[Woo POS] Move analytics tracking to VM

[samiuelson]

WOOMOB-1567

Description

This PR refactors analytics tracking for the back navigation action in the WooPos cash payment flow by moving the tracking logic from the navigation handler to the ViewModel layer.

• Removed analytics tracking from the navigation event handler
• Added analytics tracking to the ViewModel via a new onBackClicked() method
• Simplified the root screen by removing analytics tracker dependency from navigation components

Test Steps

It's important to test if the analytics event is tracked correctly in the Cash screen, during back click – both on the top toolbar and the system back:
🔵 Tracked: woocommerceandroid_pos_back_to_checkout_from_cash

Images/gif

N/A

• I have considered if this change warrants release notes and have added them to RELEASE-NOTES.txt if necessary. Use the "[Internal]" label for non-user-facing changes.

[Copilot]

Pull Request Overview

This PR refactors analytics tracking for the back navigation action in the WooPos cash payment flow by moving the tracking logic from the navigation handler to the ViewModel layer. This improves separation of concerns by keeping UI/navigation logic separate from business logic and analytics tracking.

• Removed analytics tracking from the navigation event handler
• Added analytics tracking to the ViewModel via a new onBackClicked() method
• Simplified the root screen by removing analytics tracker dependency from navigation components

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
WooPosNavigationEventHandler.kt	Removed analytics tracking logic and tracker dependency from GoBack navigation event handling
WooPosRootScreen.kt	Removed analytics tracker parameter from root screen composition functions
WooPosActivity.kt	Removed analytics tracker parameter when initializing WooPosRootScreen
WooPosCashPaymentViewModel.kt	Added new onBackClicked() method to handle analytics tracking for back navigation
WooPosCashPaymentScreen.kt	Updated back click handlers to call ViewModel's onBackClicked() method before triggering navigation

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[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce-Wear Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce-Wear Android
	Platform	⌚️ Wear OS
	Flavor	Jalapeno
	Build Type	Debug
	Commit	cfcb961
	Direct Download	woocommerce-wear-prototype-build-pr14815-cfcb961.apk

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Commit	cfcb961
	Direct Download	woocommerce-prototype-build-pr14815-cfcb961.apk

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 38.23%. Comparing base (27b6bed) to head (cfcb961).
⚠️ Report is 2 commits behind head on trunk.

Files with missing lines	Patch %	Lines
...i/woopos/cashpayment/WooPosCashPaymentViewModel.kt	0.00%	4 Missing ⚠️
...ocommerce/android/ui/woopos/root/WooPosActivity.kt	0.00%	1 Missing ⚠️
...os/root/navigation/WooPosNavigationEventHandler.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##              trunk   #14815      +/-   ##
============================================
- Coverage     38.23%   38.23%   -0.01%     
- Complexity    10085    10086       +1     
============================================
  Files          2129     2129              
  Lines        120421   120425       +4     
  Branches      16489    16490       +1     
============================================
+ Hits          46047    46048       +1     
- Misses        69718    69722       +4     
+ Partials       4656     4655       -1     

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