fix(item-divider): apply safe area to proper side regardless of direction (#28420)

Issue number: Internal

---------

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issue. -->

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etc). Submit multiple pull requests if needed. -->

## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->
The safe area for Item Divider would change sides when the direction
changed. e.g., if the safe area padding should be on the left, it would
be on the left when the direction was LTR but would be on the right when
the direction was RTL. It should always be on the left.

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- The left safe area padding is on the left side of an Item Divider
whether the direction is LTR or RTL.
- The right safe area padding is on the right side of an Item Divider
whether the direction is LTR or RTL.
- Updated LTR and RTL screenshots for item to include an item divider

Similar to #28403 but for Item Divider.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->


## Other information

<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->

---------

Co-authored-by: ionitron <hi@ionicframework.com>
Co-authored-by: Liam DeBeasi <liamdebeasi@users.noreply.github.com>
Co-authored-by: Brandy Carney <brandyscarney@users.noreply.github.com>

core/src/components/item-divider/item-divider.scss

@@ -31,12 +31,19 @@
 
   @include font-smoothing();
   @include margin(0);
-  @include padding(
-    var(--padding-top),
-    var(--padding-end),
-    var(--padding-bottom),
-    calc(var(--padding-start) + var(--ion-safe-area-left, 0px))
-  );
+  @include padding(var(--padding-top), null, var(--padding-bottom), null);
+
+  /* stylelint-disable */
+  @include ltr() {
+    padding-right: var(--padding-end);
+    padding-left: calc(var(--padding-start) + var(--ion-safe-area-left, 0px));
+  }
+
+  @include rtl() {
+    padding-right: calc(var(--padding-start) + var(--ion-safe-area-right, 0px));
+    padding-left: var(--padding-end);
+  }
+  /* stylelint-enable */
 
   display: flex;
 
@@ -67,12 +74,19 @@
 
 .item-divider-inner {
   @include margin(0);
-  @include padding(
-    var(--inner-padding-top),
-    calc(var(--ion-safe-area-right, 0px) + var(--inner-padding-end)),
-    var(--inner-padding-bottom),
-    var(--inner-padding-start)
-  );
+  @include padding(var(--inner-padding-top), null, var(--inner-padding-bottom), null);
+
+  /* stylelint-disable */
+  @include ltr() {
+    padding-right: calc(var(--ion-safe-area-right, 0px) + var(--inner-padding-end));
+    padding-left: var(--inner-padding-start);
+  }
+
+  @include rtl() {
+    padding-right: var(--inner-padding-start);
+    padding-left: calc(var(--ion-safe-area-left, 0px) + var(--inner-padding-end));
+  }
+  /* stylelint-enable */
 
   display: flex;
 

core/src/components/item-divider/test/basic/item-divider.e2e.ts

@@ -46,5 +46,33 @@ configs().forEach(({ title, screenshot, config }) => {
       const divider = page.locator('ion-item-divider');
       await expect(divider).toHaveScreenshot(screenshot(`item-divider-icon-start`));
     });
+
+    /**
+     * This behavior needs to be tested for all modes & directions
+     * Safe padding should stay on the same side when the direction changes
+     */
+    test('should have safe area padding', async ({ page }) => {
+      await page.setContent(
+        `
+        <style>
+          :root {
+            --ion-safe-area-left: 40px;
+            --ion-safe-area-right: 20px;
+          }
+        </style>
+        <ion-list>
+          <ion-item-divider>
+            <ion-label>Item Divider</ion-label>
+            <ion-button slot="end">Button</ion-button>
+          </ion-item-divider>
+        </ion-list>
+      `,
+        config
+      );
+
+      const list = page.locator('ion-list');
+
+      await expect(list).toHaveScreenshot(screenshot('item-divider-safe-area'));
+    });
   });
 });