const results = await new AxeBuilder({ page }).analyze();
+      const results = await new AxeBuilder({ page }).disableRules('color-contrast').analyze();
 
       expect(results.violations).toEqual([]);
     });