fix(menu): respect ion-app dir attribute for menu animation side

[Arul1998]

Issue number: resolves #30226

---

What is the current behavior?

When dir="rtl" is set on <ion-app> (but not on document), the hamburger menu appears on the right side visually, but the open animation still slides in from the left. This happens because isEndSide() only checked document.dir, not the nearest ancestor dir attribute.

What is the new behavior?

• isEndSide() now resolves RTL from the nearest ancestor with a dir attribute (e.g. <ion-app dir="rtl">), falling back to document.dir when none is found
• Uses the existing isRTL() utility instead of custom logic
• sideChanged() in ion-menu also passes the menu element so the side is correct before the first animation
• Unit tests and an e2e test added for the ion-app dir="rtl" case

Does this introduce a breaking change?

• Yes
• No

Other information

• Builds on community PR fix: helper function that determines the ion-menu animation side now … #31214 with a more complete fix
• Reproduction: ionic start sidemenu app → set <ion-app dir="rtl"> → open menu → animation should come from the right

[vercel]

@Arul1998 is attempting to deploy a commit to the Ionic Team on Vercel.

A member of the Team first needs to authorize it.