Update iOS & Android Features

I need both the Android and iOS builds of my app brought up to the latest 6am Mart release so that all existing features continue working after the core upgrade. There is no redesign involved—the task is strictly functional.

Primary areas to tackle
• User authentication – the current login and token flow occasionally fails after the recent server-side updates. I need seamless sign-in on first try, consistent session persistence, and full parity between the two platforms.
• Payment systems – Stripe and Razorpay SDKs must be bumped to their current stable versions and retested so every purchase, refund, and webhook callback runs without error on Android 13+ and iOS 17.
• 6am Mart core update – integrate the official latest release, resolve any breaking changes, and make sure existing modules (order tracking, restaurant listing, driver assignment) compile cleanly.

Deliverables
1. Updated source code for Android (Kotlin) and iOS (Swift/Objective-C mix) that compiles with no warnings in Android Studio Giraffe and Xcode 15.
2. Signed APK/AAB and TestFlight build ready for submission.
3. A brief change-log outlining files touched and SDK versions upgraded.
4. One round of post-submission support to address any store-review blockers.

If you have already worked with 6am Mart or similar multi-vendor stacks, let me know; that experience will help you move quickly.